HomeMy WebLinkAboutBLD2017-00046 - 05 SWPPP •
2235 Broadway
JC IAT North Bend,OR 97459
Business:541.808.3300
JC Wilson Engineering&Consulting,LLC Cell:208.553.6742
zx cvativ aet www.jcwilsonengineering.com
STORMWATER MITIGATION PLAN AND SWPPP
D2( 1
11 1.
PROJECT:
THE KEG & I REMODEL MAR
JEFF 1§ ?017
lCi'SON
OWNER: coUNDCD
Keith Rasmussen
154 Wild Plum LN
Chimacum, WA 98325-8728
(619)309-8488
ENGINEER: APPROVED
Justin C. Wilson, PE STORMWATER PLAN
February 3, 2017 MAY 3 2017
UPDATE: March 15, 2017
JEFFERSON COUNTY
�p��}�
SIGNATURE: 447'4104r ,
• •
Stormwater Mitigation Plan and SWPPP 2017
TABLE OF CONTENTS
1.0 Background and Scope of Work Page 1
2.0 Stormwater Permitting Requirements Page 1
3.0 Design Considerations Page 2
3.1 Geotechnical Conditions Page 3
4.0 Stormwater Design Requirements Page 3
5.0 The Limitations of this Report Page 8
APPENDICES
Appendix I—Permitting Documents
Appendix II—Design Documents& Basin Map
Appendix III—Soils Report
Appendix IV—Project Plans
alb J4
w7iJea,31iV t 7
' ,. ...,..�.ar.,ww,wxa„r«•-.w-ea.sr::*'Ma.w� 'v;ew+-.�
•
II� 2235 Broadway
4/' T C V j/r j North Bend,OR 97459
Business:541.808.3300
JC Wilson Engineering&Consulting,LLC Cell:208.553.6742
www.jcwilsonengineering.com
Muir varve -F radical Strategic
March 15, 2017
Keith Rasmussen
154 Wild Plum LN
Chimacum, WA 98325-8728
(619)309-8488
Subject: STORM WATER MITIGATION PLAN, REPORT,AND SWPPP FOR THE PROPOSED
SITE IMPROVEMENTS AT 1291 CHIMACUM RD, CHIMACUM, WA 98325.
JEFFERSON COUNTY PARCEL#: 901113011
Dear Mr. Rasmussen and Others Concerned,
1.0 BACKGROUND AND SCOPE OF WORK
JC Wilson Engineering & Consulting, LLC was requested by StudioSTL to complete a stormwater
control plan to mitigate stormwater runoff related to the proposed gravel parking lot
improvements for the subject parcel. The approximately 0.78-acre property has been assigned
Jefferson County parcel number 901113011.
2.0 STORMWATER PERMITTING REQUIREMENTS
Development projects within the jurisdiction of Jefferson County are required to prepare
stormwater control plans in accordance with the Department of Ecology's (DOE) 2014
Stormwater Management Manual for Western Washington (SMMWW). The scope of
engineering design requirements is generally based on the total area of new impervious
surfaces and total land disturbing activities. The Stormwater Calculation Worksheet and Flow
Chart for New Development provided by Jefferson County were completed to determine the
applicable engineering design requirements. These documents are located in Appendix I for
reference.
This project is a "medium"project and thus must comply with "Minimum Requirements#1
through#5"of the DOE 2014 SMMWW must be met. These minimum requirements are
discussed in more detail in Section 5 of this report.
i r
Stormwater Mitigation Plan and SWPPP 2017
3.0 DESIGN CONSIDERATIONS
The purpose of this Stormwater Mitigation Plan and SWPPP is to promote the sustainability and
quality of the water resources that we have left on this earth. The two main goals of
stormwater mitigation is to reduce the amount of pollutants from entering our waters, and to
reduce or eliminate peak flows. One of the most successful strategies towards these goals is to
implement point source, low impact mitigation designs that fit well with existing topography
and environments.
The soils and topography on this small property lend themselves perfectly to a simple
infiltration located along the northern property line, abutting landscaping on the neighboring
property to the north. Location of the proposed pipe-less infiltration trench must have a flat
bottom, and have the open-graded drain rock wrapped on sides and top with fabric to keep
fines from infiltrating void spaces of the washed rock. There shall be no fabric placed on
bottom of the trench, to avoid plugging and a compromised facility. A thin layer of drain rock
shall be placed on top of the top fabric,to allow for easy maintenance and annual cleaning.
* There will be a minimal amount of grass and foliage in the flow path between the gravel
parking area and the infiltration trench, so it is important to maintain this infiltration
facility.
This WADOE inspired design was sized using roof downspout infiltration requirements
delineated for three different soil types. Soil on this site could be classified as requiring the
smallest length of 20'/1,000-sf impervious, but I designed this trench using a very conservative
30'/1,000-sf, and designed it to serve a more than required 5,000-sf. The facility is 150-ft in
length.
Area to be mitigated = 4,173.4 sf
150-If/30' = 5
5 * 1,000-sf
Mitigation Provided = 5,000.0 sf
I could utilize TR-55 to model the 100-yr storm event for the Type 1A hydrologic event, or
WWHM continuous simulation LID for the Chimacum region, but I feel that this minimal gravel
impervious impact could properly be modeled with either method.
2
i f •
Stormwater Mitigation Plan and SWPPP 2017
3.1 GEOTECHNICAL CONDITIONS
USDA Natural Resources Conservation Service (NRCS) soil information was utilized to obtain
general site soil conditions to determine what chosen BMP would work most effectively and
efficiently for this site. I do not typically propose retention facilities in areas that will not
infiltrate at least 2 in/hr, but soils on this site have much better than adequate infiltration
properties.
The soil map unit for this location is listed as SaB-San Juan gravelly sandy loam, 0 to 8 percent
slopes. This soil type is Hydrologic Soil Group A, and has a Ksat infiltration in the range of 5.95
to 19.98 in/hr. This is consistent with other projects that I have completed in this area. The
NRCS oil Report can be found in Appendix II of this document.
4.0 STORMWATER DESIGN REQUIREMENTS
The five basic minimum requirements of the DOE 2014 SMMWW have been followed to
complete a stormwater control plan for the proposed project. Compliance with the minimum
requirements is summarized below:
Minimum Requirement#1—Preparation of Stormwater Site Plan
A Stormwater Site Plan has been designed to mitigate increases in stormwater runoff
generated from new impervious surfaces created by the project. The Stormwater Site Plan is
included in Appendix Ill of this report.
Minimum Requirement#2—Construction Stormwater Pollution Prevention
To prevent erosion and discharge of sediment and other pollutants into receiving waters a
Construction Stormwater Pollution Prevention Plan (SWPPP)for the project has been
developed and is included with the Stormwater Site Plan in Appendix Ill. The 13 Elements of
construction stormwater pollution prevention were considered in developing the SWPPP.
Construction recommendations for meeting the goals of the 13 Elements of construction
stormwater pollution prevention are provided in this section.
Element#1: Preserve Vegetation/Mark Clearing Limits
Before beginning land disturbing activities, including clearing and grading,the
contractor shall clearly mark all clearing limits. The clearing limits shall be kept to the
minimal area necessary to construct the proposed facilities.
3
• • ,
Stormwater Mitigation Plan and SWPPP 2017
The native top soil and natural vegetation must be retained in an undisturbed state to
the maximum degree practicable.
Element#2: Establish Construction Access
There are two graveled entrances to the site, one being near the northwest corner of
the parcel off of Chimacum Road and the other in the southwest corner off of the
property off of the same road. Construction access to the site should be limited to one
of these routes if possible.
The access point to the site should be stabilized with a pad of quarry spalls or crushed
rock construction entrance to minimize tracking of sediment onto paved areas and
public roads.
Any sediment tracked off site onto roadways shall be cleaned thoroughly at the end of
each day or more frequently as necessary. Remove sediment from roads by shoveling,
sweeping, or pick up and transport the sediment to a controlled sediment disposal area.
Afterwards, conduct street washing if necessary.
Element#3: Control Flow Rates
Properties and waterways downstream of the project must be protected from erosion
resulting from increases in velocity of stormwater runoff from the project site. BMPs
shown on the included engineered plans shall be implemented to reduce or eliminate
increased stormwater runoff from this site.
Element#4: Install Sediment Controls
The contractor is responsible for installing and maintaining effective erosion control and
sediment control BMP's to minimize the discharge of pollutants. These BMP's shall be
functional before land disturbing activities take place. Straw wattles, silt fencing, or
brush barrier should be installed per instructions provided in the Temporary Erosion &
Sediment Control Plan.
Element#5: Stabilize Soils
Exposed and unworked soils shall be stabilized by application of effective BMP's that
prevent erosion.
Soils must not remain exposed and unworked for more than the time periods set forth
below to prevent erosion:
4
• •
Stormwater Mitigation Plan and SWPPP 12017
• During the dry season (May 1—Sept. 30): 7 days
• During the wet season (October 1—April 30): 2 days
Stabilize soils at the end of the shift before a holiday or weekend if needed based on the
weather forecast.
Stabilize soil stockpiles from erosion, protected with sediment trapping measures, and
where possible, be located away from storm drain inlets, and drainage channels.
The amount of exposed soil should be minimized as much as possible during
construction activity.
Element#6: Protect Slopes
Steep slopes requiring temporary protection during construction are not anticipated to
be encountered.
Element#7: Protect Drain Inlets
Catch basin filters or an equivalent BMP should be installed in any affected inlets to
prevent sediment from entering conveyance systems.
Element#8: Stabilize Channels and Outlets
On-site conveyance channels must be constructed and stabilized to prevent erosion.
This element should not be large factor on this improvement project.
Element#9: Control Pollutants
The contractor shall install, implement, and maintain effective pollution prevention
measures to minimize the discharge of pollutants.
The contractor shall handle and dispose of all pollutants, including waste materials and
demolition debris that occur on-site in a manner that does not cause contamination of
stormwater.
Cover, containment, and protection from vandalism for all chemicals, liquid products,
petroleum products, and other materials that have the potential to pose a threat to
human health or the environment shall be completed by the contractor. On-site fueling
tanks must include secondary containment with 110% of the volume contained in the
largest tank within the containment structure. Double-walled tanks do not require
additional secondary containment.
5
•
Stormwater Mitigation Plan and SWPPP 12017
Conduct maintenance, fueling, and repair of heavy equipment and vehicles using spill
prevention and control measures. Clean contaminated surfaced immediately following
any spill incident.
Apply fertilizers and pesticides in a manner and at application rates that will not result in
loss of chemical to stormwater runoff. Follow manufacturer's label requirements for
application rates and procedures.
Adjust the pH of stormwater if necessary to prevent violations of water quality
standards.
Assure that washout of concrete trucks is performed off-site or in designated concrete
washout areas only. Do not wash out concrete trucks onto the ground, or into storm
drains, open ditches, streets, or streams. Do not dump excess concrete on-site, except
in designated concrete washout areas. Concrete spillage or concrete discharge to
surfaces waters of the state is prohibited.
Element#10: Control De-watering
Any required de-watering shall be maintained onsite with applicable BMP.
Element#11: Maintain BMPs
Maintain and repair all temporary and permanent erosion and sediment control BMPs
as needed to assure continued performance of their intended function in accordance
with BMP specifications.
Remove all temporary erosion and sediment control BMPs within 30 days after
achieving final site stabilization or after the temporary BMPs are no longer needed.
Element#12: Manage the Project
Inspect, maintain, and repair all BMPs as needed to assure continued performance of
their intended function.
Maintain and update the construction SWPPP.
Element#13: Protect Low Impact Development BMPs
All infiltration BMPs must be protected from sedimentation through installation and
maintenance of erosion and sediment control BMPs on portions of the site that drain
6
•
Stormwater Mitigation Plan and SWPPP 2017
into the Infiltration Trench BMP. If sediment accumulation occurs, restore the BMP to
its fully functioning condition.
Prevent compacting this BMP by excluding construction equipment and foot traffic.
Protect completed lawn and landscaped areas from compaction due to construction
equipment.
Keep all heavy equipment off existing soils of LID facilities that have been excavated to
final grade to retain the infiltration rate of the soils.
Minimum Requirement#3—Source Control of Pollution
All known, available, and reasonable source control BMPs are to be applied to the project.
Source Control BMPs include Operational BMPs and Structural Source Control BMPs. A list of
BMPs to be considered by the project Owner is provided below.
• S407 BMPs for Dust Control at Disturbed Land Areas, Unpaved Roadways, and Parking
Lots
• S411 BMPs for Landscaping and Lawn/Vegetation Management
• S414 BMPs for Maintenance and Repair of Vehicles and Equipment
• S416 BMPs for Maintenance of Roadside Ditches
• S417 BMPs for Maintenance of Stormwater Drainage and Treatment Systems
• S420 BMPs for Painting/Finishing/Coating of Vehicles/Boats/Buildings/Equipment
• S426 BMPs for Spills of Oil and Hazardous Substances
• S431 BMPs for Washing and Steam Cleaning Vehicles/Equipment/Building Structures
Minimum Requirement#4—Preservation of Natural Drainage Systems and Outfalls
Natural drainage systems and outfalls will not be affected by the improvement proposed in this
parking improvement plan. Drainage patterns will not be changed from existing conditions.
The suggested infiltration trench will retain additional peak flows produced by the added gravel
surfacing, helping to recharge onsite ground water conditions.
Minimum Requirement#5—On-Site Stormwater Management
An infiltration trench is proposed for permanent stormwater management of runoff resulting
from the creation of new impervious surfaces by the project. The infiltration trench will rely
upon a combination of infiltration, and temporary retention to mitigate stormwater runoff.
7
�� ��
��� ���� . /
Stormwater Mitigation Plan and SWPPP I 2017
5.0 THE LIMITATIONS OF THIS REPORT
This report has been prepared for the exclusive use of Keith Rasmussen for the proposed site
improvements mentioned herein. The recommendations in the report apply only to the
property that was evaluated and they are not transferrable to other locations. The
recommendations contained in this report are based upon site conditions as they existed at the
time of our studies. During construction, if subsurface or other conditions are discovered that
are significantly different from those described in this report, JCW should be advised at once so
that we may review the conditions and reconsider our recommendations, where necessary.
We recommend that a contingency be established in the project budget and schedule to cover
unexpected conditions.
Within the limitations of scope, schedule, and budget, our services have been executed in
accordance with generally accepted professional engineering principles and practice. This
warranty is in lieu of all others either expressed or implied.
Sincerely Yours,
JC Wilson Engineering, LIC -
Lci , .. ,r ler,_1
c. w^
114 ,,,,,G4insv,
�
'< 8/ON A.--
,c
itin Wilson, PE
�incipa| Engineer
8
• •
Stormwater Mitigation Plan and SWPPP 2017
APPENDIX I
PERMITTING DOCUMENTS
9
0 • , ,
Start Here
1r
Does the site have See Redevelopment
35%or more of Yes Minimum
existing impervious so-
Requirements and
coverage? Flow Chart
Na Does the project convert (Figure 3.3)
v ' acres or more of
Does the project vegetation to lawn or
result in 5,000 t. landscaped areas,or
square feet,or No convert 2.5 acres or more
greater,of new plus of native vegetation to
replaced hard pasture?
surface area?
Does the project
Yes Yes No result in 2,000 square
feet,or greater,of
r - new plus replaced
All Minimum o hard surface area?
Requirements apply
to the new and
replaced hard surfaces ; No
and converted Yes
vegetation areas. yr
Minimum Requirements Does the project have
#1 through#5 apply to 0► land disturbing
the new and replaced activities of 7,000
hard surfaces and the Yes square feet or greater?
land disturbed. —_ -_
No
Minimum
Requirement#2 1
applies.
Figure 2.4.1 —Flow Chart for Determining Requirements for New Development
Volume 1—Minimum Technical Requirements--August 2012
2-10
E 0 •
Does the project result in 2,000 square feet,or more,of new plus replaced hard surface area? OR
Does the land disturbing activity total 7,000 square feet or greater?
•
r
Yes No
I. Minim Requirements#1 through#5 apply to Minimum Requirements#2 ..lies.
the new replaced hard surfaces and the land
disturbed.
Next Question
Does die .ject add 5,000 square feet or more of new h: 4 ces?
OR
Convert% - •or more of vegetation to lawn or Ian. ..._, areas?
OR
Convert 2.5 -or more of native veg' to pasture?
Tea
li,
No
Next
_Y
MI Minimum Requirements apply to theIs this a road
new hard surfaces and the converted I related project?
vegetation areas. Yes
No
L"
Does the project add 5,4 i square feet• more of new hard surfaces? 1
No f
Yes f "
I
__
Do new hard su :. ••d 50%or Is the total o w plus replaced hard surfaces
more to the exi d surfaces 5,000 square f— more,AND does the value
within the 4 ect limits? of the proposed4 •vernents—including
interior improve —exceed 50%of the
assessed value(or rep --nt value)of the
No Year
existing site ha r vemenis?
No addit'
muu No lir
Yes
No ad. '4 nal
________\_______ l*"
All Minimum Requirements apply to the new and
replaced hard surfaces and converted vegetation areas
Figure 2.4.2—Flow Chart for Determining Requirements for Redevelopment
/ ,
Volume 1—Minimum Technical Requirements--August 2012
2-11
• •
CSN
(1)<', DEPARTMENT OF COMMUNITY DEVELOPMENT
to • 621 Sheridan Street,Port Townsend,WA 98368
Tel:360.379.44501 Fax:360.379.4451
Web:www.ca jef`firrsan,wa.usJc mmunit%development
� '1411111°cE-mail:dcd`utco:cffcrson,wa.us
S1Il N(
STORMWATER OPTIONS & GUIDANCE
What is Stormwater? Stormwater is rainwater that runs off hard surfaces like roofs and driveways and needs to be
infiltrated into the soil on-site' before it causes flooding and erosion,which can lead to polluted water and potential
landslides. Erosion can weaken bluffs and slopes,and damage fish habitat like streams,rivers and Puget Sound.
How do I infiltrate the stormwater? There are several easy options to choose from for most residential building
projects. Larger projects usually require engineering.Retaining native vegetation and reducing hard surfaces as much as
possible will reduce stormwater runoff and help you comply with the stormwater code requirements.`'
What is required for my building permit? Keep stormwater in mind when planning your site. The Stormwater
Calculation Worksheet is required for all building projects and stormwater treatment must be identified on your site
plan(see reverse for an example),. During construction, and after,projects must prevent stormwater from leaving the
site(refer to'2.5.2 Minimum Requirement#2:Construction Stormwater Pollution Prevention(SWPP)').
What are my options?
In order of preference from the 2012 Stormwater Management Manual for Western Washfngton,Volume Ill,Chapter 3
"Flow Control Design"(Page 3-2):
Stormwater Best Management
Option Site Conditions Practice(BMP)*Guidance
1 Full Dispersion If the lot is large and has enough retained native vegetation,the BMP T5.30 Full Dispersion
or 65/10 stormwater can be dispersed into the exiting vegetation on-site. This
option is called"65/10"or"Full Dispersion" because 65%of the
native vegetation is retained and not more than 10%of the
development site is converted to hard(impervious)surface.
2 Downspout If the lot can't meet full dispersion,then infiltration may be achieved BMP T5.10A Downspout
Infiltration using a drywell or infiltration trench. Infiltration
3 Rain Garden/ Rain gardens and swales(recessed vegetated stormwater Rain Garden Handbook for
Bioretention infiltration/treatment areas)must be considered when required Western Washington
(>5,000 square feet of hard surface). They are one low impact
development(LID)option that incorporates native vegetation and a
landscape approach to protect and beautify the property.
4 Gutter, The easiest,most common option is to use gutters,downspouts and BMP T5.10B Downspout
Downspout& splash blocks that meet code requirements. This approach provides Dispersion &Design
Splash block less aesthetic and habitat value for the property. Criteria for Splashblocks
*These BMPs are from the 20I2 Stormwater Management Manual for Western Washington.
Other things to consider:
• All infiltration systems must be a minimum of 10 feet from any structure, meet all critical area buffers and setbacks
and be a minimum of 10 feet downgradient of septic drainfields.
• Depending on soils,critical areas,other site constraints and the amount of stormwater your project generates,DCD
may require engineering and/or professionally prepared plans.
• Try our Coaching Service if you have questions or concerns about stormwater on your site.
There are exceptions to this such as a Geotechnical Report reemmendation or where infiltration is not feasible because of poor draining soils.
2 Refer to JCC 18.30.070 and the Slwmarater Management Manual for Western Washington for more detail.
F w 0
Example of Site Plan with Stormwater flow control and drainage elements
TOTfRL ItiPERVIOUS SURFS • 277 Sq. FT.
l"4-' r1t R11+ E'ciSTINte C.ORTOURS Pf,E SFrowr�
_____ammiu135 FEET
4
3r4. -nvE E- -tS E ItqEI)
I t 1., u{•POPE W/ 1•lMLE
STAB L 2E0 OUTLET
i
31$ • - _ _ }
4 S1e�.r
— SEPTlC
RAIN( DEM ofzf*Ir s ft DP,fllt11FlEL.D
$4,Fr,trooSE.
