HomeMy WebLinkAboutDrainage and Erosion Control 901113004G:\PermitCenter\###FORMS###\DRD\Stormwater\stormwater mgmt permit_FINAL.doc REV. 10/20/2014 Page 1
DEPARTMENT OF COMMUNITY DEVELOPMENT
621 Sheridan Street, Port Townsend, WA 98368
Tel: 360.379.4450 | Fax: 360.379.4451
Web: www.co.jefferson.wa.us/communitydevelopment
E-mail: dcd@co.jefferson.wa.us
STORMWATER MANAGEMENT APPLICATION
Purpose
All new development and redevelopment must conform to the standards and minimum requirements set by the
Washington Department of Ecology Stormwater Management Manual for the Puget Sound Basin (SMM) currently
adopted by Jefferson County and be accompanied by a stormwater management permit if required by JCC 18.30.070(5).
You will submit a Master Land Use Application Form in conjunction with this supplemental application. The
Administrator may require additional measures as indicated by the environmental review or other site plan review. For
projects that involve a building or land use permit, stormwater review will occur as part of your overall application
review. A stand alone stormwater management permit is required for clearing and grading activities exceeding 7,000
sq/ft that do not involve a building permit or other land use approval (ie. preparing land for future construction,
clearing for speculative purposes, etc.).
A stormwater management permit is required for the following activities:
All grading of 500 cubic yards or more; except for those activities exempted under JCC 18.30.070(5)
All clearing and grading activities within environmentally sensitive areas as defined within 18.22 of
the JCC;
Land-disturbing activities of 7,000 square feet or more; or
Creation of 2,000 square feet or more of impervious surface
Exempt Grading Activities
The following activities are exempt from the requirements for a stormwater management permit (if located outside of
an environmentally sensitive area) under the provisions of 18.30.070 of the JCC:
Maintenance of gravel roads;
A SEPA-exempt residential driveway;
Construction of a Class I-III logging road (per RCW 76.09.050 and WAC 222);
Construction of drainage improvements in accordance with the JCC; or
Construction of a pond of one-half acre or less which is not in a regulated wetland.
Stormwater Disposal Policy Along Marine Shorelines
Pursuant to JCC 18.22.130(2) all new development activity, including single-family residential construction, located on
Marrowstone Island, Indian Island and within 500 feet of any marine shoreline is required to infiltrate stormwater
runoff onsite, to the maximum extent practicable. This provision is intended to prevent seawater from intruding into
underground aquifers, reduce non-point source pollution to marine waters, and reduce the potential for shoreline
erosion due to tightline failure. This provision is interpreted as establishing a hierarchy in which the first and best
alternative is on-site infiltration using drywells or other methods, the second best alternative is upland off-site disposal,
and the least preferred alternative is direct discharge into marine waters through a stormwater tightline. In order to
utilize the least preferred alternative, a stormwater tightline discharging directly into marine waters, applicants must
demonstrate through a geotechnical or similar report prepared by a licensed professional that both on-site infiltration
and upland off-site disposal are not practicable or feasible. The report must include cost figures for comparison.
G:\PermitCenter\###FORMS###\DRD\Stormwater\stormwater mgmt permit_FINAL.doc REV. 10/20/2014 Page 2
Please note that if a stormwater runoff tightline that terminates at or near the marine shoreline is allowed to be
included in a development application, review under the Jefferson County Shoreline Master Program, the State
Environmental Policy Act (SEPA) and other agency approvals (such as Hydraulic Project Approval from the Department of
Fish and Wildlife) may be required as well. A Joint Aquatic Resources Permit Application (JARPA) form would need to
accompany any permit application which includes a stormwater tightline at or below the ordinary high water mark.
Criteria
Prior to issuance of a stormwater management permit, the applicant shall submit a Master Land Use Application (MLA)
and the required stormwater management plans to the Administrator for review and approval. The development
definitions, criteria and thresholds for determining stormwater management plan requirements from the adopted
Stormwater Management Manual (SMM) are found in 18.30.070 of the JCC. This includes minimum requirements and
thresholds for developing a:
Small Parcel Erosion and Sediment Control Plan;
Large Parcel Erosion and Sediment Control Plan;
Permanent Stormwater Quality Control Plan (PSQC)
Process
The Administrator of the Department of Community Development will issue the stormwater management permit
consistent with a Type I (administrative) permit process only upon a finding that the proposed use or activity meets all
applicable requirements of 18.30.060 and 18.30.070, and any other applicable requirements of the JCC.