, 285 SQ,FT.
in• ♦4' .
i
Szo '
PRIVA-TE '_.
r ALL 111 RESERVE
I DP,FrAFIEL.D: ',
44.4....PCNX: _
310, r LN CE ' -- _�._ _
FAtt
`"" V ti
RPriN4f►R4EN•I8O std. L
rr. i' ,
cR uas 909 sq.Fr.
K•PIPE Wf -7--< 1
f
'V
_-.`.. _____ ____ + ._ __—._ j_--_- ___._._
--_ ROADSIDE DITCH.
G IPLANNtNG4GRANTS•Apps&Opporfuniies12010 EPA GRANTSh2010 EPA.Watershed CenferiPRCJECT MGMTItask P LasaiordinaneelSWTHandotOtStamwater
Opfrons&Guidance_Finat 3-31-i4
110 • 9
.,,,<<,L-$ON cow DEPARTMENT OF COMMUNITY DEVELOPMENT
621 Sheridan Street,Port'Townsend,WA 98368
'-v '1'c1:360.379.4450 Fax:360.379.4451
Web:www.co.jcffcrson.wa.us/communitydevclopmcnt
tom. .v0: E-mail:dcd(&,co.jcfferson.wa.us
9511 NC3
STORMWATER CALCULATION WORKSHEET
MLA# PROJECT/APPLICANT NAME:
DETERMINING STORMWATER MANAGEMENT REQUIREMENTS:This stormwater calculation worksheet should be completed first to
classify the proposal as "small," "medium," or "large." The size determines whether a Stormwater Site Plan is required in
conjunction with a stand-alone stormwater management permit application, building permit application,or other land use approval
application that involves stormwater review. The basic information will also be helpful for completing a Stormwater Site Plan, if
required.
PARCEL SIZE(I.E., SITE)
Size of parcel 0'78 acres An acre contains 43,560 square feet. Multiply the acreage by this figure.
Size of parcel in square feet 33,881.82 sq/ft
Land-disturbing activity is any activity that results in movement of earth, or a change in the existing soil cover(both vegetative and
non-vegetative)and/or the existing soil topography. Land disturbing activities include, but are not limited to clearing,grading,filling,
excavation,and compaction associated with stabilization of structures and road construction.
Native vegetation is vegetation comprised on plant species, other than noxious weeds, that are indigenous to the coastal region of
the Pacific Northwest and which reasonably could have been expected to naturally occur on the site. Examples include species such
as Douglas fir, western hemlock, western red cedar, alder, big-leaf maple, and vine maple; shrubs such as willow, elderberry,
salmonberry,and salal;herbaceous plants such as sword fern,foam flower,and fireweed.
LAND DISTURBING ACTIVITY, CONVERSION OF NATIVE VEGETATION,AND VOLUME OF CUT/FILL
Calculate the total area to be cleared,graded,filled, Answer the following two questions related to
excavated, and/or compacted for proposed development conversion of native vegetation:
project. Include in this calculation the area to be cleared for:
Does the project convert 3/4 acres or more of
Construction site for structures 300 sq/ft native vegetation to lawn or landscaped areas?
Drainfield, septic tank, etc. 1,500 sq/ft Circle: Yes No
Well, utilities,etc. 200 sq/ft Does the project convert 2'/2 acres or more of
2 630 native vegetation to pasture?
Driveway, parking, roads, etc. sq/ft
Circle: Yes No
Lawn, landscaping,etc. sq/ft
Other compacted surface,etc. sq/ft Indicate Total Volumes of Proposed:
Total Land Disturbance 4 630
sq/ft Cut Fill (cu/yd)
Impervious surface is a hard surface that either prevents or retards the entry of water into the soil mantle as under natural
conditions prior to development. A hard surface area which causes water to run off the surface in greater quantities or at a n
increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces include,
but are not limited to roof tops,walkways, patios, driveways, parking lots or storage areas,concrete or asphalt paving,gravel roads,
packed earthen materials,and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater.
stormwater talc worksheet—REV.10/20/2014
STORMWATER CALULATIONS—IMPERVIOUS SURFACE
NEW EXISTING
Structures(all roof area) 166 sq/ft Structures(all roof area) 2,373 sq/ft
Sidewalks 150 sq/ft Sidewalks 222 sq/ft
Patios sq/ft Patios sq/ft
Solid Decks sq/ft Solid Decks sq/ft
(without infiltration below) (without infiltration below)
Driveway, parking, roads, etc 2,877 sq/ft Driveway, parking, roads, etc 5,513 sq/ft
Other sq/ft Other sq/ft
Total New 3,193 sq/ft Total Existing 8,108 sq/ft
TOTAL NEW+TOTAL EXISTING* 11,301 sq/ft `This amount will be used to check total lot coverage.
The following questions will help determine whether the proposed project is considered development or redevelopment.
DEVELOPMENT v.REDEVELOPMENT
Divide the total existing impervious surface above by the size of the parcel and convert to a percentage: 3 .35%
Does the site have 35%or more of existing impervious surface? Circle: Yes No ✓
FURTHER INSTRUCTIONS: If the answer is yes,the proposal is considered redevelopment and the attached Figure 2 should be used
to determine the applicable Minimum Requirements. If the answer is no, the proposal is considered new development and the
attached Figure 1 should be used. At this juncture, the applicant should refer to the applicable Flow Chart to determine the
Minimum Requirements for stormwater management. DCD staff will help verify the classification of the project and the application
requirements.
For proponents of "small" projects who must comply only with Minimum Requirement #2—Construction Stormwater Pollution
Prevention—an additional submittal is not required. The proponent is responsible for employing the 12 Elements to control erosion
and prevent sediment and other pollutants from leaving the site during the construction phase of the project. Pick up the
Construction Stormwater Pollution Prevention (SWPP) Best Management Practices (BMPs) Packet. Proponents of "medium"
projects—those that must meet only Minimum Requirements#1 through#5—and for"large" projects—those that must meet all 10
Minimum Requirements—are required to submit a Stormwater Site Plan. DCD has prepared a submittal template of a Stormwater
Site Plan, principally for rural residential projects. Complete the template in the Stormwater Site Plan Instructions and Submittal
Template or prepare a Stormwater Site Plan using the step-by-step guidance in the Storm water Management Manual.
APPLICANT SIGNATURE
By signing the Stormwater Calculation Worksheet,I as the applicant/owner attest that the information provided herein is true and correct to the
best of my knowledge. I also certify that this application is being made with the full knowledge and consent of all owners of the affected
property.
(LANDOWNER OR AUTHORIZED REPRESENTATIVE SIGNATURE) (DATE)
FOR OFFICE USE ONLY
SMALL MEDIUM LARGE REDEVELOPMENT Stormwater Site Plan: Yes No
stormwater calc worksheet—REV.10/20/2014 2
• •
Stormwater Mitigation Plan and SWPPP 1 2017
APPENDIX II
DESIGN DOCUMENTS & BASIN MAP
10
• •
MEMO
Jcw
JC Wilson Engineering&Consulting,LLC
Innovative-Practical-Strategic DATE: MARCH 13, 2017
2245 Broadway Ave
North Bend, OR 97459
Cell#208.553.6742
jcwilsonengineering@gmail.com
TO: John Fleming PE
Engineer III
Jefferson County Public Works
623 Sheridan St
Port Townsend, WA 98368
360-385-9217
jfleming@co.jefferson.wa.us
FROM: Justin Wilson, PE, Principal Engineer/Owner
JC Wilson Engineering Et Consulting, LLC
RE: RESPONSE - 3/10/17 Application Comments - APN 900-113-011
This memo are responses to the eitht(8) comments outlined in your 3/10/17 email.
1) The proposal is incomplete.
Information will be added and re-compiled to help make the updated application complete to Jefferson
County standards.
2) There are 2 Stormwater Calculation Worksheets: one signed 1/31/2017 by Simon Little attached to
the building permit: The other unsigned, not dated, and not completely filled out that came with the
stormwater proposal. The surface area numbers do not match. From the site plan, it appears that
there is approximately 7000 sf of new gravel parking area. If so, Minimum Requirements #1-#9 may
apply which includes the need for treatment. Neither of the calculation worksheets show this
magnitude of new gravel parking area. Recommend labeling the surface area of each building and
other impervious surfaces on site plan for clarity of understanding.
The measured area of the proposed gravel hatching measures 5,394-sf. The area of existing gravel
surface that proposed gravel overlaps is 898.7-sf. There is a net area of (5,394-899) 4,495-sf.
Minimum Requirements #1-#5 should apply to this project. A basin map exhibit with labeled areas
will be included with updated application
3) The site is proposing to use infiltration. According to the SWMMWW, all infiltration BMP's
require on-site soil verification for design. Soil survey information provided is not acceptable. On site
soil test pits are required in conformance with the applicable section of the SWMMWW amended in
2014 for the selected BMP that show ample vertical separation, soil texture, compaction, structure,
similar to those performed when evaluating a site for on-site sewage dispersal system design. Since the
! i
proposed location is adjacent to the parcel to the north, verification of horizontal separation from the
neighbor's well and drainfield should be provided.
A septic soil evaluation for parcel 901-113-011 is included with this memo, and will be included with
an updated application. This information is consistent with the NRCS/USDA soils information that
was utilized for preliminary and final design considerations.
4) There are no sizing calculations provided to justify the infiltration trench size.
The design criteria for an infiltration trench prescribed by WADOE is included with this response and
will be included with updated application. This shows that this site should have between 20-30' of
trench used for every 1,000-sf of impervious area added. Treatment and hydraulic analysis is not
required for a medium size project. From my experience, this is a much more conservative
approach than analyzing runoff using single event or continuous simulation hydrology.
5) According to the topographic lines on the site plan, the location &size of the infiltration trench
does not intercept all of the impervious surface run off
The proposed design will pick-up almost all runoff from existing AND proposed surfacing on north
side of property. This design was considered for the purposes of not having any stormwater runoff
leave the property. The very high infiltration characteristics of existing soils (group A) will also help
to assure that all onsite runoff is infiltrated, and no transport of sediment off this site should occur.
6) There is no proposal,for sedimentation control between the parking area and the infiltration
trench.
There will be small area of landscaped area between the parking lot and infiltration facility to help
trap sediment. It is also proposed in the infiltration trench detail to have filter fabric installed a few
inches below top of the infiltration trench to keep sediment out of the facility. A maintenance
schedule to keep this fabric clean will be included with the updated application. The 20-ft of grass
strip that WADOE suggests is a recommended design, but should not be directly applied for approval.
Every project site is unique, and should be treated as such, so that designed elements will work as
intended. We spoke about this at length when I was part of the group that that gave
recommendations to implement LID in Jefferson County several years back with David Johnson and
several others in the design community.
7) The layout of the infiltration trench is along an existing grade that changes 3'to 4'vertically'. A
profile drawing that includes the existing grade, the infiltration trench& its level bottom, and how it
meets vertical separation requirements by showing soil test pit strata would clarify how the proposal
can be constructed and conform to the SWMMWW amended in 2014.
The updated Application with show a flat bottom trench proposed for the "Medium" size project.
The trench shall be 3-ft deep at the low end, and depth shall be adjusted for the trench going west.
Again, the topographic information is taken from geomorphic data, and is used to get a good sense of
existing drainage patterns when a detailed topographic survey is not available.
8) The general construction notes on sheet 1 of the plans keep referring to the City of Port Townsend
and the City of Port Angeles, and the City Engineer. This project is located in Jefferson County.
The notes on sheet will be updated to correctly refer to Jefferson County in the updated
application.
2
• 4:
• .0fUtiW cr”. '
411
, than Septic Design Inc.
4 a Cleaver
:Contractor Registration#: NATHACS94002
Soil Logs
Keith Rasmussen, Managing Member
Re:
CHIMACUM SPACEPORT, LLC
901-113-011
Parcel#:
I
Sec: 11, Township: 29N, Range: 1W
/ Soil Logging done on 19 OCT 2016 by Nathan Cleaver
Soil Log#1
I
0 - 2" DUFF
2 - 16" DISTURBED VERY GRAVELLY MEDIUM TO COARSE SAND
16-56" VERY GRAVELLY MEDIUM TO COARSE SAND
NO COMPACTION
f
Soil Log#2
0 - 2" DUFF
2 - 54" VERY GRAVELLY MEDIUM TO COARSE SAND
NO COMPACTION
Soil Log#3
0 - 2" DUFF
2 - 54" VERY GRAVELLY MEDIUM TO COARSE SAND
NO COMPACTION
Please feel free to call with any questions.
Thank you,
Nathan N. Cleaver
Licensed Onsite Wastewater Treatment System Designer.
, r
k t 1
• •
least 1 foot below the expected bottom elevation of the infiltration trench or dry
well.
Identify the NRCS series of the soil and the USDA textural class of the soil horizon
through the depth of the log, and note any evidence of high ground water level,
such as mottling.
4. Downspout infiltration is considered feasible on lots or sites that meet all of the fol-
lowing:
. 3 feet or more of permeable soil from the proposed final grade to the sea-
sonal high ground water table.
• At least 1-foot of clearance from the expected bottom elevation of the infilt-
ration trench or dry well to the seasonal high ground water table.
. The downspout full infiltration system can be designed to meet the minimum
design criteria specified below.
Design Criteria for Infiltration Trenches
Figure III-3.1.2 Typical Downspout Infiltration Trench (p.455) shows a typical downspout
infiltration trench system, and Figure III-3.1.3 Alternative Downspout Infiltration Trench
System for Coarse Sand and Gravel (p.456) presents an alternative infiltration trench sys-
tem for sites with coarse sand and cobble soils. These systems are designed as spe-
cified below.
General
1. The following minimum lengths (linear feet) per 1,000 square feet of roof area
based on soil type may be used for sizing downspout infiltration trenches.
Coarse sands and cobbles: 20 LF
Medium sand: 30 LF
Fine sand, loamy sand: 75 LF
Sandy loam: 125 LF
Loam: 190 LF
2. Maximum length of trench shall not exceed 100 feet from the inlet sump.
3. Minimum spacing between trench centerlines shall be 6 feet.
4. Filter fabric shall be placed over the drain rock as shown on Figure III-3.1.2 Typical
Downspout Infiltration Trench (p.455) prior to backfilling.
5. Infiltration trenches may be placed in fill material if the fill is placed and compacted
under the direct supervision of a geotechnical engineer or professional civil
2014 Stormwater Management Manual for Western Washington
Volume Ill- Chapter 3- Page 453
•
engineer with geotechnical expertise, and if the measured infiltration rate is at least
8 inches per hour. Trench length in fill must be 60 linear feet per 1,000 square feet
of roof area. Infiltration rates can be tested using the methods described in Section
3.3.
6. Infiltration trenches should not be built on slopes steeper than 25% (4:1).A geo-
technical analysis and report may be required on slopes over 15 percent or if loc-
ated within 200 feet of the top of slope steeper than 40%, or in a landslide hazard
area.
7. Trenches may be located under pavement if a small yard drain or catch basin with
grate cover is placed at the end of the trench pipe such that overflow would occur
out of the catch basin at an elevation at least one foot below that of the pavement,
and in a location which can accommodate the overflow without creating a sig-
nificant adverse impact to downhill properties or drainage systems. This is inten-
ded to prevent saturation of the pavement in the event of system failure.
Design Criteria for infiltration Drywells
Figure III-3.1.4 Typical Downspout Infiltration Drywell (p.457) shows a typical downspout
infiltration drywell system. These systems are designed as specified below.
General
1. Drywell bottoms must be a minimum of 1 foot above seasonal high ground water
level or impermeable soil layers.
2. When located in course sands and cobbles, drywells must contain a volume of
gravel equal to or greater than 60 cubic feet per 1000 square feet of impervious sur-
face served. When located in medium sands, drywells must contain at least 90
cubic feet of gravel per 1,000 square feet of impervious surface served.
3. Drywells must be at least 48 inches in diameter(minimum) and deep enough to
contain the gravel amounts specified above for the soil type and impervious sur-
face served.
4. Filter fabric (geotextile) must be placed on top of the drain rock and on trench or dry-
well sides prior to backfilling.
5. Spacing between drywells must be a minimum of 10 feet.
6. Downspout infiltration drywells must not be built on slopes greater than 25% (4:1).
Drywells may not be placed on or above a landslide hazard area or on slopes
greater than 15%without evaluation by a professional engineer with geotechnical
expertise or a licensed geologist, hydrogeologist, or engineering geologist, and
with jurisdiction approval.
2014 Stormwater Management Manual for Western Washington
Volume Ill- Chapter 3- Page 454
• •
5. Prepare a Permanent Stormwater Control Plan
6. Prepare a Construction Stormwater Pollution Prevention Plan
7. Complete the Stormwater Site Plan
8. Check Compliance with All Applicable Minimum Requirements
The level of detail needed for each step depends upon the project size as explained in
the individual steps.A narrative description of each of these steps follows.
1-3.1.1 Step 1 - Site Analysis: Collect and Analyze
Information on Existing Conditions
Site analysis results shall be submitted as part of an Existing Conditions Summary and a
site map within the Stormwater Site Plan submittal (see Step 7). Part of the information in
this step should be used to help prepare the Construction Stormwater Pollution Pre-
vention Plan. The authorized project reviewer for the local government with jurisdiction
may chose to waive certain components required in this section as appropriate.
Purpose of the Site Analysis: Low impact development site design is intended to com-
plement the predevelopment conditions on the site. However, not all sites are appro-
priate for a complete LID project, as site conditions determine the feasibility of using LID
techniques. The development context shall be established by an initial site analysis con-
sistent with the requirements of this section.
The initial inventory and analysis process will provide baseline information necessary to
design strategies that utilize areas most appropriate to evaporate, transpire, and infiltrate
stormwater, and achieve the goal of minimizing the pre-development natural hydrologic
conditions on the site.
The site analysis shall include, at a minimum, the following information
for projects required to meet Minimum Requirements 1 - 5:
1. A survey prepared by a registered land surveyor(or other qualified professional)
showing:
. Existing public and private development, including utility infrastructure on
and adjacent to the site if publicly available,
• Minor hydrologic features, including seeps, springs, closed depression
areas, drainage swales.
• Major hydrologic features with a streams, wetland, and water body survey
and classification report showing wetland and buffer boundaries consistent
with the requirements of the jurisdiction.
2014 Stormwater Management Manual for Western Washington
Volume I- Chapter 3-Page 78
•
Note that site visits should be conducted during winter months and after sig-
nificant precipitation events to identify undocumented surface seeps or other
indicators of near surface ground water.
. Flood hazard areas on or adjacent to the site, if present.
. Geologic Hazard areas and associated buffer requirements as defined by the
local jurisdiction
. Aquifer and wellhead protection areas on or adjacent to the site, if present.
• Topographic features that may act as natural stormwater storage, infiltration
or conveyance.
Contours for the survey are as follows:
Up to 10 percent slopes, two-foot contours.
• Over 10 percent to less than 20 percent slopes, five-foot contours.
• Twenty percent or greater slopes, 10-foot contours.
• Elevations shall be at 25-foot intervals.
2. A soils report prepared by a professional soil scientist certified by the Soil Science
Society of America (or an equivalent national program), a locally licensed on-site
sewage designer, or by other suitably trained persons working under the super-
vision of a professional engineer, geologist, hydrogeologist, or engineering geo-
logist registered in the State of Washington. The report shall identify:
a. Underlying soils on the site utilizing soil surveys, soil test pits, soil borings, or
soil grain analyses (see http://web-
soilsurvey.nres.usda.gov/app/HomePaqe.htm for soil survey information).
b. The results of saturated hydraulic conductivity (Ksat)testing to assess infilt-
ration capability and the feasibility of rain gardens, bioretention, and per-
meable pavement. Testing should occur between December 1 and April 1.
Use small-scale Pilot Infiltration Tests (PIT), or other small-scale test accept-
able to the local jurisdiction. Grain size analyses may substitute for infiltration
tests on sites with soils unconsolidated by glacial advance.
Note: The certified soils professional or engineer can exercise discretion con-
cerning Ksat testing if in their judgment information exists confirming that the
site is unconsolidated outwash material (high infiltration rates) and there is
adequate depth to ground water(1 foot minimum from bottom of a rain
garden, bioretention, or permeable pavement installation).
c. The results of testing for an hydraulic restriction layer (ground water, soil
layer with less than 0.3 in/hr Ksat, bedrock, etc) under possible sites for a rain
garden, bioretention facility, or permeable pavement. Testing with a
2014 Stormwater Management Manual for Western Washington
Volume I- Chapter 3-Page 79
• • t )
Q
nce
- O H
ac c) c = a cn
c 1
- ; E c c a) o _ o y c
d y r O t4 O O O N O. tt
a)
' .Q O Cl.) a) y .Q
Z y l c a) o @ ca o o i E
0 V, a) a) ..-
to O @1- O O i8iLfl ;
Qa co 3 O co cA a) co o a) a `o v
la cn o c
� O u0i @ H @ U c>,', �O p y c ' d `\ p O
C co crJ
c.)i .@ o U a X c E E o- m aa))al aa) a0i cA
O2 0 2 C il 0 uu) • . cL ce a
a.+ a)
L -o 0) coi
4.1 a) € c O c 0 -O 7 O
'O s O C -p c c (6 a) a
C a) C' • - T o o I E vi m a) c o
Z E o o TV a) �C 0 � c0 ( N o p
— I :� — c w -- N (6 AI O -O O O)' V uu
7 as^• • o C 3 E ? o ! vi 3 - a)co o) ' 3
N C R C w U O d -O -D U 0 O V 0- a.'y
C •fC C > d co en c L N c - y CO
as U E o a) a) o o CA a) ° 'c •c a)
..', t ca E o rn s
O C Ln ca U d y U O (6 . . ii r-� O 45 ti C .O -o 4.'
L @t 0 O 0 c9 ua))cu a) cO m E a) N Cl) c a o gg
O 3 E �i c c c6 c vi v E o �i
N 0 a) O C d a) 7 O O .c y a) OV N j O
C) c ° ) D a) E -o o. o- o —s a)
W IS O N `- c Ea) .p_ L y O 'n c
o ; U c .— m 3 7 (0 Q O r U O c a) c03 o (U`0 c m N 'Ln N c
4-0
U < "D 4C2 > u) • . 1 < V d co 0 -D cA -1 ^ N
O >
a i oC
Ca) ( N ami
io y c { ca v o
N 10 c co I - N t'_,
y j Q w a)
c � co a
as 17) d cj a .. 0
cii
2 toIC
H• LI. ms
a) :Es' ,
V0 L a) E0.
C c �� o
to y v
C E c c bp.E v
N c o
�
pv a
, d V
wm c c Q < Q a0 Q � �o
E
c — — i >> 3
IL Lm C L J
co N
y [G a..' O
N e m 5 c
co
a) d
n▪s Rc
1' = o c ac
3 )
c V Q C ,�
2. m cLi ° o) I • u E v
O' $ c w E s o a E E
E' c=i o) = u) c
O L' 4- N (0 �e ' .., c c'.9 o
✓ y amici ami o p o y "' °;
-1C 1 (VO , c v� N a) vs a N cc0
v G t °) d O ci c
O O c6 ,°- 'a d O > .7
, , S 0
_ 2 IA
- � � \ /
\ f - ) U 2 °
27. \ a o @D c a
� ■. Bf ® �wo) . a) c
§ z� LE / \
. /
VI iM 1 0 � ° ' � u - � k
v, 0O. E k 8 7 / \ MI k
C 1 AI E £ co ecou cu
\ � , a - x / 8 « 0.
IC ( 1 \ k \ / 0 7
7 ix o r ix / 2 a ix 2 \
t : — -- � 2 a)
2 k /
o \ C
O.vt a) . a §
o C §o . ) 7
in
a 2 !
z . C Of /
2 ) 3 E E I 2on
vi CU /� f 25 n
§�
2 c c § � \
U 2 - 2 ■ -o �
o § E 5-c
a 2 E@ a 2 � E
-0 ) % >' �t
C m o = Q aIn k
■ . . .. ..
> J _
_ e7
I- . § < � ))
2 cC f� 4
■ u !
(n % / k�: ' #$
cu £ rt. ; \
c 0
GI - \�
C 2 $
ctcl a)
k-c
E § Sf
0 — R §
me 2, \ < « « < §
§ , c k7
E §k
C Felx
U cok
>.a
2 � � 1
f <C
I- I a < E <
E
k �� ac
0 E \ /vi
/ < /
i (
• •
iiient and illateddis
Table 15 includes recommendations for equipment and materials commonly used to maintain
downspout full infiltration systems.
Table 15. Downspout Full Infiltration System Equipment and Materials List.
Pipe/structure system inspection and Weed/vegetation removal equipment,
maintenance equipment such as:
❑ Hand tools El Weeding tools
O Flashlight 0 Weed burner
❑ Mirror(for viewing pipes without entering 0 Buckets
structure) Equipment to clear accumulated sediment
❑ Garden hose from sump
❑ Plumbing snake ❑ Shop-Vac
❑ Shovel
Skip
The skills required for the maintenance of
downspout full infiltration systems are listed Skills Needed for Main
in the text box to the right. of Downspout Full Infiltration,
Systems
• General drainage system maintenance skills
(e.g., inlet/pipe cleaning experience,
inlet/pipe maintenance or repair experience)
• Landscape or drainage contractor for major
maintenance
HERRERA
July 2013 V
Guidance Document—W.Washington Low Impact Development(LID)Operation and Maintenance(OEM) 71
,
-ls olanls 0 ZIL4ESSles0d ,WO!,el.n
`dM `WnovonHo W�OWLSNO" 'NINON
.�
��aOW�H I '8 O�� �Hl 911 oNll�nsNoO M'N.84NOS30 o%[ suannoa.r v x CO
8 ON1H33NION3
dWi NIS` E1 NOSIIMOf Nasal N.
LW L mor WHO-31111,0...tsco,No.mo xams_mroumo
R
oze 2 4 IIIII II 1111 li 142
X .- trg
•
o 11 1 1 1 II II II I a i li'mou" a o
_ II I I 1 1 1 1 1 1 11 8 : 0 -$za o m
Fig/ 54; c.c o. 03 0
te _____
I I 6-- ..§A.,,..8111
L_____
— 0� x
Wim,
. , 1IR
I a I*
�I CL uag1, Q rig y<
gig. ,I CC €.,,.
Wnn I ,F gt 9 O $ 4
ai28 I o. --- a gn'F
Ill
�r I \ ` 1\
x II N \\\
I1� N
/1 ��' �J \
- § lial ':::.,P--'-- ov N-/--- .
z � N
4
U) rye' I
_ Q
CO +
/
• .. • y
1.r,` !':2< ,`ma I ' , / U
i
ofs `� .,--->:-f: U =1 \ I Y
: •
_ }
r •.i,: Prj..l
;, .;; z.::.: .,
;
- ;�a .)•.. / 4 z t ��''! §1 31311i 111;'
� .,: i' / *��/ gi s E ? 3 a F'°of ti s
r • I .;�1 P: 21 0,€2 a 2 E 61_ .� -It gS lL 5
/ 3' o Tia ' ;11-.
s 8s 6 iI
_ '` =<7: / is s'' 1„ )Q§ p k y a 's1 El s
, ier aIli • • 118 ay d iiII! ,Iligi i
I' '1` i �' � LL€ye'S r
/I
f
a: 1 . I a l t 1 s . s I , I c I e I I
• •
Stormwater Mitigation Plan and SWPPP I 2017
APPENDIX III
SOILS REPORT
11
. f • !
USDA United States A product of the National Custom Soil Resource
Department of Cooperative Soil Survey,
Agriculture a joint effort of the United Report for
RC(('' States Department of
� `t AgrietJefferson County
1llLL ..11 Federal agencies, State
Natural agencies including the Brea, Washington
Resources Agricultural Experiment
Conservation Stations, and local
Service participants
x
visokir
4 ,, v „ „fib - ,r .., r A°:n. e��
..:0..., .,14,7i . v.. . ' ,,..`,;.„ ' '''. '!''•)40' ..1.';:*!..,* 44;'L.4%,,le.4 '‘,1.4'. , , *.„ ,...;-!,.,.. -;:-.4.4-;,:...,. ..-'..".
?t s
l /
"apt
f ,•;-,1,1:--',„,e4' _R,3. w 'a;,' ,w+! ° z• t .f t y,,/,4 //:.$400 fl��A ."';2•;:,„:4....‘;',:,,,‘"ry
r 7a:, t .j ‘,.,:::,..,...ii.,,,ter' - n ,,, " ' r E / ;.
1,7
, 3 t• ,,ll ,ii- .• M- ,'', ' . ''.,','''''1,4.) 'P{,'���� a,.;/.i � ,',w� .,
^*rr•;f4 4 i t 'ti• *t9 `, j • kr £ ,y., .{,'W' s
•
s1,' ,t't { .. fl f ;G ,i,, .Cyt.„,t1'14;04./J ,,,f0..-1..‘?"' 4
'�S 6- Ati i 7.‘,"-.:,
7. D ryMfi�i;,t.L qt -'yt; - }•�xi
^������ �.s:sf� y ','A 'v f�.mak"' „,,,,;,,,,,.:.-..-,:A-,:.;‘, ., �t ”'
• • d "" :i } ?� 3 as s 4
n' x
tF7
} ' 442* 44 c ti it 7,-.
,, m.
4,Y '+ y /,,,,e;1...,
v n
•
gg • .
V....-m.•..+.-.a.+.+s_.�' =.t?t„,U; s,"`. _ ;N " 'A., ay.tw ',C' .A4•--
• k� I I I I I I I 8 00$ ft .f � �
'w� `A $:. °' ,0#4,:.'",,,,, t
January 27, 2017
• .
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist(http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
•
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or(202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
S •
Contents
Preface 2
How Soil Surveys Are Made 5
Soil Map 8
Soil Map (1291 Chimacum Rd.) 9
Legend 10
Map Unit Legend (1291 Chimacum Rd.) 11
Map Unit Descriptions (1291 Chimacum Rd.) 11
Jefferson County Area, Washington 13
Bk—Belfast silt loam, wet variant 13
CeB—Casey silt loam, 0 to 8 percent slopes 14
SaB—San Juan gravelly sandy loam, 0 to 8 percent slopes 14
SuB—Swantown gravelly loam, 0 to 8 percent slopes 15
Soil Information for All Uses 17
Soil Properties and Qualities 17
Soil Physical Properties 17
Saturated Hydraulic Conductivity (Ksat) (1291 Chimacum Rd.) 17
Soil Qualities and Features 20
Hydrologic Soil Group (1291 Chimacum Rd.) 21
Water Features 24
Depth to Water Table (1291 Chimacum Rd.) 24
Soil Reports 29
Soil Physical Properties 29
Engineering Properties (1291 Chimacum Rd.) 29
References 34
4
• s
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
•
Custom Soil Resource Report
scientists classified and named the soils in the survey area,they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
6
• •
Custom Soil Resource Report
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
7
• •
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
• 41111
2 2
c
0ZO9LES 096L LES 066L LES 005/LES 09BL1£S OZHLI£S OBLLLES ObLLLES
AA,Es Sb.ZZI c - - 0M ES,Sb oZZT
.L773
<511
N
0.
O O
„..',7-
Y
r
r-'
* yid.. p
L M
Ofx
/ ,,��:.
}�_ �s
Ill 0
L E .-. +
cn
CI) U
---;10,:w
Taal 0
• Z
0 - '
oE 2-
y 4♦ r 3o
( •
j rs
.a�L Rd
4' ChTmacum
O y. .s. x v o 06
z
. . rya -QQ
a
f µx m S
Q:
M ,_Y ly ,e', u
R -' x
O' tYT ,, ,',,-:',7-2,,„,„.,,,, �ebh'/lA�R!Ifwi ' ifqkCV
yANiii A 4 �' .ss a,. �.<. r ■■1 § Yt
Col ro
4$ T .r> >ssa.' ?� wy4zs fA''','"....'4 u.u
1 f f xZ
M�,S1,9b oZZT .• z s
it
0
7, M„ST,96 oZZI
oZ08LES 096/LES MLLES 006/LES 09BLLES OZBLIES OBLLL£S I
06LLLES
2 2
C
0 . , ,
u) cci
_ O 8 O co N
a) 0 .a) TO .c co co a)
7 N r 0 0 N co N O a) .O
Hil
I !1Ih
O - G) QO. to R a) C U E f O N a) m 0c co_U L EO E N n N f6 W .-. N (/) vJ a) 0 u1
U C E c L 2 M C 0 0 0 Ct R �O L... ...:C
a) m E Ca 3 co a) o O L en P. a 2 Z c° y L E N o
< U
3 rL-. O .L-. L N C d a) N 7 f0 Q `7 N 0 l L O `) N
• QO m To E U uJ ) 0QL ,_ Qb a 3wf0a)
N U CO t N V u) , O C u) 7 w N O O Q >.
LL O _ H E to L co co @ C O N j (n f0 • O-. uj co
O > > .LO o o a) °� >.N c .= 0 w 0 O )ri 0 0• > m E
LL a) a) —_ c > c O a) a) U c E O U L n
Z N L C (a O L O 0 2 2 a m m O L c c co 0_ N R E N
Q. >,
N 7 U) U 0 y .1= -0 00 N t0 L O O
E c m� n� v CO en tea? m � 13 a`) 22uc
Q 0 co u) .L.. E U co o V) 7 J w -r, y N > d u) L-0 ' 0
C Ca E 0.0 0 -}-,•:, L R a 0 C d N O O N O
C .0 n R O C - a) Z O E 0 0- co co O O 2 N ' -O C
u) co E C F 0 L-. >.a) L `7 2@ O)(a f0 @ co p) E O T 7
a.
d - O C •C .O c .6 0 2 T a) L R CO U y C O O .y. '- 0 -O (O R
2 O C co O a' O O 7 +- 3 C a7 V O Q co 'C N L C n
U) a) yr E o) • E _ a) E m 0 w y ,- = `O C O_CO•w E
N •O O) E a) U C N a))co a) 0 O C O 0 a) y a) 2 a) 2 a O.O CO .c 0 a O
u) O .` D n c aj t0/) f0/) U "O 0 U c N " O-a) (n a) E O may-' O .n O coc
a) co _0 a) c�a co R 0 n 0 O.4) R a) V u).0 — 2 — — a) E m
L N __co c C O U a) a) O a>) O R O Y L_ U E — O 7 O fa O L O L
H — > W E— O 0 a E V)> O 2 t1'O Q co H O (n V) (n.— O N H U� u)
r
0
Q
a)
EY
a)
U
3
0
to O
N
EY
O m
(.0u, n
E m c m a
L
O a LL () .0 m
U) U) a) v rn to .n
= TS aC a
LO
U NnpO JN N JO O a< u) n
nCn (n N E N r'_) O O To
cu''-' m L n w aR c R N U R _n i > Oto I' in o 7
�
v
Q c
m
/1
a3 O O
`f; a
N
LLJ ` N R 4 R
0 3 I.L. m
W
—J
O m 45 a
Q Q T 0) C
C _ 2 o
co
0O c O OC N d Jd ` E ` 3 R 0. O. . . u) O a Ro 2OOO
a)
•
0.
Ll.i
n
Cm7 D 7 5 a O) .- U N O aE0 n a it
~
77
n n n d T o 5 to a) °-
4.'
Q _O co ca Al 2 5 nteLO 0 aT2 LOr2 2 LL O 2 T N > Si 0 R N a) 8 C - •C 10 I 5 0., ._g
NR 5 .Q .O ' O OR O R R 2 N CN aOR co a5a OW Q UM M 'Q m co U U 0 0 J
J 2 2 2 a 2' N co M U) (n M
2 0.
c o
co LA r ® a
ra % )n
a
In
• •
Custom Soil Resource Report
Map Unit Legend (1291 Chimacum Rd.)
Jefferson County Area,Washington(WA631)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
Bk Belfast silt loam,wet variant 3.2 16.5%
CeB Casey silt loam,0 to 8 percent 0.5 2.4%
slopes
SaB San Juan gravelly sandy loam, 15.5 79.3%
0 to 8 percent slopes
SuB Swantown gravelly loam,0 to 8 0.3 1.7%
percent slopes
[Tota[Totals for Area of Interest 19.6 100.0%
ls
Map Unit Descriptions (1291 Chimacum
Rd.)
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
11
• •
Custom Soil Resource Report
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them.Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
12
•
Custom Soil Resource Report
Jefferson County Area, Washington
Bk—Belfast silt loam, wet variant
Map Unit Setting
National map unit symbol: 2gg1
Elevation: 30 to 980 feet
Mean annual precipitation: 50 to 70 inches
Mean annual air temperature: 50 degrees F
Frost-free period: 170 days
Farmland classification: Prime farmland if drained
Map Unit Composition
Belfast variant, wet, and similar soils: 95 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Belfast Variant,Wet
Setting
Landform: Flood plains
Parent material: Alluvium
Typical profile
H1 -0 to 9 inches: silt loam
H2-9 to 20 inches: silt loam
H3-20 to 60 inches: stratified gravelly fine sandy loam to clay loam
Properties and qualities
Slope: 1 to 2 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Poorly drained
Capacity of the most limiting layer to transmit water(Ksat): Moderately high (0.20
to 0.57 in/hr)
Depth to water table: About 6 to 12 inches
Frequency of flooding: Occasional
Frequency of ponding: None
Available water storage in profile: High (about 10.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 5w
Hydrologic Soil Group: C/D
Other vegetative classification: Wet Soils (G002XN 102WA)
Hydric soil rating: Yes
Minor Components
Belfast
Percent of map unit: 5 percent
Hydric soil rating: No
13
•
Custom Soil Resource Report
CeB—Casey silt loam, 0 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2gq9
Elevation: 0 to 390 feet
Mean annual precipitation: 30 inches
Mean annual air temperature: 45 degrees F
Frost-free period: 60 to 200 days
Farmland classification: Prime farmland if drained
Map Unit Composition
Casey and similar soils: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Casey
Setting
Landform: Terraces
Parent material: Glacio lacustrine deposits and/or marine deposits
Typical profile
H1 -0 to 17 inches: silt loam
H2- 17 to 33 inches: clay
H3-33 to 60 inches: stratified loamy fine sand to clay
Properties and qualities
Slope: 0 to 8 percent
Depth to restrictive feature: 10 to 20 inches to abrupt textural change
Natural drainage class: Somewhat poorly drained
Capacity of the most limiting layer to transmit water(Ksat): Very low(0.00 in/hr)
Depth to water table: About 12 to 24 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Low(about 3.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3w
Hydrologic Soil Group: D
Other vegetative classification: Seasonally Wet Soils (G002XN202WA)
Hydric soil rating: No
SaB—San Juan gravelly sandy loam, 0 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2gt2
14
• •
Custom Soil Resource Report
Elevation: 0 to 300 feet
Mean annual precipitation: 18 to 30 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 210 to 250 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
San juan and similar soils: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of San Juan
Setting
Landform: Plains
Parent material: Glacial outwash
Typical profile
H1 -0 to 17 inches: gravelly sandy loam
H2- 17 to 60 inches: gravelly coarse sand
Properties and qualities
Slope: 0 to 8 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Somewhat excessively drained
Capacity of the most limiting layer to transmit water(Ksat): High to very high (5.95
to 19.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Low(about 3.7 inches)
Interpretive groups
Land capability classification(irrigated): None specified
Land capability classification (nonirrigated): 3s
Hydrologic Soil Group: A
Other vegetative classification: Droughty Soils (G002XN402WA)
Hydric soil rating: No
SuB—Swantown gravelly loam, 0 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2gtb
Elevation: 0 to 690 feet
Mean annual precipitation: 18 to 35 inches
Mean annual air temperature: 50 degrees F
Frost-free period: 210 to 230 days
Farmland classification: Not prime farmland
Map Unit Composition
Swantown and similar soils: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
15
• •
Custom Soil Resource Report
Description of Swantown
Setting
Parent material: Till
Typical profile
H1 -0 to 5 inches: gravelly loam
H2-5 to 13 inches: very gravelly loam
H3- 13 to 22 inches: very gravelly sandy loam
H4-22 to 60 inches: very gravelly sandy loam
Properties and qualities
Slope: 0 to 8 percent
Depth to restrictive feature: 20 to 30 inches to densic material
Natural drainage class: Somewhat poorly drained
Capacity of the most limiting layer to transmit water(Ksat): Very low to moderately
low(0.00 to 0.06 in/hr)
Depth to water table: About 6 to 12 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Very low(about 2.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: D
Other vegetative classification: Wet Soils (G002XN102WA)
Hydric soil rating: No
16
i !
Soil Information for All Uses
Soil Properties and Qualities
The Soil Properties and Qualities section includes various soil properties and
qualities displayed as thematic maps with a summary table for the soil map units in
the selected area of interest. A single value or rating for each map unit is generated
by aggregating the interpretive ratings of individual map unit components. This
aggregation process is defined for each property or quality.
Soil Physical Properties
Soil Physical Properties are measured or inferred from direct observations in the
field or laboratory. Examples of soil physical properties include percent clay, organic
matter, saturated hydraulic conductivity, available water capacity, and bulk density.
Saturated Hydraulic Conductivity (Ksat) (1291
Chimacum Rd.)
Saturated hydraulic conductivity (Ksat) refers to the ease with which pores in a
saturated soil transmit water. The estimates are expressed in terms of micrometers
per second. They are based on soil characteristics observed in the field, particularly
structure, porosity, and texture. Saturated hydraulic conductivity is considered in the
design of soil drainage systems and septic tank absorption fields.
For each soil layer, this attribute is actually recorded as three separate values in the
database. A low value and a high value indicate the range of this attribute for the
soil component. A"representative"value indicates the expected value of this
attribute for the component. For this soil property, only the representative value is
used.