Project must submit
Worksheet A1, A2, B1, and
B2 or equivalent. Large
projects refer to
Worksheet L for
engineering requirements.
Project must submit
Worksheet A1, A2,
B1 and B2 or
equivalent.
Project must follow Construction Pollution Prevention Fact Sheet
Project must submit Worksheet A1, A2, B1,
and B2 or equivalent. Large projects refer to
Worksheet L for engineering requirements.
Worksheet L
Large Projects
Large Projects subject to Minimum Requirements #1
-9 must complete Worksheet A1 as applicable. Also
complete Worksheet B1.
No Further action needed.
Demonstrate full dispersion
on site plan.
Is the project on a parcel 5 acres or larger?
Yes
The proponent must submit
a stormwater report and site
plan prepared by a licensed
engineer that complies with
the 2012 Department of
Ecology Stormwater Man-
agement Manual for West-
ern Washington as amended
in 2014.
The report prepared by the
engineer must demonstrate
compliance with the LID
Performance Standard and
all minimum requirements.
no
For each surface consider
the BMPs in the order listed
in List #1 page 5 in
Worksheet A1, except,
raingardens may not be
used. This process is equiva-
lent to List #2 in the 2012
Department of Ecology
Stormwater Management
Manual for Western
Washington as amended in
2014.
Is the project in the Urban
Growth Area?
Yes
no
Does the project meet feasibility criteria
for full dispersion (see Worksheet C1)?
Yes
no
Yes no
Does the project discharge to a sub basin draining to salt water,
Dosewallips River, or Hoh River?
Use List #3 on Worksheet A1 page 6.
No further action is needed.
Worksheet A1
Medium & Large Project Report
Submit a site plan demonstrating the project. Refer to REFERENCE A1A for examples of Best Management
Practices (BMP’s) that you can use. Remember that all site plans submitted for the project must be consistent
and accurate.
page 1 of 6
Minimum Requirement # 1 : Preparation of Stormwater Site Plan
Describe both existing and proposed site conditions for the following items as applicable in the space below each
bullet point. Attach additional pages if needed. • structures
•
• roads
•
• utility locations•
• wellhead locations
•
• septic drainfield locations and type
• • stormwater run-on from neighboring properties
•
• expected excavation depths and volumes
•
• expected work to be done in Right-of-Way (ROW)
Complete the following:
Minimum Requirement # 2 : Construction Stormwater Pollution Prevention Plan (SWPPP)
A SWPPP is designed to be a stand-alone document that addresses construction stormwater management concerns. This
document is required to be kept by the contractor performing the work at the jobsite for reference and update during
the life of the project. Construction BMP’s must be indicated on the stormwater site plan. REFERENCE B1A includes
diagrams of common BMP’s that may be used on the site plan.
My completed SWPPP (WORKSHEET B1 or equivalent) is included in this application packet!
Minimum Requirement # 3 : Source Control of Pollution (not construction related)
The intent of source control is to prevent stormwater from coming in contact with pollutants. Source control BMPs
can be operational or structural in nature. A roof over a material storage area is an example of a structural source
control BMP. Washing your vehicle on the lawn rather than in the street is an operational BMP. This requirement
is generally not applicable to Single Family Residences (SFRs); however, ways to minimize pollution from moving
downstream should be considered during the design phase of every project. Specifications on standard source control
BMPs that are applicable to various commercial and industrial-type facilities can be found in Volume IV of the 2014
Stormwater Management Manual for Western Washington (SWMMWW) (continued on page 2).
Worksheet A1
Medium & Large Project Report
page 2 of 6
Check one of the following boxes that best represents your project with regards to MR #3.
Minimum Requirement # 3 : Source Control of Pollution (continued from page 1)
My project is a Single Family Residence (SFR) and after considering operational and structural measures to prevent
stormwater from coming in contact with pollutants, I have:
determined this MR to not be applicable. made appropriate adjustments to my project.