The numeric Ksat values have been grouped according to standard Ksat class
limits.
17
•
i
2
Z
a
07119LES O9fiLLE5 066LLfS OOfiLL£S 098LLES OZBLLES 322/LES ObLLL£S
M„ES 54 oZZT r„ M,SES S17aZZT
r
`,r' i fr.+r; • ue
f
ra x,, nra f ,:
Y. •[i ✓ f //'"'far'-,,,,,,e''',.,:',f'" u]
u] d,�/f JJ' //
coo
„�'
L 0 p -ter „a r i2
N ,, 2
w
s
ry d � „ vrz
op
MINZ5
U
RA
LI
d kx
#% 5
2
r, a
n 1
5
0
oL'I g
•r
_ "iii✓`..', 'milievi ,,, ',-:,-`. $ "',i �n
LI
r .r r;,�. `
g �
M ST 9b oZZL in ice,"' f”' h M„ST 9b aZZT
07ABlES
096L MS
066LLES OOfiLLES 098LLES 0Z9LlES OBLLLES ObLLLES
En
z z
v
k
• •
CO 00-
-10 O 0.)
CO N
a) 0 _ ca c0 0) a)
7 w CU
N 0 O a
NQ0 a) a) aa
0) I y
CU • 2 CO a0 c U 0 _a C U y y 1:11
oE 0 N C EOo m O E a) o i3 N -Q ;Co
_
N 0)Co N E O c y a.� �+ c] a N 'O N E
O E m no— t0 r) YaCUwa U) y E rn nao
2 co
O CL CO ,-
- as • m M c n N = U) U CU o o Y c
H 3 n E c w 3 C 2 (7 o.0 2 a E z co a ' L a)
Q Q .L-. N .�w'y N CO a N C N 7 c6 Q N N 0 N L CL 2 2 r,
Q m m n o c E U W o L Q L CO o
o n E n a) c
U • o o n m v m o y T
0 o m m a c m to'-▪ c o a) v) CO n- Q m
> foo CD m Ty � °) � o o n O � anE
n y __ c c o• m a) c u c U )) o E >`cO fn
Z a cf6pco
L ayi Za2om Eos c n n oaEa)
n o ooao m cc a � wU• oy .tea oc .-
2aa)
T a O N (n a) m L .o `) m
E c a) n� U Cl) oa ar? a a o fna
Q O T a N CO O N — 2 O U a) y al m al a) c
U co
E N "' E U f0 f fn N n C o N a) > a 3 m a .. 0
C l0 E n E) O a f0 a N Q V C y N t0 a) O N O
L n Of CO L L.. N Z E a) n f0 N O c y o)
co E
T C ~ N w N > U N N O)c0 to N 2. co O'O)a) O
CO
2 0 . @ y fon O C N j L L as m U •N C Q y N o D CO N
3 U) N y E C) T O (n a) ..-. 3 C 0) CO U.0 T M C L c y
CO o E a) c o f E co U w m = o � n CO E
0 0) m `m U o .o o o o a) ao o 2 Q n o o a a o
N O C m j n0 ca @ N N N U 'O N 0▪ c y f6 O'a) CO N E o "i—n-
=
p'n N co
L N co C .N C O CU a)CO a) oo N o CU'O y.0 U t w •5 = .O Co N C E N
1- :- w E_ U to a E V)5 U 2 C =o Q co H o (1)CO CO N- O N F 0.E N
0
0
a)
CC
a)
U
7
0
N
a) rn
Q'
0
E T
L
0 N
V) to0)
= N -O .p O
U5 o t
a a
0 o O o
8
D 2 J6 Q
Ca
C
O
Z m
II'W^ 0
y m
W
—IN 0 0 a) 0 a) 0 a)
/� N 0
a. 0 N co N- 00 N t'N) n 0
Lo
Q U O 0 N '� O- m N '� O m 0 '� m
Q N t0 Of tO m a) Cl) U] C) > C >
2 to I, u a a n a u u n m 3
V V V C as
✓ V V 0 V V V O U L
L -o C D a c 'O -O V C -o m
_.. C c 0 C C C 0 0 coca N 0 0 m m C 0O C =
o -o a
Q O .? COoV )) N- a) co) 0 0 0 n N VO 0 tV N H11)2
Vco n
o of mt O a0 C CO:ril al c00 0 m - 0 N (0 0 CO N N y N
N 1 1 1 N t0 m ~O J �� N v) O p 0,. N l0 O N N — N
Q as c V A A A Z c V A A A 2 my A A A 2 E v) ore
c c
A
w p {1 111 ❑ ❑ : l w. 1 1 : • • ® Ea • ® LL 0i
Q y N V) fn as c
m a
• •
Custom Soil Resource Report
Table—Saturated Hydraulic Conductivity (Ksat) (1291 Chimacum
Rd.)
Saturated Hydraulic Conductivity(Ksat)—Summary by Map Unit—Jefferson County Area,Washington(WA631)
Map unit symbol Map unit name Rating(micrometers Acres in AOI Percent of AOI
per second)
Bk Belfast silt loam,wet 5.0132 3.2 16.5%
variant
CeB Casey silt loam,0 to 8 2.6040 0.5 2.4%
percent slopes
SaB San Juan gravelly sandy 92.0000 15.5 79.3%
loam,0 to 8 percent
slopes
SuB Swantown gravelly loam, 8.8171 0.3 1.7%
0 to 8 percent slopes
Totals for Area of Interest 19.6 100.0%
Rating Options—Saturated Hydraulic Conductivity (Ksat) (1291
Chimacum Rd.)
Units of Measure:micrometers per second
Aggregation Method: Dominant Component
Component Percent Cutoff:None Specified
Tie-break Rule:Fastest
Interpret Nulls as Zero: No
Layer Options (Horizon Aggregation Method):Depth Range (Weighted Average)
Top Depth:0
Bottom Depth:60
Units of Measure: Inches
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly
measured, but are inferred from observations of dynamic conditions and from soil
properties. Example soil qualities include natural drainage, and frost action. Soil
features are attributes that are not directly part of the soil. Example soil features
include slope and depth to restrictive layer. These features can greatly impact the
use and management of the soil.
20
•
S
Custom Soil Resource Report
Hydrologic Soil Group (1291 Chimacum Rd.)
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential)when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
21
i I , ,
z
Z
iii
a
O O9 Es Qd6LLES ObfiLIES 006LLES 099LLES OZBLLES OSLLLES OVULESM,.ES Sb oZZS 0 MEG, SE oZZT
::r; A.
N
y'.
Cr ,, , yy
c.t.'•v-•. rft7:
o q y
n
N ,�, .-s �f!,71
•'"pie'
r—
/iiaV l %' / s y p `. f •
CN
CV
o CL
o N
• : ;
L
0v/ // y,,. z.."y
/!i :. 1pnv.Y a,,,,,vwC ry/.1%,)'17,c''''''5.'''.i..147'''(//off / y o V
u, yi"YY-°'^,,,,„0/0.t''''''
( 1144 /_ •+ `� '/�/ / 4 rf "6 ",
' E
,,01,‘,.., f �s� s e,,‘,-;,.0„,,",r 'z
o -i
/
AM
fes `" ' � Z
, I 0
M,.ST,9b oZZT Y3 - ,n M,SI 9b UZZT
OZOBLES OB6LLES MLLES
09BLL£S OZ9LL£S 082/LES MLLES
z z
a
. • •
co cOa
G a) co N
w
w 75 2 co m rn N
7 N @ U N N a7 N 7 o a
a) m m a`) r f6 a) -O a) Q C O
f4 U T O a O_ U 2 U O a m I Nco ` C
a C U N O Z N 7 E O N O C 01 E
a) co m 0 E a) a N r a N _ V N
Q O)U p E `O C 7 'a a U c a) O co E
co• ai C U co p r' a) L a) 7 L E O) en_a o
O enZ a7 @ a O O m C n N 7 N 0 a7 w0 7CD 0.0 .. C
U C C O > a) a) N X co _ C a)
°) N E a) 0 3 N co C7 a y Z � )a z
ai o O1 Co E n -a
Q 3 LE _c L N C Cl) w m Q N a a) L N
O � 'n3N E U w mca) oa) O . c0 L 3 ` m
Q f0 a7 n C d n L N U) n C U)
'y 70 U f0 L N L N C N D .T. n N O O Q T
O O a) al E N L a1 U ja O L C O .LO-. 3 j V) co 0 m"O V• CO
T > L O O a) N 7 U T N C U O O IA N p E T m
_ c > c o _ c U n
Z N D C 'm O co O m 2 2 a 2 a) p O .0 c C co p. N° a)
O p a)a al Q. a 7 en U 'O in 4- a 0 C N N L a)
CL E C 0 y u) a) O O V a a) 'N a a ,_ N a
O aa) aa) o-0 TP. - Z .a m N m a) n« c
Q U N L co Y E V co 7 J ) N n c O N — N > .0 3 co L a 70
c E a o m@ a Q c 0) o N o n
2 76
w m E rn F w a) Z E a) n m m.o a) W p a) ' co -O 'c
co co _c T V V N N a) m m a) s a7 p) E 0 0)T 7
a) - O a C'0 C N aCL) > T a) •"..,,, CO CO U y C a) co N N O a as
2 5 C «a N N O a) 2 7 � L-. C 6 N to co C N L C tl) E
7 V1 a) N E O) T E V1 .O-. E C 7 U 7 ` >, 7 0 N n a7
w o m E `m c°)i'E o 'o c o o a) aa) m o o 2 Q p_o L 0 a o
O O C o a ns N a) 7 O U N > 7 T Ca 0 to -c O)
N O E a) 7 n P2 a) CO CO 2 L "O n." C N 7 O_a) V) a) E O 0.n aC
O N a) Ca a) C a) m a) 7 a) O a) O y D U co w — 2 _ `O N C E m
L > C E c p U 0 0 _ U L ,0 ) 7 O O L 0 E L
1- 4 > W E_ U N a E w > 0 .2 n a a a) F- O U) (n V) e- O N f-- U .- N
0
0
Ct
a)
P_
0
N M
a)Cf N
d
O
m
a C Nc
L
a U n
0
m
cU) 0 rn o
U a
al
al a) °' o a) L
gi E ca ~o cc a
y N c2 a
O mTil
0 75 a) N C .O N c .F V
O U 0 2 U) O x 7 3 v )
0 a t 3
u.
W 0 ® ® ® a m Y '
3 F m
W
J
-1.' m
a
CL
C ° m cTs
a)
C U) 0 0
y C C
c s s
O °) $ N a) .4
Q O T N QI ,a C
C
co m a ❑ ❑ o J O 0 o a 0 0
Q O) a Q 0 m 0 0 0 z O) a a 0 CO 0 0 0 2 O) < Q m m
c) C C C
C �11 �J1I
O• N p 11 0 J E1 11 11 0 '0 l i 1 1 i "( 1 0. 0 E IM ill
•Q (13 U) U)
4 U)
• •
Custom Soil Resource Report
Table—Hydrologic Soil Group (1291 Chimacum Rd.)
Hydrologic Soil Group—Summary by Map Unit—Jefferson County Area,Washington(WA631)
Map unit symbol Map unit name Rating Acres in AO1 Percent of AOI
Bk Belfast silt loam,wet C/D 3.2 16.5%
variant
CeB Casey silt loam,0 to 8 D 0.5 2.4%
percent slopes
SaB San Juan gravelly sandy A 15.5 79.3%
loam,0 to 8 percent
slopes
SuB Swantown gravelly loam, D 0.3 1.7%
0 to 8 percent slopes
Totals for Area of Interest 19.6 100.0%
Rating Options—Hydrologic Soil Group (1291 Chimacum Rd.)
Aggregation Method: Dominant Condition
Component Percent Cutoff.None Specified
Tie-break Rule: Higher
Water Features
Water Features include ponding frequency, flooding frequency, and depth to water
table.
Depth to Water Table (1291 Chimacum Rd.)
"Water table" refers to a saturated zone in the soil. It occurs during specified
months. Estimates of the upper limit are based mainly on observations of the water
table at selected sites and on evidence of a saturated zone, namely grayish colors
(redoximorphic features) in the soil. A saturated zone that lasts for less than a
month is not considered a water table.
This attribute is actually recorded as three separate values in the database. A low
value and a high value indicate the range of this attribute for the soil component. A
"representative"value indicates the expected value of this attribute for the
component. For this soil property, only the representative value is used.
24
• •
z z
omeLES 0E6LLES 046LLES 006LLES 098LLES OZ9LLES 08LLLES 072.LLES
M£S Sb oZZT M M„ES Sb oZZT
r1
✓ `max } fix. •F S/ �f,G^r*''s r
...;yFs I 'S N
`
G O
✓
el'
-0 •
ccE
O
a_-c
a) U
k Ln
CNI
= Ea
LK. � / ..
ci
U CI ,< di, cum Rd
'''g,.
fy,: v
i in
ai
c '. n
(J N
n
va L S .,
lit
•
x
z
Q
M,ST.9b oZZT __il � ,fir N� • T.,.^,. ..I .tet l'..< A{ .. M
OZOBLES 086L1.ES 066LLES O06LLES 093LLES OZSLLES 08L1.LES 072.2.LES
z z
a
• • 1
u) cci"O
O
O CO N
QaN fCO O)
`
yy 4- co 3
UI
a7 y@ y Q Hil
) N a) i
U O!« y E o o NN U E Ey _c O U)a3 n a at a) O a0 n y 7 V Op
•
O N U CO C E C L M c 0 a) O Q' 3 co y_C
`a) y E at y 3 , m U O y 2 D Z y L E y a
Q 3 y 0)N p n y U) 'o y-0 CO O O 3 U y j
Yo c_c L O c d N a y ? ca Q `) N p L )
_ y O et) c E
°1p3 E U w @ � od Q � m L yma)
73 n c L 0 n
N LS 70 Q O U a7 L a) L y D C n y co w o_
a) N o O Q D
>44
O To
u) E y D COCD U @ co — L c 0 a) j u) CO 0) n o y a7
T � L C > C 7 U T a) O U ... p O 10 O.
y O E�'O E
LL cu % o c 0 O y
Z �) a c 'm0L cu o cn aa) 2 2a � a) ca oa c � v n w ° E0
CL o T'OO y fa rX D co ay) 0U) E y w a y 0 N at o N
• E T a O N 0 U @ Q) — Z O n a N CD
y N N N D d al C
< U O y «L• E U y 7 J N o 'c O N — N > a CO L a r o
C O E O_"O N f6 D O D a V C O y O O N O
C L.. O- O p)L L.-. a) Z E a) n O O,O O �a `7 O +•-O c
y co E C F y Y T.O.. L N N O 0)O O O co E O T 7
y - O C '3 C y o > T a) L O O U N C a) Q y a 0 CL
0
_ _ coOTs
• O C co a) y O y QS L-7 V1 «• 3 c 0 a1 U O Q O E L C y E
7 U) a) �, E rn 2-'"
E _ V1 a) E 0 7 U 7 y 7 0 a) n O _
N •O O) a) cQJ'C N CD O 'Q C O N y a) C m Z < n 0 O L a 0
y 0 OI c O.m ai y N U 'O y U c E, 02 O-a) V) a) E O .y.. O'a a) c)
oo 7 d E '
L CO c y C O U aaaOyDV Eo O O s
H w _ O y a E UO 2 n=o Q co H (/) (./) U) c- 0 Ni
H U._E w
r
0
0-
a)
cC
a)
U
7
0
to
N co
Q. N
a)
O
m
c
N• C
0 o m 3
=
n
U t m
c ca O
MC
U -OO O O O
N E N cO R' w d
N N 5 2 O To N
O y N c TatO U) 81' O 0)
Z 7 U) o 2 - D 2 J •a a
❑ A r a
m o 0
®
Z 1z a
wl it Y
C
atGI 11111
,V^ F m
W
J C) a)
s
CL
N O O
y c c
o tn O O
LE* c o 0 a o o 0 0
0 o) o Cn 0 0) 0 0 � 0 y « 0 CC 0
Q '5,0 7+ 0 0 N N N 0 0 N c 0 0 N
0 N 0 c N N e 0 0 N tn U] i 0
Y) L7 d i O O N O ' . u) O O lC N O 1 . to 0 0 N N
E < a) 0 N N sO a- A Z pt O N Ln A Z 0) 0 N n A
at c c C
ea1
at N •p _ O l t t , i 0 0
•o a w
• •
Custom Soil Resource Report
Table—Depth to Water Table (1291 Chimacum Rd.)
Depth to Water Table—Summary by Map Unit—Jefferson County Area,Washington(WA631)
Map unit symbol Map unit name Rating(centimeters) Acres in AOI Percent of AOI
Bk Belfast silt loam,wet 23 3.2 16.5%
variant
CeB Casey silt loam,0 to 8 46 0.5 2.4%
percent slopes
SaB San Juan gravelly sandy >200 15.5 79.3%
loam,0 to 8 percent
slopes
SuB Swantown gravelly loam, 23 0.3 1.7%
0 to 8 percent slopes
Totals for Area of Interest 19.6 100.0%
27
• •
Custom Soil Resource Report
Rating Options—Depth to Water Table (1291 Chimacum Rd.)
Units of Measure:centimeters
Aggregation Method: Dominant Component
Component Percent Cutoff.None Specified
Tie-break Rule: Lower
Interpret Nulls as Zero: No
Beginning Month:January
Ending Month: December
28
• •
Custom Soil Resource Report
Soil Reports
The Soil Reports section includes various formatted tabular and narrative reports
(tables) containing data for each selected soil map unit and each component of
each unit. No aggregation of data has occurred as is done in reports in the Soil
Properties and Qualities and Suitabilities and Limitations sections.
The reports contain soil interpretive information as well as basic soil properties and
qualities. A description of each report(table) is included.
Soil Physical Properties
This folder contains a collection of tabular reports that present soil physical
properties. The reports (tables) include all selected map units and components for
each map unit. Soil physical properties are measured or inferred from direct
observations in the field or laboratory. Examples of soil physical properties include
percent clay, organic matter, saturated hydraulic conductivity, available water
capacity, and bulk density.
Engineering Properties (1291 Chimacum Rd.)
This table gives the engineering classifications and the range of engineering
properties for the layers of each soil in the survey area.
Hydrologic soil group is a group of soils having similar runoff potential under similar
storm and cover conditions. The criteria for determining Hydrologic soil group is
found in the National Engineering Handbook, Chapter 7 issued May 2007(http://
directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=17757.wba).
Listing HSGs by soil map unit component and not by soil series is a new concept for
the engineers. Past engineering references contained lists of HSGs by soil series.
Soil series are continually being defined and redefined, and the list of soil series
names changes so frequently as to make the task of maintaining a single national
list virtually impossible. Therefore, the criteria is now used to calculate the HSG
using the component soil properties and no such national series lists will be
maintained. All such references are obsolete and their use should be discontinued.
Soil properties that influence runoff potential are those that influence the minimum
rate of infiltration for a bare soil after prolonged wetting and when not frozen. These
properties are depth to a seasonal high water table, saturated hydraulic conductivity
after prolonged wetting, and depth to a layer with a very slow water transmission
rate. Changes in soil properties caused by land management or climate changes
also cause the hydrologic soil group to change. The influence of ground cover is
treated independently. There are four hydrologic soil groups, A, B, C, and D, and
three dual groups, A/D, B/D, and C/D. In the dual groups, the first letter is for
drained areas and the second letter is for undrained areas.
The four hydrologic soil groups are described in the following paragraphs:
Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly
wet. These consist mainly of deep,well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
29
• •
Custom Soil Resource Report
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential)when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
Depth to the upper and lower boundaries of each layer is indicated.
Texture is given in the standard terms used by the U.S. Department of Agriculture.
These terms are defined according to percentages of sand, silt, and clay in the
fraction of the soil that is less than 2 millimeters in diameter. "Loam,"for example, is
soil that is 7 to 27 percent clay, 28 to 50 percent silt, and less than 52 percent sand.
If the content of particles coarser than sand is 15 percent or more, an appropriate
modifier is added, for example, "gravelly."
Classification of the soils is determined according to the Unified soil classification
system (ASTM, 2005) and the system adopted by the American Association of
State Highway and Transportation Officials (AASHTO, 2004).
The Unified system classifies soils according to properties that affect their use as
construction material. Soils are classified according to particle-size distribution of
the fraction less than 3 inches in diameter and according to plasticity index, liquid
limit, and organic matter content. Sandy and gravelly soils are identified as GW, GP,
GM, GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH, CH, and
OH; and highly organic soils as PT. Soils exhibiting engineering properties of two
groups can have a dual classification, for example, CL-ML.
The AASHTO system classifies soils according to those properties that affect
roadway construction and maintenance. In this system, the fraction of a mineral soil
that is less than 3 inches in diameter is classified in one of seven groups from A-1
through A-7 on the basis of particle-size distribution, liquid limit, and plasticity index.
Soils in group A-1 are coarse grained and low in content of fines(silt and clay). At
the other extreme, soils in group A-7 are fine grained. Highly organic soils are
classified in group A-8 on the basis of visual inspection.
If laboratory data are available, the A-1, A-2, and A-7 groups are further classified
as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional
refinement, the suitability of a soil as subgrade material can be indicated by a group
index number. Group index numbers range from 0 for the best subgrade material to
20 or higher for the poorest.
Percentage of rock fragments larger than 10 inches in diameter and 3 to 10 inches
in diameter are indicated as a percentage of the total soil on a dry-weight basis. The
percentages are estimates determined mainly by converting volume percentage in
the field to weight percentage. Three values are provided to identify the expected
Low(L), Representative Value(R), and High (H).
Percentage (of soil particles)passing designated sieves is the percentage of the soil
fraction less than 3 inches in diameter based on an ovendry weight. The sieves,
30
• •
Custom Soil Resource Report
numbers 4, 10, 40, and 200 (USA Standard Series), have openings of 4.76, 2.00,
0.420, and 0.074 millimeters, respectively. Estimates are based on laboratory tests
of soils sampled in the survey area and in nearby areas and on estimates made in
the field. Three values are provided to identify the expected Low(L), Representative
Value (R), and High (H).
Liquid limit and plasticity index(Atterberg limits) indicate the plasticity
characteristics of a soil. The estimates are based on test data from the survey area
or from nearby areas and on field examination. Three values are provided to identify
the expected Low(L), Representative Value (R), and High (H).
References:
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
31
.
y C co c7 c) M co co
N N
RI' J Cl'_ a d 0 U O O
CL >• Z Z Z
a.„, 2
a E li C? .T C? r�i coi r`oi �� coo
J J O 0 O a) O O
co co c) N a
N u,
i2
a) Gin O In uS IA O
O .0.., E NN.0 c ° nocc, u2,
J La in
r- co M co n co
O C L
E J d a (: �o coo un m � c000 � O a) 0
> U > 'y J0 0) co U) N i O O O Q O
0) C co r v- r co co
CO p CU J w o
N -0 N 2 O c)
C 0 -0 GO
co cn c ff
a) 7 N 6
0 O cO cOo) O
u) 7 > U m J OO LC) in Lr) L
8
co co co co co
Q > Q 2 o O
N7 a) 02 00 00
•U u a O o 0 ob oo oo
C C3 mo o,0 00 00
• VO) 0.)
d J 0 o`' 0)0' O off')O o01) O 001) O
0 C
U c L S o d o O O o 0 0
C 2 2 a) :E at t%• _ 0 0 0 0 0 0
-aa.) mTs .- co 0 0 0 0 0 0
p V -13 Ri LL o r = 0 0 0 0 0 0
Cr
N •C m 'O Q d n = 0 0 0 0 0 0
Q' a) O �p > Z. 0 0 0 0 0 0
fA O p `O L
U N 6 N Q 7 O
a) >, > a) C H a
0 L L (O f6 = 0 N c
~ gyp w «� Q v 1- c"i co r- n
7 CV
a "a a) 0 Q Q Q a a Q Q M
15 C O N m co
(nE C > l0 m 2 J J
.) E N m U c (J) U U
p (1) J J J
V) O a)
Q~ a U I U
7 c -o N 2
U a) C N a •p o T a)
o V 3 rn , >. E - w
U L e N f0 N T
.L7 0 L � � m K > - E E >
l0 CD ,_ _0 L Q _ O Ca m'C f0 O CO O
10 U = O E E E N ul2 E as V a) "O
CD
L ni II = W j o 0 CO 4= >,c co o o m m
yf-- = c _c _ wU = L_-U 12_ N
)
)
r+ fA
•
cn al L 0
O .0
44
N 13 N X C m - O O N. M O
p C 0 a3 0 a? N 0 r- c%)
U -c '� - 0 O) N0 c)
a > C CO tt
C > W ° 0.
Oc a) u C
`a m m v a) a
= rn .o o j xT °' 0 0
NN N 0 a) ,n 0
N C 7 Z ° > O p,« Cr) o
, N C
0.
c c
(-) m c 0 U)
( ac c En
cn O C a) a R E a) o 0
°- (1)
Q o 2 0 c d to
o 3 - c
£ — c y m
>.c rti- •
C N T O
o C N f6 N
w > N N
•= CO
3 a d > N co >.
2 ro 3 m C) 0 U
• •
Ce) 41) Z 9
,it�C MCi
U? O M M
Z Z Z Z Z Z
3'E a' co N N O co O .- co 0
J— J 47 c? co n N
0 O O
N N O
O o N �i o M o 1N ce) 'N N O
E J
3N a) CO u7
> _
> O L6 O
a O M O O M O ry 0 O
.OJ J 0 u] 0 V 0 0 D M D N
m N R co N
0 =
R O C7 ca
O. u? �n u?O (OO O 1" 2 fi 2 ry IA
al J in n u7 n O O O O u)at Li-) M
C =
LI m• a W 00 W o W O u7 LL7 u') O
- O O O O O O O O O n
a rn F- co u, n to
c
0
CA Y3 O m = o 0 0in Lo
o
e n-.c
2E M 0 0 0 o <4) U, 0
°'
a
m LL o 0 = O o O O O O
o G %--t
NQ a A 0 . O O O O O O
Ce Z O O O O O O
C
a)2o O
7 U c S N N
o C O Cl) Q • Q
CA 0 « aa -
a)CC a) v Q Q Q Q Q Q Q M
p 7• 0 a a
m
E r 0 c ��� cf?0 C27ai�
y a o o o
m 2 >
U a >_ > >
O o CN O a a a
C 3 > N > 06 f`T f0 >� c
.49 K a >a c y a u) CO ., N N
of r C fa M EC o > CO Ec > > E » E T
y O > O N N
C f6 N co > > O)C E C
0) O �'+ , ca y y T N > f6 > N
C
W � m ` cm -0-
m oEEa `0)E � COT
E. � 8 �° 8 zo0N roy zo
c� c� 0 >
.c
a = O N 0
0 N. CD CO N O
O M
O N
0 N
o a.
o 0 3
x o'
a o
w o O
0 0,= 0 0
as
a E 3
c E al co
to fa O
O_
.0 T y C 0 N
AE 0a c 3 E- E
D m 8 o m oa
0 C M N N C 0 N C
C w (n d CO m T C
3 I > .0 i > U
6 1 �0 C N O la
2 07 O co N CO Cl.
• • .
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/
n res/detail/national/soils/?cid=nres 142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres 142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres 142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/
4 2
home/.cid--nres1 2p _053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/
detail/national/landuse/rangepasture/?cid=stelprdb1043084
34
•
Custom Soil Resource Report
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/
n res/detail/soils/scientists/?cid=n res 142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/?
cid=nres142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nres.usda.gov/Internet/FSE_DOCUMENTS/nres142p2_052290.pdf
35
•
Stormwater Mitigation Plan and SWPPP f 2017
APPENDIX IV
PROJECT PLANS
12
, I 1 r.
-as (minis
65>l6N0 ON3B HitlON ,&M'N'0.10.0 4•
`dM 'WfOVWIHo 6 _ eWVNa .,,
�340W3b I '8 D )1 3H1 all'`JNLL1rISN0o ,,,r AB 03N0830 =\� I0 U
8`ONIN33NION3 6SV TWOSu\/f s M31"O'° w
Mdld 31IS 11VH3AO NOSIIM Or06 36 w.6 y
S
' ZED 1 -0 V in 3
gl'{{ 11
ag {
w 1 - i € Via. �Alpo §§s W Z c~0 t U
��n9 d �
7m_.n
Q € g i . fie . XE1r0 Y �.--g- i € el 1 ,g-< -:41101)
<' V
U 1.
14! ;3 gg! w 1412. 1 gi 1 124 _
f w 0Ih w'—a 0 2 - § �' egg- e_ QY - ! ` l = g .F I gg WO . W
H
o Ug N a 1 f g2 ice ' 7 _ �w_ . i
i ..6 E a g-" - i - z- zP t. . & - gipg_ g -g QC Io - "
cn mI Wad a r 5= 4 •S -. u 8g. "VW 4 �'j
/t1; ai 1"' Ili g " :-..2 Ph ig-hd."' 1 g 1014 0 gi gl v g . 210d
„ ��Egi ft n a3 4 6 :6€1 W �Ost X4 g 41 1 € 64:a .€ al - g Xi.
LL +
i +
J __ ,r,11111 11-11
T— --7-17--'( ----._ _7-,---- ----.'----------
i �IIIIIIIIIiI I 1 I
J 1 INIIII1111111 1 1 11
Q i �I1111111111 I 1
101111111111 1I 1 OL
= W / I Ij —
11111111 1 I
r`� �` ni rye'
���
'v..gp,,xd,\i toe 9i ,
/ ,` 4' SFJ 111�I /' \ '
-ri`n "k 5'3 r5 193 -
-' \', f6{.}�1_ ,,,,,11111 Z/ '- .i-
o t- :ii.:
fix` / _ /
_ • sre"
-s- //-- w
/- �` — T / �- -- tr o
Q o
- -/-- + //''' -'- —'- t g
/ i
/ 011
V
--� %
m I 6 I 6 IL I 6 I 6 + P , 6 1 6 ,
11S °Ianls n[PESIWL)a M3w3tl
�R a . . ,
WW�NItl33Nl•SINNO8,IM'M'-MMM IS,AVf OXJ3H� -
VM 'wn3b'wIHo ,�>l,tloa 3tlHtl�N N
3Wtl AtlNMOtl9 SELZ wql'AB NMVtlO r
011'9NIllf1SN03 °' U
13C1M321 1 V 93>I3H1. '8`JNR133NI`JN3 mor ci%c see.„,„ Vil
NV1d 3S31'8 dddMS NOS1IM Or "°"SV
3 7YDS 3.tl� Nolaw3tl WAs ' Hi
d,YLM]I'wIH�3111111EW/�[49L40 WIC]MNl Zp4\91J3�Otld\� w
J I
�L' II II I I I I I I I 1 II — II II
Z� o ( I I I I I I I I I
,n
.W v.)
5 II
I 1111111111111 °OH ' yu
o LI-1� LJ LJ I J.--i- io ' mo
' __J� I I L 1 ---__ �"— IiI ""__ V9 19'
, r
11 q 11111.1111111111 ,,
p I I
I' I,I i,
ili I I
(2__(±1-
2.00111 ,
` \ '
\
\
-1-
it \ ,
.-r 1
' I , -I ,, I -
., in_ ±
z 1Ir--� L I L -
L--(± —IJ ,
r2 I� I \y 'Nxi \,r
_ __[--
o i,.
�x lg.I' I 1
W ! >/ v ��
CL / '� - ys I I
0_ Ail; :':a!,('''A . --'11l 1.. \ I" \.// ! i1
41,a: :„:,.' I I
' ' ....' '.” I ,--- \
F ':::.:‘;:];:-,...:-,7,11111J
1 ,_ , ,YII I \ 1
_ I I
,
<_6 4).:`,f::- `:-. / _ N l
V J -iia . ♦ I Z "' >L €3
atm / W eig11g
I r /
I a / n n
04 9 e L 9 s 4' J [ 1 L 1 4
4 I. I 41.
11SOIOn1S .1¢ERI a 1 .IA.
WOOON�.L9,N3a0°IWJf MNM l°I x 03XJ3a0
dM 'wnOWsJIHO 3rd ON56i M
1340W32� 138 `O N 3Hl 011'`ONIllf1SNOO MN 00.06. ttg ��..o,,.,y
S`ONI833NI`ON3 ln v1�
NO1 SV
3OVNIb21a '8 ONIOV2iO NOS1IM 3C ,, 1YJ6
, ao,°IA3a w.°
...1,Z-1.1'wN0-3111RIOMP,Bi tO.4,11.1 IDt131070a°10 »
Cp`
0 i I III 1 i 2 �d u,
Z _ un =
V lel
1 t Y o, °u j I. o
1 II u'-�
I I II II I -0-" " c'
1 1-"i
T 2 il
JU1
1/3 i5 1
/' /I IR-- p f_aa i1 70.7
Z Y88. a
a igg g
W 1 /d 1 c v
PI II 1f, W a
p RI
/1'A\ ��f� 3Ea M--
- O Bo
x 1. 84 I \ ' ' \
0 g�EI , I I \_ II \-
DR r -I
11-L'__J
Z
zi L� \ it
-J
1 § Ito
,Rttt
h. \" moi . \
' N'
� o o0'M+ll 1MV ILT OSA 34. —
:sI R tI
Z sI::fr. F \ I 6" £ j
\ 8£�
^0 It/ .::::1:4t7:c!::::i.;/..:Le.::::.fr'x SS
$ p44.k1,4sP„1. tN:.-:.\,-ij:K-.,,...:,-.,r.-:1-: 7 51
Is oak Q6. 2 Is 1
qa
L.
tri
A. II: ':. >.;1011 zZ pR:01 :9
j /1 1
_ ' s` , . ,. PO
I��>:.� =::' / //
U it `i,'2 :. IT" -
(rye.. `FA ■�1
s -------------
m /
m
8 L
II �1, 1 / OO +OI-viral Vila• - 1 1 c.
i
i
of 1 8 I ° IL 1 8 1 5 1 t 1 E 1 i I t
l
11Soian±S La)etee(.0U3 1 ` ,3tl
O1.331.,43N051W,AMMA 1&MT 0 Ate"•
SOLS 21 0,.04333 H1tlON r
YM 'Wf1O`dWIHO W BSfLL AB WV. �'_- v
l3QOW321 I '8 O3>i 3Hl '2 `JN33NI NOJ MOS AO 03N01530 uaa
8`JNIa33Nl`JN3 °t/t "0'01°r
SlIVi a NOS1IM 01- ,,,,,,., 3.„,,s 31. NOISN3a WAs
°W 1-MOr WMJ-3111fl0M.M3Ll0 m43.1 1 Lo3sisarO&O
s 1 F.
I y a 51,k
-_
P i le D11°'S f,, e �A---.40..„‘.W4 9. i w .E F t 2 E g
III J f 4 r h, L.
I O aB iiIJ-1----•
4°1°'
I,LL
11 jr - LL 1I..
f ., L 9 4 `r .- ; I ,� 1P x Ei
) $
c 1 0>_ my
L , o
I 1 to ~_.!
og
Og ill O
.4_i_3. d 21111
.
----_._ i7 R iX
gY gl
s Is 1,4,0411*
M.60'� p Ii ��b R 4'u I P
- , h�, ,y41 R/if ';iii g i a '�t )',�
2 11
W �ga vi t F_ � , •,, s�
0 F`� ��: !ES E a ♦got Hi
liysq / ', ;r= �... "1. 34t >e'
fr` g
_ ,C ow•�, a otW'.='1
j' \\ ;'i tai $8 ; �. -, ,1 E i
•
y Iii , ,, is .g, ,7;q
P8 1
ill d
.'...,,..,\
.10
ET
� , \ 3 •� a: i�� /te t ke3 d
li
m4\� ig ET5 a c a
a; z � � d C vv
l €5\ \\ ; 4 Hi 30v ;4:4F E•
1.
N !-. iii:'si =O e a 01
''9 i- _ `°alit W:
l' 8a W a Q ' «9 € i€ *all PI; h?! J
ME4. xW q m`
44
p lei � a � � ng ad
.05 im.iA;ajpi% W12
€
* gE/ 2 eo ig g ,1111 0 it 5 % § 2 2 ii -g
i. ggne : o l 2 1 � El 1 2 P la g Oil " ase _J� sge TO.I
x <al� aim xf. nellOi- 441a xf.g x! ., xh .t ,m
OL I 6 I 8 I L I 8 I a I > I c I L 1 ,
*VOICE . Date: 2/15/2017
Invoice Invoice ID: 2017BLD17-00046
0
(30
�'� JEFFERSON COUNTY
'.< DEPARTMENT OF COMMUNITY DEVELOPMENT
621 Sheridan Street I Port Townsend, WA 98368
Date Due:
�9S �o� 360-3794450 I email: dcd@co.jefferson.wa.us 3/17/2017
i�IN(' www.co.jefferson.wa.us/commdevelopment
BILLING ADDRESS:
CHIMACUM SPACEPORT LLC DPW Stormwater/Bldg Coml 670.00
154 WILD PLUM RD
CHIMACUM WA 98325 Total Amount Due: $670.00
REMIT TO:
Jefferson County DCD
621 Sheridan St.
Port Townsend, WA 98368
Please return the above portion with your payment
Permit Number: BLD17-00046
DPW Stormwater/Bldg Coml 670.00
Total Amount Due: $670.00
Payment is accepted by cash, check, debit or credit card (Visa, Mastercard, Discover, American
Express)
To pay by credit card, go to www.co.jefferson.wa.us/commdevelopment, and click on the "Online
Credit Card & echeck Payments" link on the left side of the page. (questions: call 360-379-4450)
i
\ Pt/O1'
r le FY i
alo\ / / )
jk( 1 ,
‘...___.... 1
l
Jdzeiliterc
S •
2235 Broadway
*Tw JCIAT North Bend,OR 97459
Business:541.808.3300
JC Wilson Engineering&Consulting,LLC Cell:208.553.6742
Innovative-Practical-Strategic www.jcwilsonengineering.com
STORM WATER MITIGATION PLAN AND SWPPP
D VC1EiN I," 0
FEB 1 4 2017
AEFFERSON COUNTY DCD
PROJ ECT:
THE KEG & I REMODEL
/ kQ..iiic.,ea -
OWNER:
1)0\1)
Keith Rasmussen
154 Wild Plum LN
5
Chimacum, WA 98325-8728
(619)309-8488
ENGINEER:
Justin C. Wilson, PE
February 3, 2017
•
Stormwater Mitigation Plan and SWPPP 2017
TABLE OF CONTENTS
1.0 Background and Scope of Work Page 1
2.0 Stormwater Permitting Requirements Page 1
3.0 Geotechnical Evaluation Page 2
4.0 Stormwater Design Requirements Page 2
5.0 The Limitations of this Report Page 7
APPENDICES
Appendix I—Permitting Documents
Appendix II—Soils Report
Appendix III—Project Plans
• • 2235 Broadway
*1W North Bend,OR 97459
J C W Business:541.808.3300
JC Wilson Engineering &Consulting,LLC Cell:208.553.6742
www.jcwilsonengineering.com
Innovative-Practical-Strategic
February 3, 2017
Keith Rasmussen
154 Wild Plum LN
Chimacum, WA 98325-8728
(619)309-8488
Subject: STORMWATER MITIGATION PLAN, REPORT,AND SWPPP FOR THE PROPOSED
SITE IMPROVEMENTS AT 1291 CHIMACUM RD, CHIMACUM, WA 98325.
JEFFERSON COUNTY PARCEL#: 901113011
Dear Mr. Rasmussen and Others Concerned,
1.0 BACKGROUND AND SCOPE OF WORK
JC Wilson Engineering & Consulting, LLC was requested by StudioSTL to complete a stormwater
control plan to mitigate stormwater runoff related to the proposed gravel parking lot
improvements for the subject parcel. The approximately 0.78-acre property has been assigned
Jefferson County parcel number 901113011.
2.0 STORMWATER PERMITTING REQUIREMENTS
Development projects within the jurisdiction of Jefferson County are required to prepare
stormwater control plans in accordance with the Department of Ecology's (DOE) 2014
Stormwater Management Manual for Western Washington (SMMWW). The scope of
engineering design requirements is generally based on the total area of new impervious
surfaces and total land disturbing activities. The Stormwater Calculation Worksheet and Flow
Chart for New Development provided by Jefferson County were completed to determine the
applicable engineering design requirements. These documents are located in Appendix I for
reference.
This project is a "medium" project and thus must comply with "Minimum Requirements#1
through #5"of the DOE 2014 SMMWW must be met. These minimum requirements are
discussed in more detail in Section 5 of this report.
• •
Stormwater Mitigation Plan and SWPPP 2017
3.0 GEOTECHNICAL CONDITIONS
USDA Natural Resources Conservation Service (NRCS) soil information was utilized to obtain
general site soil conditions to determine what chosen BMP would work most effectively and
efficiently for this site. I do not typically propose retention facilities in areas that will not
infiltrate at least 2 in/hr, but soils on this site have much better than adequate infiltration
properties.
The soil map unit for this location is listed as SaB-San Juan gravelly sandy loam, 0 to 8 percent
slopes. This soil type is Hydrologic Soil Group A, and has a Ksat infiltration in the range of 5.95
to 19.98 in/hr. This is consistent with other projects that I have completed in this area. The
NRCS oil Report can be found in Appendix II of this document.
4.0 STORMWATER DESIGN REQUIREMENTS
The five basic minimum requirements of the DOE 2014 SMMWW have been followed to
complete a stormwater control plan for the proposed project. Compliance with the minimum
requirements is summarized below:
Minimum Requirement#1 — Preparation of Stormwater Site Plan
A Stormwater Site Plan has been designed to mitigate increases in stormwater runoff
generated from new impervious surfaces created by the project. The Stormwater Site Plan is
included in Appendix Ill of this report.
Minimum Requirement#2—Construction Stormwater Pollution Prevention
To prevent erosion and discharge of sediment and other pollutants into receiving waters a
Construction Stormwater Pollution Prevention Plan (SWPPP) for the project has been
developed and is included with the Stormwater Site Plan in Appendix Ill. The 13 Elements of
construction stormwater pollution prevention were considered in developing the SWPPP.
Construction recommendations for meeting the goals of the 13 Elements of construction
stormwater pollution prevention are provided in this section.
Element#1: Preserve Vegetation/ Mark Clearing Limits
Before beginning land disturbing activities, including clearing and grading, the
contractor shall clearly mark all clearing limits. The clearing limits shall be kept to the
minimal area necessary to construct the proposed facilities.
The native top soil and natural vegetation must be retained in an undisturbed state to
the maximum degree practicable.
2
• •
Stormwater Mitigation Plan and SWPPP 2017
Element#2: Establish Construction Access
There are two graveled entrances to the site, one being near the northwest corner of
the parcel off of Chimacum Road and the other in the southwest corner off of the
property off of the same road. Construction access to the site should be limited to one
of these routes if possible.
The access point to the site should be stabilized with a pad of quarry spalls or crushed
rock construction entrance to minimize tracking of sediment onto paved areas and
public roads.
Any sediment tracked off site onto roadways shall be cleaned thoroughly at the end of
each day or more frequently as necessary. Remove sediment from roads by shoveling,
sweeping, or pick up and transport the sediment to a controlled sediment disposal area.
Afterwards, conduct street washing if necessary.
Element#3: Control Flow Rates
Properties and waterways downstream of the project must be protected from erosion
resulting from increases in velocity of stormwater runoff from the project site. BMPs
shown on the included engineered plans shall be implemented to reduce or eliminate
increased stormwater runoff from this site.
Element#4: Install Sediment Controls
The contractor is responsible for installing and maintaining effective erosion control and
sediment control BMP's to minimize the discharge of pollutants. These BMP's shall be
functional before land disturbing activities take place. Straw wattles, silt fencing, or
brush barrier should be installed per instructions provided in the Temporary Erosion &
Sediment Control Plan.
Element#5: Stabilize Soils
Exposed and unworked soils shall be stabilized by application of effective BMP's that
prevent erosion.
Soils must not remain exposed and unworked for more than the time periods set forth
below to prevent erosion:
• During the dry season (May 1—Sept. 30): 7 days
• During the wet season (October 1—April 30): 2 days
3
• •
Stormwater Mitigation Plan and SWPPP 2017
Stabilize soils at the end of the shift before a holiday or weekend if needed based on the
weather forecast.
Stabilize soil stockpiles from erosion, protected with sediment trapping measures, and
where possible, be located away from storm drain inlets, and drainage channels.
The amount of exposed soil should be minimized as much as possible during
construction activity.
Element#6: Protect Slopes
Steep slopes requiring temporary protection during construction are not anticipated to
be encountered.
Element#7: Protect Drain Inlets
Catch basin filters or an equivalent BMP should be installed in any affected inlets to
prevent sediment from entering conveyance systems.
Element#8: Stabilize Channels and Outlets
On-site conveyance channels must be constructed and stabilized to prevent erosion.
This element should not be large factor on this improvement project.
Element#9: Control Pollutants
The contractor shall install, implement, and maintain effective pollution prevention
measures to minimize the discharge of pollutants.
The contractor shall handle and dispose of all pollutants, including waste materials and
demolition debris that occur on-site in a manner that does not cause contamination of
stormwater.
Cover, containment, and protection from vandalism for all chemicals, liquid products,
petroleum products, and other materials that have the potential to pose a threat to
human health or the environment shall be completed by the contractor. On-site fueling
tanks must include secondary containment with 110% of the volume contained in the
largest tank within the containment structure. Double-walled tanks do not require
additional secondary containment.
4
• •
Stormwater Mitigation Plan and SWPPP 2017
Conduct maintenance, fueling, and repair of heavy equipment and vehicles using spill
prevention and control measures. Clean contaminated surfaced immediately following
any spill incident.
Apply fertilizers and pesticides in a manner and at application rates that will not result in
loss of chemical to stormwater runoff. Follow manufacturer's label requirements for
application rates and procedures.
Adjust the pH of stormwater if necessary to prevent violations of water quality
standards.
Assure that washout of concrete trucks is performed off-site or in designated concrete
washout areas only. Do not wash out concrete trucks onto the ground, or into storm
drains, open ditches, streets, or streams. Do not dump excess concrete on-site, except
in designated concrete washout areas. Concrete spillage or concrete discharge to
surfaces waters of the state is prohibited.
Element#10: Control De-watering
Any required de-watering shall be maintained onsite with applicable BMP.
Element#11: Maintain BMPs
Maintain and repair all temporary and permanent erosion and sediment control BMPs
as needed to assure continued performance of their intended function in accordance
with BMP specifications.
Remove all temporary erosion and sediment control BMPs within 30 days after
achieving final site stabilization or after the temporary BMPs are no longer needed.
Element#12: Manage the Project
Inspect, maintain, and repair all BMPs as needed to assure continued performance of
their intended function.
Maintain and update the construction SWPPP.
Element#13: Protect Low Impact Development BMPs
All infiltration BMPs must be protected from sedimentation through installation and
maintenance of erosion and sediment control BMPs on portions of the site that drain
5
• •
Stormwater Mitigation Plan and SWPPP 2017
into the Infiltration Trench BMP. If sediment accumulation occurs, restore the BMP to
its fully functioning condition.
Prevent compacting this BMP by excluding construction equipment and foot traffic.
Protect completed lawn and landscaped areas from compaction due to construction
equipment.
Keep all heavy equipment off existing soils of LID facilities that have been excavated to
final grade to retain the infiltration rate of the soils.
Minimum Requirement#3—Source Control of Pollution
All known, available, and reasonable source control BMPs are to be applied to the project.
Source Control BMPs include Operational BMPs and Structural Source Control BMPs. A list of
BMPs to be considered by the project Owner is provided below.
• S407 BMPs for Dust Control at Disturbed Land Areas, Unpaved Roadways, and Parking
Lots
• S411 BMPs for Landscaping and Lawn/Vegetation Management
• S414 BMPs for Maintenance and Repair of Vehicles and Equipment
• S416 BMPs for Maintenance of Roadside Ditches
• S417 BMPs for Maintenance of Stormwater Drainage and Treatment Systems
• S420 BMPs for Painting/Finishing/Coating of Vehicles/Boats/Buildings/Equipment
• S426 BMPs for Spills of Oil and Hazardous Substances
• S431 BMPs for Washing and Steam Cleaning Vehicles/Equipment/Building Structures
Minimum Requirement#4—Preservation of Natural Drainage Systems and Outfalls
Natural drainage systems and outfalls will not be affected by the improvement proposed in this
parking improvement plan. Drainage patterns will not be changed from existing conditions.
The suggested infiltration trench will retain additional peak flows produced by the added gravel
surfacing, helping to recharge onsite ground water conditions.
Minimum Requirement#5—On-Site Stormwater Management
An infiltration trench is proposed for permanent stormwater management of runoff resulting
from the creation of new impervious surfaces by the project. The infiltration trench will rely
upon a combination of infiltration, and temporary retention to mitigate stormwater runoff.
6
Stormwater Mitigation Plan and SWPPP 2017
5.0 THE LIMITATIONS OF THIS REPORT
This report has been prepared for the exclusive use of Keith Rasmussen for the proposed site
improvements mentioned herein. The recommendations in the report apply only to the
property that was evaluated and they are not transferrable to other locations. The
recommendations contained in this report are based upon site conditions as they existed at the
time of our studies. During construction, if subsurface or other conditions are discovered that
are significantly different from those described in this report, JCW should be advised at once so
that we may review the conditions and reconsider our recommendations, where necessary.
We recommend that a contingency be established in the project budget and schedule to cover
unexpected conditions.
Within the limitations of scope, schedule, and budget, our services have been executed in
accordance with generally accepted professional engineering principles and practice. This
warranty is in lieu of all others either expressed or implied.
Sincerely Yours,
JC Wilson Engineering
11041)
4cQt4
c*,aiirer •IP-
(vo
1 %.: •
45910
• 416..GfSTE9!),S,
‘1/4 ION
c
r .
J in Wilson, PE
P. ncipal Engineer
7
• •
Stormwater Mitigation Plan and SWPPP 2017
APPENDIX I
PERMITTING DOCUMETS
8
•
ON ooh DEPARTMENT OF COMMUNITY DEVELOPMENT
Cz, yt, 621 Sheridan Street,Port Townsend,WA.98368
ti Tel:360 379.4450 ( Fax.360..x,9.4151
\\el):www.co.jefferson.wa.us/communis development
dcd(a co.jeiferson.'.va.us
�S�I
NO GAO
STORMWATER CALCULATION WORKSHEET
MLA# PROJECT/APPLICANT NAME:
DETERMINING STORMWATER MANAGEMENT REQUIREMENTS:This stormwater calculation worksheet should be completed first to
classify the proposal as "small," "medium," or "large." The size determines whether a Stormwater Site Plan is required in
conjunction with a stand-alone stormwater management permit application, building permit application, or other land use approval
application that involves stormwater review. The basic information will also be helpful for completing a Stormwater Site Plan, if
required.
PARCEL SIZE (I.E., SITE)
Size of parcel 0.78 acres An acre contains 43,560 square feet. Multiply the acreage by this figure.
Size of parcel in square feet 33,881.82 sq/ft
Land-disturbing activity is any activity that results in movement of earth, or a change in the existing soil cover(both vegetative and
non-vegetative)and/or the existing soil topography. Land disturbing activities include, but are not limited to clearing,grading,filling,
excavation,and compaction associated with stabilization of structures and road construction.
Native vegetation is vegetation comprised on plant species, other than noxious weeds, that are indigenous to the coastal region of
the Pacific Northwest and which reasonably could have been expected to naturally occur on the site. Examples include species such
as Douglas fir, western hemlock, western red cedar, alder, big-leaf maple, and vine maple; shrubs such as willow, elderberry,
salmonberry,and salal; herbaceous plants such as sword fern,foam flower,and fireweed.
LAND DISTURBING ACTIVITY, CONVERSION OF NATIVE VEGETATION,AND VOLUME OF CUT/FILL
Calculate the total area to be cleared, graded,filled, Answer the following two questions related to
excavated, and/or compacted for proposed development conversion of native vegetation:
project. Include in this calculation the area to be cleared for:
Does the project convert 3 acres or more of
Construction site for structures 300 sq/ft native vegetation to lawn or landscaped areas?
Drainfield, septic tank, etc. 1,500 sq/ft Circle: Yes No
Well, utilities,etc. 200 sq/ft Does the project convert 2'/2 acres or more of
2 630 native vegetation to pasture?
Driveway, parking, roads, etc. sq/ft
Circle: Yes No
Lawn, landscaping, etc. sq/ft
Other compacted surface, etc. sq/ft Indicate Total Volumes of Proposed:
Total Land Disturbance 4,630 sq/ft Cut Fill (cu/yd)
Impervious surface is a hard surface that either prevents or retards the entry of water into the soil mantle as under natural
conditions prior to development. A hard surface area which causes water to run off the surface in greater quantities or at a n
increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces include,
but are not limited to roof tops,walkways, patios, driveways, parking lots or storage areas, concrete or asphalt paving,gravel roads,
packed earthen materials,and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater.
stormwater calc worksheet—REV.10/20/2014 1
•
STORMWATER CALULATIONS–IMPERVIOUS SURFACE
NEW EXISTING
2 373
Structures(all roof area) 166 sq/ft Structures(all roof area) sq/ft
Sidewalks 150 sq/ft Sidewalks 222 sq/ft
Patios sq/ft Patios sq/ft
Solid Decks sq/ft Solid Decks sq/ft
(without infiltration below) (without infiltration below)
2 877
5,513
Driveway, parking, roads, etc sq/ft Driveway, parking, roads, etc sq/ft
Other sq/ft Other sq/ft
Total New 3,193 sq/ft Total Existing 8,108 sq/ft
TOTAL NEW+TOTAL EXISTING" 11 ,301 sq/ft *This amount will be used to check total lot coverage.
The following questions will help determine whether the proposed project is considered development or redevelopment.
DEVELOPMENT v. REDEVELOPMENT
35
Divide the total existing impervious surface above by the size of the parcel and convert to a percentage: 33. %
Does the site have 35%or more of existing impervious surface? Circle: Yes No I/
FURTHER INSTRUCTIONS: If the answer is yes, the proposal is considered redevelopment and the attached Figure 2 should be used
to determine the applicable Minimum Requirements. If the answer is no, the proposal is considered new development and the
attached Figure 1 should be used. At this juncture, the applicant should refer to the applicable Flow Chart to determine the
Minimum Requirements for stormwater management. DCD staff will help verify the classification of the project and the application
requirements.
For proponents of "small" projects who must comply only with Minimum Requirement #2—Construction Stormwater Pollution
Prevention—an additional submittal is not required. The proponent is responsible for employing the 12 Elements to control erosion
and prevent sediment and other pollutants from leaving the site during the construction phase of the project. Pick up the
Construction Stormwater Pollution Prevention (SWPP) Best Management Practices (BMPs) Packet. Proponents of "medium"
projects—those that must meet only Minimum Requirements#1 through#5—and for "large" projects—those that must meet all 10
Minimum Requirements—are required to submit a Stormwater Site Plan. DCD has prepared a submittal template of a Stormwater
Site Plan, principally for rural residential projects. Complete the template in the Stormwater Site Plan Instructions and Submittal
Template or prepare a Stormwater Site Plan using the step-by-step guidance in the Stormwater Management Manual.
APPLICANT SIGNATURE
By signing the Stormwater Calculation Worksheet,I as the applicant/owner attest that the information provided herein is true and correct to the
best of my knowledge. I also certify that this application is being made with the full knowledge and consent of all owners of the affected
property.
(LANDOWNER OR AUTHORIZED REPRESENTATIVE SIGNATURE) (DATE)
70:�y yry. �r �iy y .k 1 01:!--„ -
'4=
A��€f�G -SJ��I �,y.�,-� }-.. i' � 4T 2 J" -�p� •� � � r �� -�' ��'� , � ��1 I "�'�Y =f �fi �� '1 �P
�� - �'` - � til b-; - ll , i v � -
S tMEAlt1M r; LARGEri . DEVELOPMENT a-StS m w ter� n Yes '_ t
2
stormwater ca lc worksheet—REV.10/20/2014
III •
Start Here
Does the site have See Redevelopment
35%or more of Yes Minimum
existing impervious - '
coverage? Requirements and
Flow Chart
No Does the project convert (Figure 3.3)
Y4 acres or more of
Does'#hroject vegetation to lawn or
result n 5,000 ,„ „..,... landscaped areas,or
square feet,or No , "convert 2.5 acres or more
greater,of new plus of native vegetation to
replaced hard pasture?
surface area?
Does the project
Yes Yee No result in 2,000 square
feet,or greater,of
v
new plus replaced
All Minimum
Requirements apply hard surface area?
to the new and
' replaced hard surfaces
and converted Yes % No
vegetation areas. w1. V
Minimum Requirements Does the project have
r #1 through#5 apply to land disturbing
e
11 the new and replaced Iactivities of 7,000
hard surfaces and the Yes square feet or greater?
,n land disturbed
_ No
Minimum j
Requirement#2
applies.
Figure 2.4.1 —Flow Chart for Determining Requirements for New Development
Volume 1—Minimum Technical Requirements—August 2012
2-10
• • •
Does the project result in 2,000 square feet,or more,of new plus replaced hard surface area? OR
Does the land disturbing activity total 7,000 square feet or greater?
Yes No
Minim ' Requirements#1 through#5 apply to Minimum Requirements#2 ..lies,
the new , replaced hard surfaces and the land
disturbed.
Next Question
Does the . ject add 5,000 square feet or more of new bar. rfaces?
OR
Convert 3/4 :.. * or more of vegetation to lawn or lan aped areas?
OR
Convert 2.5 : s or more of native vegetat. to pasture?
Yes No
Next
Ques
All Minimum Requirements apply to the Is this a road
new hard surfaces and the converted related project?
vegetation areas. Yes
No
Does the project add 5,s , square feet , more of new hard surfaces?
Yes No
Do new hard surfac- •dd 50%or Is the total o w plus replaced hard surfaces
more to the existi and surfaces 5,000 square fee more,AND does the value
within the . ect limits? of the proposed .rovements—including
interior improveme —exceed 50%of the
assessed value(or rep ..ment value)of the
No \\Y\es existing site imp ements?
No addit' al
revu' : ents No
Yes No ad •nal
reauirem=
All Minimum Requirements apply to the new and
replaced hard surfaces and converted vegetation areas.
Figure 2.4.2—Flow Chart for Determining Requirements for Redevelopment
Y.:
Volume I—Minimum Technical Requirements—August 2012
241
•
• •
-.4°N
DEPARTMENT OF COMMUNITY DEVELOPMENT
W A 621 Sheridan Street,Port Townsend,WA 98368
Tel:360379.4450 I Fax:360379.4451
Web:www.eo.ieffcrson.wa.uwfcommunitydevelo, ment
4,4 n E-mail:ded c eo.let3erson.wa.us
1 O'
STORIVIWATER OPTIONS & GUIDANCE
What is Stormwater? Stormwater is rainwater that runs off hard surfaces like roofs and driveways and needs to be
infiltrated into the soil on-site' before it causes flooding and erosion,which can lead to polluted water and potential
landslides. Erosion can weaken bluffs and slopes, and damage fish habitat like streams, rivers and Puget Sound.
How do I infiltrate the stormwater? There are several easy options to choose from for most residential building
projects. Larger projects usually require engineering. Retaining native vegetation and reducing hard surfaces as much as
possible will reduce stormwater runoff and help you comply with the stormwater code requirements.2
What is required for my building permit? Keep stormwater in mind when planning your site. The Stormwater
Calculation Worksheet is required for all building projects and stormwater treatment must be identified on your site
plan (see reverse for an examplel. During construction, and after, projects must prevent stormwater from leaving the
site(refer to '2.5.2 Minimum Requirement#2:Construction Stormwater Pollution Prevention (SWPP)').
What are my options?
In order of preference from the 2012 Stormwater Management Manual for Western Washington,Volume III,Chapter 3
"Flow Control Design" (Page 3-2):
Stormwater Best Management
Option Site Conditions Practice(BMP)*Guidance
1 Full Dispersion If the lot is large and has enough retained native vegetation,the BMP T5.30 Full Dispersion
or 65/10 stormwater can be dispersed into the exiting vegetation on-site. This
option is called "65/10" or"Full Dispersion" because 65%of the
native vegetation is retained and not more than 10%of the
development site is converted to hard (impervious) surface.
2 Downspout If the lot can't meet full dispersion, then infiltration may be achieved BMP T5.10A Downspout
Infiltration using a drywell or infiltration trench. Infiltration
3 Rain Garden/ Rain gardens and swales (recessed vegetated stormwater Rain Garden Handbook for
Bioretention infiltration/treatment areas) must be considered when required Western Washington
(>5,000 square feet of hard surface). They are one low impact
development(LID)option that incorporates native vegetation and a
landscape approach to protect and beautify the property.
4 Gutter, The easiest, most common option is to use gutters, downspouts and BMP T5.10B Downspout
Downspout& splashblocks that meet code requirements. This approach provides Dispersion & Design
Splashblock less aesthetic and habitat value for the property. Criteria for Splashblocks
*These BMPs are from the 2012 Storm water Management Manual for Western Washington.
Other things to consider:
• All infiltration systems must be a minimum of 10 feet from any structure, meet all critical area buffers and setbacks
and be a minimum of 10 feet downgradient of septic drainfields.
• Depending on soils, critical areas, other site constraints and the amount of stormwater your project generates, DCD
may require engineering and/or professionally prepared plans.
« Try our Coaching Service if you have questions or concerns about stormwater on your site.
'There are exceptions to this such as a Geotechnical Report recommendation or where infiltration is not feasible because of poor draining soils.
2 Refer to JCC 18.30.070 and the Stormwater Management Manual for Western Washington for more detail.
• •
Example of Site Plan with Stormwater flow control and drainage elements
TOTAL It-kPERVIOUS SURF A-C-E ' 377(ct SQ. FT'.
ORT1+ EicISTII1/41(.. C-ORTOOKS AgE 9$OWt4
. a _
iii. . a ATIVE 441 ' * o
eg
0
I
i
PIPE WI I°*OLE t
I qt.) IR CAP Flt,10
t', 'r STI*BIL2ED OUTLET I
I r
r t
r 31e0 4 1
..4
. .
I i ,.. . , . .:„. :: *;, S7 FE 1' I :
I \.,::, ' . , : •..
› SEPTIC,
:„.„
i .
-..—,- 4.4 t
' RRINI GRIR.o€14 okikirks 1415 . DRIMPIELD,
54.FTi
.*OUSE ' ' : I
4 1
I .(I.5 54.Fr. ikt‘ 31
I 4 4
t I
W log tri. #6 I t
1 I ,
u.$
t ------ + IR
I 4 4
CI 4
II 60)04104
I I
--..... i 1 I
•—•t '
4 '
4 PRI VPFIE , :
i
WELL 4
t
RESERVE . I
DRPrIKFIELD*, :
I ,
4044SPOUT I .
3140400.4T I 4 , 1
I . ,
k f t 47
..... r i ,
--,A, ..• ,
:37,0,
" c-.
cb{t
4=1 44 CORVE4fit . 4,„.„„..._
I terE r,
ti
GRIZDENt I 0 rt I
tu
ri 1 j
t
$ r
gffittiGARDEN-180 so.FT. 2
i ogirtrAs 909 sq.Fr.
1
..,_:.(........PIPE WI l•OLE IN CAA
* JIB.
—— ;---J.' .
-- -- -- -- -- ...........
RO ROSIDE D ITC,*
G:IP1ANNINGIGRANTS-Apps&Opportunities12010 EPA GRANTSI2010 EPA-Watershed CenterIPROJECT MGMTITask F_LocalOrdinancelSWI"Handouts\Stormwater
Options&Guidance_Final 3-31-14
• •
Stormwater Mitigation Plan and SWPPP 2017
APPENDIX II
SOILS REPORT
9
USDA
United States !roduct of the National Custor�Soil Resource
ilk Department of Cooperative Soil Survey,
Agriculture a joint effort of the United Report for
N RCSStates Department of
Agriculture and other Jefferson County
Federal agencies, State
Natural
Agricultural Experiment agencies including the Area, Washington
Resources
Conservation Stations, and local
Service participants
a a¢- •ase•x�a ...,�;„„ a - \ ', ""
ffi L
q"
: ; ' 1. t
4` i: k ,14 ,-XI lit:4-"I'iit
ks
tit .;:• ''' yk: ,,,, 1. • iti,:' .i, '''':,0,04::). ., .. 1,, - ,..4,*:$ 1, i .
t::,rr IA' ' —*iilf.,,fit'f ;, l'* Vic.i.,,'- . - —' - ' ''''r''''''‘•fil:$1::.''-N- 16-4+ ''''
a' ' ,3x
' '
•
I I f I I li
8,OO ft
January 27, 2017
• •
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil
Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
• •
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at(202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or(202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
4
• •
Contents
Preface 2
How Soil Surveys Are Made 5
Soil Map 8
Soil Map (1291 Chimacum Rd.) 9
Legend 10
Map Unit Legend (1291 Chimacum Rd.) 11
Map Unit Descriptions (1291 Chimacum Rd.) 11
Jefferson County Area, Washington 13
Bk—Belfast silt loam, wet variant 13
CeB—Casey silt loam, 0 to 8 percent slopes 14
SaB—San Juan gravelly sandy loam, 0 to 8 percent slopes 14
SuB—Swantown gravelly loam, 0 to 8 percent slopes 15
Soil Information for All Uses 17
Soil Properties and Qualities 17
Soil Physical Properties 17
Saturated Hydraulic Conductivity (Ksat) (1291 Chimacum Rd.) 17
Soil Qualities and Features 20
Hydrologic Soil Group (1291 Chimacum Rd.) 21
Water Features 24
Depth to Water Table (1291 Chimacum Rd.) 24
Soil Reports 29
Soil Physical Properties 29
Engineering Properties (1291 Chimacum Rd.) 29
References 34
4
• •
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
• Custom Soil Resource Report •
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
6
• Custom Soil Resource Report •
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
7
•
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
0 Z
z V
N b
•
b R.
OZOBI£S oG6tl£5 oo6Ll 5 o u OZSLI£5 OBLLIES O 11 ES
gg M,:£S Si'°UT
M:£S Sb oZZS .:� , `c r ;4:'7:::-' ' Li
R.
vim,'
T.
O
15
..11 rgY
0 Et
ct
rnQ) VOWS
$v §_oUa)
rn d
— N`� ks Y'10, �
€ n
ti a
'-f'.71-. -,, £ .+ C�
a,
40,
rq
'"s •
f IA- N o
MN
„"
""• ' MST:90 oZZT
M:ST:9b oZZT �n
OZOBI£S 006LI£S 06fiLIES (Y)F!I£S OBBLI£S OZSLI£9 03/11.£9ObLLIES
z
z v
En
b
• III
a O N
a) co-
m N
p N (6 .a..' m a) E
7 (l) ` N N Ca us O o
m as° ° o a 0 a) o f Cl) a ° Q °
a C o U) 03 C n N 7 0E a) C U I N O •
a) co (` N ° E Cl)) aai -o (0 - o n o � ) a)
w - Y
n m U m E o C 5 7 m "O c U m m N o as E
U a'
Z .Q � � m gLo a.) -0 U E E m C/)i
0 n Ca a) ao a • o a) .
U Ca a E c a) m •. C m N U a) `� � y ..:c
a) U) E co N 3 0) a) 0 0 .c a) Q m D m °
Q N O) a) O n U) Co -O N N -O co Z co-O U) c�i E U) a
° C .L... @ c0 d C y 7 Ca Q N o L 0 ,- a)
�5�/ UQ m To E U W CaCa °) ao < ao �a ._
,(2 co
LL 7 'o U0) co L a) U U) O N c n N m T n a) m cm o a a
O 03
O • a) T
T > LO� ooa) a) v o ° w 3 0 n 0 ma QE
LL a) —_ c oc 0 a) ami Cl) o v E m U U) _c E T co a,
Z a C a3 O L a) 2 - .O 6 O a C 0-
CL a) .
0 °."a) N Ca - a 7 U) U O V) -O 0 O N N a a) f0
CL o c min ° U ° � 0 oo CO '� ° a � � �
U T a y m 0 U) o N U o U) s_ n 7
Q Ca N 2 U m O J (/) V) n C N Ca a) > a U) .c -0 O
(0 n 0 N ( a Ca Q' a Q o C a`) v) -1 m m a) c a
N a) w a) Z : N N °- m Ca .2 N 0 N CO O " a 'C
a) ° c O C w n Z T a) m Ca O V) as
,- 0 N ° a co n
C co2 • o c Ca a) n o ° co w 3 su co v .o < co c Ti c n as
N v) a) E m >, E _ ci) a E - C a U a ` > 0 a o` a`) n m n E
O o m aEi °)om .� `) a) ° 'oc 20 a) aa)) a) o0 ZQ as a) c0 � o
O C' .- m e Q. 2 a) co N V a U) N c N (6 O- N cn N E N CD p .aa) c
a) �N m co N N C m co co 7 a O n Ca N p C0 c — Z — C' .a).. o)._
.c . C O U N a) p a) p m 0 V) a U LE v-. O 3 O m — a) E co
F- W E _ O co d E U 55 U 2 n=o Q m F- o c/) v) CO — O N H O ._ (an
_.... _.
0
0_
a)
CL
(1)
U
n
O
O
O O
cc
O
cr) w
N N U)
C T
C w c Tp t
m Q
Q m
U a m
co cc) a m N . co
= m p >. C C I U) a V O
U 2 a o o -' o, a) a) m0 0 t
Q T 0) N _ m E o o 0-
- c Z m u `o m m
u) i)) > 0 v) 2 in 0 5 co 2 3 Q
0 so a
Q : : ; :
wJaG - n a a. « a 0 0 C c n a w o
Q o m m m y o 3 c, -o a) a) = LL t o m c O U) a) m
0 0
m 2 2 2 LL 3 2 >, w > > co (`, a) CU 0 ac) Y c -o Cl) L a) U
E < u) co Cl) - m m U 0 C0 0 _ _1 2 2 d I U) U) u) Cl) (7 U)
a) C
c
R 9
Custom Soil Resource Report
Map Unit Legend (1291 Chimacum Rd.)
Jefferson County Area,Washington(WA631)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
Bk Belfast silt loam,wet variant 3.2 16.5%
CeB Casey silt loam,0 to 8 percent 0.5 2.4%
slopes
SaB San Juan gravelly sandy loam, 15.5 79.3%
0 to 8 percent slopes
SuB Swantown gravelly loam,0 to 8 0.3 1.7%
percent slopes
Totals for Area of Interest 19.6 100.0%
Map Unit Descriptions (1291 Chimacum
Rd.)
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
11
• Custom Soil Resource Report •
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
12
Custom Soil Resource Report
Jefferson County Area, Washington
Bk—Belfast silt loam, wet variant
Map Unit Setting
National map unit symbol: 2gg1
Elevation: 30 to 980 feet
Mean annual precipitation: 50 to 70 inches
Mean annual air temperature: 50 degrees F
Frost-free period: 170 days
Farmland classification: Prime farmland if drained
Map Unit Composition
Belfast variant, wet, and similar soils: 95 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Belfast Variant,Wet
Setting
Landform: Flood plains
Parent material: Alluvium
Typical profile
H1 - 0 to 9 inches: silt loam
H2- 9 to 20 inches: silt loam
H3-20 to 60 inches: stratified gravelly fine sandy loam to clay loam
Properties and qualities
Slope: 1 to 2 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Poorly drained
Capacity of the most limiting layer to transmit water(Ksat): Moderately high (0.20
to 0.57 in/hr)
Depth to water table: About 6 to 12 inches
Frequency of flooding: Occasional
Frequency of ponding: None
Available water storage in profile: High (about 10.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 5w
Hydrologic Soil Group: C/D
Other vegetative classification: Wet Soils (G002XN102WA)
Hydric soil rating: Yes
Minor Components
Belfast
Percent of map unit: 5 percent
Hydric soil rating: No
13
• Custom Soil Resource Report •
CeB—Casey silt loam, 0 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2gq9
Elevation: 0 to 390 feet
Mean annual precipitation: 30 inches
Mean annual air temperature: 45 degrees F
Frost-free period: 60 to 200 days
Farmland classification: Prime farmland if drained
Map Unit Composition
Casey and similar soils: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Casey
Setting
Landform: Terraces
Parent material: Glacio lacustrine deposits and/or marine deposits
Typical profile
H1 - 0 to 17 inches: silt loam
H2- 17 to 33 inches: clay
H3-33 to 60 inches: stratified loamy fine sand to clay
Properties and qualities
Slope: 0 to 8 percent
Depth to restrictive feature: 10 to 20 inches to abrupt textural change
Natural drainage class: Somewhat poorly drained
Capacity of the most limiting layer to transmit water(Ksat): Very low (0.00 in/hr)
Depth to water table: About 12 to 24 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Low (about 3.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3w
Hydrologic Soil Group: D
Other vegetative classification: Seasonally Wet Soils (G002XN202WA)
Hydric soil rating: No
SaB—San Juan gravelly sandy loam, 0 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2gt2
14
• Custom Soil Resource Report •
Elevation: 0 to 300 feet
Mean annual precipitation: 18 to 30 inches
Mean annual air temperature: 48 to 50 degrees F
Frost-free period: 210 to 250 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
San Juan and similar soils: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of San Juan
Setting
Landform: Plains
Parent material: Glacial outwash
Typical profile
H1 - 0 to 17 inches: gravelly sandy loam
H2- 17 to 60 inches: gravelly coarse sand
Properties and qualities
Slope: 0 to 8 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Somewhat excessively drained
Capacity of the most limiting layer to transmit water(Ksat): High to very high (5.95
to 19.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Low (about 3.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3s
Hydrologic Soil Group: A
Other vegetative classification: Droughty Soils (G002XN402WA)
Hydric soil rating: No
SuB—Swantown gravelly loam, 0 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2gtb
Elevation: 0 to 690 feet
Mean annual precipitation: 18 to 35 inches
Mean annual air temperature: 50 degrees F
Frost-free period: 210 to 230 days
Farmland classification: Not prime farmland
Map Unit Composition
Swantown and similar soils: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
15
• Custom Soil Resource Report •
Description of Swantown
Setting
Parent material: Till
Typical profile
H1 - 0 to 5 inches: gravelly loam
H2- 5 to 13 inches: very gravelly loam
H3- 13 to 22 inches: very gravelly sandy loam
H4 - 22 to 60 inches: very gravelly sandy loam
Properties and qualities
Slope: 0 to 8 percent
Depth to restrictive feature: 20 to 30 inches to densic material
Natural drainage class: Somewhat poorly drained
Capacity of the most limiting layer to transmit water(Ksat): Very low to moderately
low(0.00 to 0.06 in/hr)
Depth to water table: About 6 to 12 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Very low (about 2.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: D
Other vegetative classification: Wet Soils (G002XN102WA)
Hydric soil rating: No
16
• •
Soil Information for All Uses
Soil Properties and Qualities
The Soil Properties and Qualities section includes various soil properties and
qualities displayed as thematic maps with a summary table for the soil map units in
the selected area of interest. A single value or rating for each map unit is generated
by aggregating the interpretive ratings of individual map unit components. This
aggregation process is defined for each property or quality.
Soil Physical Properties
Soil Physical Properties are measured or inferred from direct observations in the
field or laboratory. Examples of soil physical properties include percent clay, organic
matter, saturated hydraulic conductivity, available water capacity, and bulk density.
Saturated Hydraulic Conductivity (Ksat) (1291
Chimacum Rd.)
Saturated hydraulic conductivity (Ksat) refers to the ease with which pores in a
saturated soil transmit water. The estimates are expressed in terms of micrometers
per second. They are based on soil characteristics observed in the field, particularly
structure, porosity, and texture. Saturated hydraulic conductivity is considered in the
design of soil drainage systems and septic tank absorption fields.
For each soil layer, this attribute is actually recorded as three separate values in the
database. A low value and a high value indicate the range of this attribute for the
soil component. A"representative" value indicates the expected value of this
attribute for the component. For this soil property, only the representative value is
used.
The numeric Ksat values have been grouped according to standard Ksat class
•
limits.
17
•Z
•
N Z
• EnO
b
03331.£5OB6LlE5 06fiL1E5 006L1.£5 �BLLE9 OZ9LLE5 WLLlES 017221.29M,£S,Sb oZZi ,.. M M.£S Sb oni
o
Yi
_._.__.,.., ,,,,:........._ _,,,,,...n.........._ ,.,,,.,.,,o —
...._... __...,
-44;%::*'-*Y '''' ''''' a ''' ..-'''''1'11: '#;''''''' '
•
L o
U
o
R
P
N u
Q
OV
co
i8(Es
U
NCOO
E 0_
U Chmacum� E 2 ua coL
11
06 713
P
2
E
to
2 Q
, Q E 8 2G
o. ,
= o
,q o
:'21o g�
-,p
- ati12
? a. "* ar �S [ El
y
4w
ftrZZ Q
;
M,ST,9b oZZT .<-' _ _
MSI,9b oZZT
OZ�lES CL6LLE9 Ot6LIES Oe6LLE5 09BLLE9 CY8LLE9 OBLLlES 017221.£gz
Pi z
b
• •
us o6
•
N @ N
a) O N N w "o ca cii N
• 7 @ N N mflI
co O °@ •
c U N N @ L fn o o N@ cp o N N -o C n n 7 N E 7 U a) @ N O@ E
Z E ate `—° `° o � as ci) C Co 92 Cl) N rn ci) .
O n m a) ao n w U @ o w .:c
N U E N c Z M al N Q d CC O L 7
Co @ ?� U) d CJ N Z Z N U E N .
N (4 (6 O N >
Q .N 4- o)g: _ n c d Na N � (6 Q N N p N L ,_ N
2/ p m 'Q 0 CJ W a _ com al CO Qao m n c N _o
al 2
• o> m a) m u �°0
LO 3 o n o @ a n E
7 U 112 c '� U N O E T@ N
> a � C m C of Z � '� m � Eos c c Co -c a.) _u Eay -
LL N _o c 0 0 L N N 7 o -.(--5 o (O/`f o N@
Z E c >,V CI) 0
� Z .o n a � � a) Co a) s Q� �
0. a) a) .o CD - o ° �' a) a) 3 a)
Q U N N E U .7. J (n N n c0 U N N > L O O
c0 E n o o C L Q U c us
• L.- n @ L .L.. Cl) Z ❑ E O n (6 @ .2 a) N N as ' c
as E
T p _Q C � c0cfi tl j N @ U .N 13 2 c0 ❑ N L -O @ N
in o - Ern � E as 2 � a) � c � � � m > cu ao 45 n@ = E
Co E 0 a) .E m o o — m o o a) 0 a) 0 0 2 Q no co 0 cs o
'p o c' a,-Oo N co N 7 8 Cl) : V-- ..0 C N N n > c7 E O N O n N m
o
fA O i @ 7 n N N N 7 4 p d.4?w N U Co — — O ` N E m
L N @ c 'N C O U N Q) O N p @ O Co L U L :: 5 7 O c) @ 0O L p L
1— .- �i W E = U c J d E co 5 O 2 0;15 Q@ H O co co U) - ❑ N H. U ._ Co
t
0
0-
a)
IY
a)
U
L
7
0
CO 0)
Na) 0)
I..L
0
TE I
t
n
0 `6
N N m2.N @ @ L
U o IX W a
K `oTo m
co @ oa�
D _ia
c
CI 'o
Z
W x
/�
V m
W
J O O 0 4) O N
0 N , @
a.. M ON ,j ,
- o
co o N
Q Q CO0 CO 0) @ N 01 @6 6 co @
cous
C @
v v v o v v v o v v v o 0 r
N 92 _O _O ,O C C "O 'O 'O C m
CO C C C o C -C C O @ @ @ 0
'O _
C O @ (6 @ 0 @ @ @ 0 .O @ N
C O t O N -0 N V O N co
O Cl 0 V „..) r O CO O V Co N- N C 0 0 ` n E N
< o > m o a CD CO 0 @ @ m
CO O CO C N co O co O N (O O CO N _
N N d N N CO co O - �� N CO CO p d �� N CO co O N c @
E Q ol v A A A Z CD V A A A Z m V A A A Z :.' v) O o 5.
y C C C w m
R
j
03 re cs
a ® ® ®0 ."Ri 0
0 W
• Custom Soil Resource Report •
Table—Saturated Hydraulic Conductivity (Ksat) (1291 Chimacum
Rd.)
Saturated Hydraulic Conductivity(Ksat)—Summary by Map Unit—Jefferson County Area,Washington(WA631)
Map unit symbol Map unit name Rating(micrometers Acres in AOI Percent of A01
per second)
Bk Belfast silt loam,wet 5.0132 3.2 16.5%
variant
CeB Casey silt loam,0 to 8 2.6040 0.5 2.4%
percent slopes
SaB San Juan gravelly sandy 92.0000 15.5 79.3%
loam,0 to 8 percent
slopes
SuB Swantown gravelly loam, 18.8171 0.3 1.7%
0 to 8 percent slopes
Totals for Area of Interest 19.6 100.0%
Rating Options—Saturated Hydraulic Conductivity (Ksat) (1291
Chimacum Rd.)
Units of Measure: micrometers per second
Aggregation Method: Dominant Component
Component Percent Cutoff. None Specified
Tie-break Rule: Fastest
Interpret Nulls as Zero: No
Layer Options (Horizon Aggregation Method): Depth Range (Weighted Average)
Top Depth: 0
Bottom Depth: 60
Units of Measure: Inches
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly
measured, but are inferred from observations of dynamic conditions and from soil
properties. Example soil qualities include natural drainage, and frost action. Soil
features are attributes that are not directly part of the soil. Example soil features
include slope and depth to restrictive layer. These features can greatly impact the
use and management of the soil.
20
Custom Soil Resource Report •
Hydrologic Soil Group (1291 Chimacum Rd.)
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential)when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
21
z • • Z
ER.
b b
OZtIBl45 OBfiLLfS 066L1E5 mr,/L£S W3D.CS OZ8LLE5 08LL1£5 06LL1£S
M£S 5b oZZI S2 M.£S Si'oZZT
6
6
t3 �
6
rme -� ' ' a —cx ro
3m
T.
"
fi
Ga
E
O
CJ
L E p.t
O r
1. T Pa _
O Q J�Gs
e
hv
OCV
cc
N
7-„ct.-1--.
€ R .�a«. ��: „Ch1� �` �" �,
a�
CU
o �;� ;:,,ilii Er,
N *" `" xe ,.tc i say ' � p o O5
S(
d
N r:','-'.`r 6
. ,
..
z ,,,I....,ii„.,,.,....: • . i.,::.:.:,..„fi.,i,.i. I..:...:i;.,:::.,:o:...!.,,:::....,4,:;:d„.,..::;..:,.„i•,..!•,:.:...;Eoa7,....ic•.•.,..4.:,,:ff.,,:. „, ,.".",... ..:,....„..„.„,,,..„,:,.......7
"1.,:,", ,..,...,. .""„„•.----,.-,:,...-. .
i �,. ti, :ii,igii:..1-,,,'"ivrtv,,,...gt.,..!.::.:',.:“"r:::,.i.,s,iwfillrlogtwz':41,..,::,-
litto
,.�a: :a. ^r a: a ria
."..:..i,_,,..4:;._..,:3:t;;:„,,..,:.2,..„......
may:"�^ ,3 w: .�,° � " `�'i 4 �'�. ^;y �� may,"�
P4'..:,-,..'.,•::-;iir.'-gfr-
Z
M,ST,9b oZZI ,n .y, �, `,;
- .. - � M.5S,9b oZZT
OZOBLES OB6LL£S 066LLE5 (YK/LE5 W_BLLES CY8LLE5 OBLLLES OWLLfS
z
z
b
a
• •
I
u) au
a) CO N
a) p 5 co �6 m N
7 N a) a) N O N co a N i UI .
-Hi1i
a3C U O V)m c%iaia oN O. a) 'O . U c a)O ON
OTo
al cp co Cr_ V) 7 N (.,) a) O ' w .L.. .%C
Cl)N as C O M O � a) � c � c Oa
o 0 Ecom aa) o c z N vEw
Q3 co o m Y o c aa) -o vcn o, -o co m Q 2 oN 3o m s o aa)
C a y a) .n 3 0 E U w m L Q ao m n 0 N CO
G Q c6 N o- O C t V) Q c Q. N o U o < T
3 'O N co . N Uas N f0 O a) 7 CO a) 01 Q. - U! CO
O o a) as m ow o aa) 3 o n o
as nE
O i T N O u! O E >' a) N
> a) � occ > c o a) a) covc Ea) U N L sEa)
ZQ o a) a s °) CC - m ci) ao) o w -o g o a a) o m a
Eo C Ta Q 7 U (0 Cl) Z o O a a) N N Qy c
0. a) m U a) 3 m
Q U N N omco.. E U al 3 J )n o- C co V) L a) C
ca E O-o ) c9 Q t4 Q Q U C N o }N—, O .+
- Q. a3 .0 a) Z D E N O- (6 a) 0 a) ..0. • ii c) co o .m a c
E E CI— w w T� ?� a) a) )1 E o � T ,
NO a c 'c c .N. 0. > T a) L a) a) U al To .N C 0 U) as O 'O co a)
a �/) 0 c O U) �. 'D O < f0 c L o u)
o c°) aci � Ea > E � u) a; Ecm2U = � aia) � o 0 oas E
E a) .s a) o o — m 20a) a0) i)) oo ZQ ao m L D o
o o Co a co a) 7 U(J) :p U C ` N Q N E O O p_ a) C)
uoo E a) ao ai mm = _ao n.a?� a) a U) c — Z — 6 ci) a) E0
L N O C 'u) O U O O o N O a) O N Q U L ..- O O O a) O . O E
1— , w E . o u) a E co O o_=o Q a) E- o co cn cn :- 0 N U .8 u)
t _
0
0_
(1)
Ct
a)
U
L
D
0
(.0 CO
O N
CC
a)
O m
> t
To >,
p C co
n
c U m to_
a m u) o
7 o m o o
U a-°) E m o CC c a
`° co co
4,-,.., IX o o CO
0 p N N c .@ u) N UO N
o U 0 z 2u O 2' 0 3 —1 a <
ca c
0 co
co O
Z 0 ■
LUcc
CD
?� ~ m
LUJ
CL `) —
Q °aas cico
Fs
2o
a) C C
d
a) co O O
ON a) 4O 0 N a) C
Q O T CO
V) d 0 0 0 o J 0 0 0 o Cl- 0 0
22 < m < < 0 0 0 0 0 z Cf < < 0 Co 0 0
O 0 z , < < 0 0
m __ c c
IP IPC c0 CO
O
cu Q W
• Custom Soil Resource Report •
Table—Hydrologic Soil Group (1291 Chimacum Rd.)
Hydrologic Soil Group—Summary by Map Unit—Jefferson County Area,Washington(WA631)
Map unit symbol Map unit name Rating Acres in A01 Percent of AOI
Bk Belfast silt loam,wet C/D 3.2 16.5%
variant
CeB Casey silt loam,0 to 8 D 0.5 2.4%
percent slopes
SaB San Juan gravelly sandy A 15.5 79.3%
loam,0 to 8 percent
slopes
SuB Swantown gravelly loam, D 0.3 1.7%
0 to 8 percent slopes
Totals for Area of Interest 19.6 100.0%
Rating Options—Hydrologic Soil Group (1291 Chimacum Rd.)
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Water Features
Water Features include ponding frequency, flooding frequency, and depth to water
table.
Depth to Water Table (1291 Chimacum Rd.)
"Water table" refers to a saturated zone in the soil. It occurs during specified
months. Estimates of the upper limit are based mainly on observations of the water
table at selected sites and on evidence of a saturated zone, namely grayish colors
(redoximorphic features) in the soil. A saturated zone that lasts for less than a
month is not considered a water table.
This attribute is actually recorded as three separate values in the database. A low
value and a high value indicate the range of this attribute for the soil component. A
"representative"value indicates the expected value of this attribute for the
component. For this soil property, only the representative value is used.
24
• • z
z
b
OZOBL£9 C96L1E5 076L1E5 006LLE9 099LLE5 OmLLE9 c LLL£9 Ot'LLL£5
Zii
M.£S Sb olli N M,.£S Sb 0ZZ1
r
Z
Z
0
'',-:2r
r n
7
e a
E P
U
(6
0 U �
i N n ( k
M
O (1.) LU
N Q 4 E N
(0
2
oE
I !: a f o
N
U Q �,, m Fid
D Gh�ma�u .
Lu
En
E
its
owe
,-. L
o
o o
+, N m 8 C
Ei
'L, ';--- g i
a GI a
O O
$
'» • a te.'." " '" z
0M,ST,9b oZZS
M,SS.90.lli ZOZOBL£9 OBfiLLE9 06fiL145 OOfiLI£9 0;43L1.£9OZBLl45 0R//l£5 06LLLE5
z
z a
F1-1
b
! 0
co-
13
:LI)
O 2 a) N
a) O - cu co Cr) N
7 U) . ` y N co O N
..(1:1
ID
@ o ,F N a) N (6 0 Q 3
VI
@ c U N 0 E N U O a) c U I a) o -c
a 0 E `o E a) a N E � o o c � E
n 0) U a) 0 .N a) c N N - U E
@ c U 0@ 0 ^ O Q N U j U O aS E
O ai 'a as in w u 0 CO s E of u, Q o
aan) m m m co a = a)) U m o a) m °
0 co c E c a) ch-c c @ ° -, www c
Q ° 0)L a C aD -0 N 'o CO Q a N >i 'O U O N -°
LE a) a. w _
5 oCUc 0@ 0 a) r � °
`° `°° Q3c E U W asaL `) Qao m _c c co
m
a v°i @ aoi 0 0 o c @ > a a) m O a) Q
r sa
a) o 0 0 >
o > a) E w m ca v o w 3 cq m o n a)
CL
V' • °) o c m o y• m a) L- o v E a) U 0.
�) L E @ co
Q o O a) Ta a'• Q ° u) U O ,- a ° O u1 Q a)
CL E c >m n ° m ° co Z o ° a o ola a) Q 2 @o
< -.(-6
° a) V) .- MI 0.. E .U. u) 7 J ° y °-'C ° N 'N N > N >j .'c-+ 0
@ N Q N L O
w E m o ° Q a) Q `) Q v c co u^) — a) a) c Q
E rn= a) Z E >a) a ai al m a) a) m ° .N-- °
N c '"- O .L.. >'� > j N @ 01 a) @ - a) a3 0 Q1 w c
o a c o C 0- >, a) LE co ca 0 a m 0 N rn o cv a
(n "E@ a) u) o. 0 co c c Y 3 a a3 U c0 ¢, 0 @ O '0 n E
Et)) E 2v) E c co 0 o am — E
— o o) a) o N o .o o o a) m a) o a) Z Q a o a) t -o a o
N O c a)-o @ 0 • a) c a) c c i m n > c >, moo n °_) Z` o)
a) N i c`a m w a)CI c m f6 @ o Q 0 n.a? m a) o o - .E O a) o E_ c c
c c — c o U ° °' o ° o a) o cn Q 8 o ° o @ o L E co
E
H - 5 w E _ U u) a E cn U n-o Q@ f- o N c0 to o N H 0 ._ 0
t
0
0
a)
CC
a)
U
L
m
O
N
a) co
a' N
a)
O Fa
CO ,12
@ C (p .0
0 @ Cl
+. 0 r m
) c p ) N N O
0 c 2 N 0 a
°) E asco o
c w w a
@ @c, N w 0 To 1O
O ` c @ co @ O a)
Z u) O K c n 2 J <
3 'O
Q @ C
coO t 7
Z ® LL O O
W
y N c
11C g
- @
U' 3 m
W
Ja) a)
CL
@ @
<
o .c-ii -
Q
a, ciscpo
O c c
O 0C
Q 0> O 0N ON CD0 LO N CaCD CD
TZ. OO LC) 0
o OQ t• c 0
0 00. CO 1 1 O N .- CO CO � N
O@ N O O 0 N , O O 0 N i iN O
O
d Q 0) 0 N C) O0 Cr) A Z- J (N O O ( N O d i i() O O CO N
a) c 0) O N CO A Z c O N CO A
_ c c
- - —
_ x t ; D D D D
Q =0
o u) u) v)
• Custom Soil Resource Report 0 -
Table—Depth to Water Table (1291 Chimacum Rd.)
Depth to Water Table—Summary by Map Unit—Jefferson County Area,Washington(WA631)
Map unit symbol Map unit name Rating(centimeters) Acres in AOI Percent of AOI
Bk Belfast silt loam,wet 23 3.2 16.5%
variant
CeB l Casey silt loam,0 to 8 146 0.5 2.4%
percent slopes
SaB San Juan gravelly sandy >200 15.5 79.3%
loam, 0 to 8 percent
slopes
SuB Swantown gravelly loam, 123 0.3 1.7%
0 to 8 percent slopes
Totals for Area of Interest 19.6 100.0%J
27
Custom Soil Resource Report •
Rating Options—Depth to Water Table (1291 Chimacum Rd.)
Units of Measure: centimeters
Aggregation Method: Dominant Component
Component Percent Cutoff: None Specified
Tie-break Rule: Lower
Interpret Nulls as Zero: No
Beginning Month: January
Ending Month: December
28
• Custom Soil Resource Report •
Soil Reports
The Soil Reports section includes various formatted tabular and narrative reports
(tables) containing data for each selected soil map unit and each component of
each unit. No aggregation of data has occurred as is done in reports in the Soil
Properties and Qualities and Suitabilities and Limitations sections.
The reports contain soil interpretive information as well as basic soil properties and
qualities. A description of each report(table) is included.
Soil Physical Properties
This folder contains a collection of tabular reports that present soil physical
properties. The reports (tables) include all selected map units and components for
each map unit. Soil physical properties are measured or inferred from direct
observations in the field or laboratory. Examples of soil physical properties include
percent clay, organic matter, saturated hydraulic conductivity, available water
capacity, and bulk density.
Engineering Properties (1291 Chimacum Rd.)
This table gives the engineering classifications and the range of engineering
properties for the layers of each soil in the survey area.
Hydrologic soil group is a group of soils having similar runoff potential under similar
storm and cover conditions. The criteria for determining Hydrologic soil group is
found in the National Engineering Handbook, Chapter 7 issued May 2007(http://
directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=17757.wba).
Listing HSGs by soil map unit component and not by soil series is a new concept for
the engineers. Past engineering references contained lists of HSGs by soil series.
Soil series are continually being defined and redefined, and the list of soil series
names changes so frequently as to make the task of maintaining a single national
list virtually impossible. Therefore, the criteria is now used to calculate the HSG
using the component soil properties and no such national series lists will be
maintained. All such references are obsolete and their use should be discontinued.
Soil properties that influence runoff potential are those that influence the minimum
rate of infiltration for a bare soil after prolonged wetting and when not frozen. These
properties are depth to a seasonal high water table, saturated hydraulic conductivity
after prolonged wetting, and depth to a layer with a very slow water transmission
rate. Changes in soil properties caused by land management or climate changes
also cause the hydrologic soil group to change. The influence of ground cover is
treated independently. There are four hydrologic soil groups, A, B, C, and D, and
three dual groups, A/D, B/D, and C/D. In the dual groups, the first letter is for
drained areas and the second letter is for undrained areas.
The four hydrologic soil groups are described in the following paragraphs:
Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
29
• Custom Soil Resource Report •
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
Depth to the upper and lower boundaries of each layer is indicated.
Texture is given in the standard terms used by the U.S. Department of Agriculture.
These terms are defined according to percentages of sand, silt, and clay in the
fraction of the soil that is less than 2 millimeters in diameter. "Loam," for example, is
soil that is 7 to 27 percent clay, 28 to 50 percent silt, and less than 52 percent sand.
If the content of particles coarser than sand is 15 percent or more, an appropriate
modifier is added, for example, "gravelly."
Classification of the soils is determined according to the Unified soil classification
system (ASTM, 2005) and the system adopted by the American Association of
State Highway and Transportation Officials (AASHTO, 2004).
The Unified system classifies soils according to properties that affect their use as
construction material. Soils are classified according to particle-size distribution of
the fraction less than 3 inches in diameter and according to plasticity index, liquid
limit, and organic matter content. Sandy and gravelly soils are identified as GW, GP,
GM, GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH, CH, and
OH; and highly organic soils as PT. Soils exhibiting engineering properties of two
groups can have a dual classification, for example, CL-ML.
The AASHTO system classifies soils according to those properties that affect
roadway construction and maintenance. In this system, the fraction of a mineral soil
that is less than 3 inches in diameter is classified in one of seven groups from A-1
through A-7 on the basis of particle-size distribution, liquid limit, and plasticity index.
Soils in group A-1 are coarse grained and low in content of fines (silt and clay). At
the other extreme, soils in group A-7 are fine grained. Highly organic soils are
classified in group A-8 on the basis of visual inspection.
If laboratory data are available, the A-1, A-2, and A-7 groups are further classified
as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional
refinement, the suitability of a soil as subgrade material can be indicated by a group
index number. Group index numbers range from 0 for the best subgrade material to
20 or higher for the poorest.
Percentage of rock fragments larger than 10 inches in diameter and 3 to 10 inches
in diameter are indicated as a percentage of the total soil on a dry-weight basis. The
percentages are estimates determined mainly by converting volume percentage in
the field to weight percentage. Three values are provided to identify the expected
Low(L), Representative Value (R), and High (H).
Percentage (of soil particles)passing designated sieves is the percentage of the soil
fraction less than 3 inches in diameter based on an ovendry weight. The sieves,
30
• Custom Soil Resource Report •
numbers 4, 10, 40, and 200 (USA Standard Series), have openings of 4.76, 2.00,
0.420, and 0.074 millimeters, respectively. Estimates are based on laboratory tests
of soils sampled in the survey area and in nearby areas and on estimates made in
the field. Three values are provided to identify the expected Low (L), Representative
Value (R), and High (H).
Liquid limit and plasticity index (Atterberg limits) indicate the plasticity
characteristics of a soil. The estimates are based on test data from the survey area
or from nearby areas and on field examination. Three values are provided to identify
the expected Low (L), Representative Value (R), and High (H).
References:
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
31
• •
:'15
c U U
0) 01
M My C M M 1 M �03 • a a o "' O
O
CL Z Z Z I �
6 1- C') - M 0 M OM O
M co In Co
J J 00 0 0 U) O O
N V V
L I
_ � L Q Z
o Lo co LO
• C E J o �
°O I N o � . 0 . 0 � rn
N N ,-- M co
O �(j
W O I a00 its co Lo W O 60) O c)j O
O y J O O N 0 O 0
• U a) W N N- O O
J V)
C• N "C R O OOp m0 000
N 7 Q r O' r � O a") O pM) O
0 7 > ) N J 1 O )o Lf) O O O
co a)
0_ co Q I O O W co W
N 'C N co = 0 O 1 0 0
N .- co a) ` O O O O 0) O 0) O m O
.0 N ate-+ d J p O 0 O in O O O
O N C al rn rn
O 0 U C C . r 0 0 0 0 0 0
jM•C O 0
O 0 O 0
1:3 E a) O OO O O OO R
OQ'O (0 LL co =
Q U) U -C N `1 V O O 0 0 0 0 0
N c O 73 Q d A C J O O O O 0 0
CY N O - O C O 0 0 0 0 0
U c6 -0N Q C 0 I
o F
U) N p
a) -O . a 4) i W Q I N (fl n r
Ct a) a) a) ° a ¢ a ¢ a Q N
cn E .E .� ' 7 d
E u) E fp th v 0) 0 0
i J J J I
p Q 2 2 2 U U U
= C -o No
U C co daT i o ,
o � UJ lc E _ >,E y
C 3 N ( N
(0 0 LC) a) w c (6 EN t0
-0 0 -0 �t 7 c t E E e, 2 o E >,U a o
COu) as w
N N
-C -C w W O O N N N CO U >'CO - C
w
li 0)2 U) Cl) U) (7) U) I U)
- (A
O
N Ncs. C = I O O M O
X (U (O c,-)
(o
N C Q O) N O
0 _C ._
O >,'o)O
C U o O 7.r.,
2 � U o
Q) Uit- al _
al m
X m CO
o a) _ E
C c
a
cn N o_ o E m °
O Z Q N p o 3 0
< o 2 O C E =
y
C ° c - >, 0
«__ a' co c`,5 a) -
E :° c`a f, a
O U1
m 13 a) m m
2m m U � U
• •
V) � n co Lo
Mo co co
EL T Z Z Z z Z z
t
-.C' COO 7 � o LO r Wp
(NI N M N M
J J O O O O' Lo
LoO
0) N ci N 2 O V LU N O `N o o
M N
C
{ONOods C sr O coo N
RtJ 6t) p O O O O
C) V N ... _. co _.. N
C _.. ,
(/) I M O CO I CO NLO
O. 00 co o i) O M COO - 2 , Co
r
a)C J L co L V
L co
)
as
N L O a) CO CO lD C
T O ce O) CO O co o 1 0 L o O iD r
0.
) J 0oj O N- co Lc I o 0
C
0 o
N o N _ o o o
C C r' V ct
O' O' O CO 11 CO o
t N ca EM,C J
co I
i-' t6 LL Q. 0)) _ O O O o o O
0 ° ar e- c O O O O 6 6
U
6 6C
U O N
Q x Q
7 MO CO Q MO vQ Q QN et
iV Q Q Q
a
cn U
O
d _ U) 0 0 0
o 0 >,
7 L, > T a
TS
LA oi 0 > N T >+ cp >+ cp
w E c co o >C E > �' > E >, > E >,
ai :3 C m cu ° as o a) � as OU � a)
0V) T 01 > > Q1 O > C7 O >
Ch >• T u°)i a) a v°)i > co E- - >,E a `o1E a `o1E
W _ > > oo Z o o N o y Z o
m o co" 0) U E a) a) a)
C� 0
.0
= N- c0 o N c0
N
N
0 O p 1 in N
2 Q
O V O
8
T. L
co 0
0
0
w o 0
Oa._ I
a E ' '
m o
_ o _
C co > N c o 1n
.O c -o 3 E N
E E 1 m c m o m
p
c - w m Tn c
CA
o m > n >'c o
EW cooD
I >
E2
N cac mQ. A,@ )O o
• I
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/
arcs/detail/national/soils/?cid=n resl42p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://wvvw.nrcs.usda.gov/wps/portal/nrcs/detail/soils/
home/?cid=nres142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepasture/?cid=stelprdbl 043084
34
• Custom Soil Resource Report I
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http:/lwww.nres.usda.gov/wps/portal/
nres/detail/soils/scientists/?cid=nres142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http:Uwww.nres.usda.gov/wps/portal/nres/detail/national/soils/?
cid=n res 142 p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf
35
• •
Stormwater Mitigation Plan and SWPPP 2017
APPENDIX III
PROJECT PLANS
10
II I
Stormwater Mitigation Plan and SWPPP i 2017
5.0 THE LIMITATIONS OF THIS REPORT
This report has been prepared for the exclusive use of Keith Rasmussen for the proposed site
improvements mentioned herein. The recommendations in the report apply only to the
property that was evaluated and they are not transferrable to other locations. The
recommendations contained in this report are based upon site conditions as they existed at the
time of our studies. During construction, if subsurface or other conditions are discovered that
are significantly different from those described in this report, JCW should be advised at once so
that we may review the conditions and reconsider our recommendations, where necessary.
We recommend that a contingency be established in the project budget and schedule to cover
unexpected conditions.
Within the limitations of scope, schedule, and budget, our services have been executed in
accordance with generally accepted professional engineering principles and practice. This
warranty is in lieu of all others either expressed or implied.
Sincerely Yours,
JC Wilson Engineering
tyu. titit
.... ' la
Iz. 45910 Q _,,t
•d( c isi Sk /\
S/ONP
, )1:14(PA,
J. . in Wilson, PE
r ncipal Engineer
0 7 Y
,____,i
7