My project is not a SFR and after reviewing Vol. IV of the SWMMWW, I have determined that this MR is not applicable because of the following reason:
My project is not a SFR and after reviewing Vol. IV of the SWMMWW, I have determined that the following source control BMPs are applicable to my project and shall be incorporated into the project design and operation.
Worksheet A1
Medium & Large Project Report
Minimum Requirement # 4 : Preservation of Natural Drainage Systems
Creating new drainage patterns results in more site disturbance and more potential for erosion and sedimentation during
and after construction. to the maximum extent possible, proponents must 1) maintain the natural on-site drainage
pattern and concentrated discharge location at the downstream property boundary, and 2) prevent erosion at and
downstream of the discharge location.
NOTE: All outfalls require energy dissipation. See Table 4.5.1 in Vol. V of the SWMMWW for minimum design standards
for rock protection at outfalls.
Choose the option below that best describes your project:
page 3 of 6
The project site does not currently have any intermittent, seasonal, or continuous concentrated water
moving across any part of the property and the proposed improvements to the site will not create new
concentrated flow paths or not discharging to existing drainage systems.
The project site has existing concentrated flow drainage systems and outfalls. (NOTE: These items must be graphically shown on the Site Plan or equivalent, to include: type, slope, dimensions, channel lining,
direction of flow, buffer, etc.) Select below how it will be addressed.
This project will not alter the existing drainage system in any way. If the existing outfall(s) show
signs of erosion and scour, energy dissipation measures will be installed or improved upon.
Construction activity of any kind will not occur within at least 10 ft. of the edge of the channelized flow. BMP C102: BUFFER ZONES will be implemented during the life of the project to include visible
flagging or other demarcation technique.
The existing concentrated drainage system traversing the property will be impacted as part
of this project, as described in the space below and shown on the site plans. Engineering
calculations are required that show the altered drainage design can accommodate the existing flows and the added runoff contributed by the project.
Worksheet A1
Medium & Large Project Report
page 4 of 6
My project is a large project. Refer to Worksheet L. If full dispersion isn’t feasible, use LIST #1
(List #2 and List #1 are the same except raingardens are not permitted in List #2).
Minimum Requirement # 5 : On-site Stormwater Management
On-site stormwater management techniques shall be implemented where possible to accommodate the permanently
added stormwater runoff being generated by development. Some on-site stormwater management techniques provide
better stormwater detention and treatment than others; however, they are not always appropriate for use due to varying
individual site characteristics. Therefore, techniques are presented to applicants on the next pages in a hierarchical order
and shall be considered for use in the order listed. The first technique on the list that is determined to be possible shall
be implemented. See WORKSHEET C to determine which techniques are feasible.
Runoff from developments occurring in drainage basins that drain directly or indirectly to a creek require a higher level
of stormwater management, thus, the techniques are presented in three lists below:
All properties will be in one of these three categories:
My project is located in a drainage subbasin that
drains to directly or indirectly to freshwater.
PROCEED to Page 5 to use LIST #1.
My Project will discharge to a subasin draining to
salt water, Dosewallips River, or Hoh River.
PROCEED to Page 6 to use LIST #3.
Worksheet A1
Medium & Large Project Report
My project does not have disturbed soils not covered by impervious surfaces.
1. Post-Construction Soil Quality and Depth
Disturbed soils shall be amended (BMP T5.13: ).
My project does not have Roof areas.
1. Full Dispersion (BMP T5.30)
OR Downspout Full Infiltration (BMP T5.10A) 2. Rain Garden (LARGE PROJECTS CANNOT USE)
(BMP T5.14A)
3. Downspout Dispersion System (BMP T5.10B)
4. Perforated Stub-Out Connection (BMP T5.10)
5. Each BMP above is infeasible, see WORKSHEET C. STOP.
COMPLETE AND SUBMIT WORKSHEET B1. NO OTHER
INFORMATION REQUIRED AT THIS TIME.
My project does not have Other Hard Surface areas
1. Full dispersion (BMP T5.30)
2. Permeable Pavement (BMP T5.15) OR Rain Garden (LARGE PROJECTS CANNOT USE) (BMP T5.14A)
Minimum Requirement # 5 : On-site Stormwater Management (continued)
LIST # 1 : Applicable to projects that directly or indirectly drain to freshwater.
INSTRUCTIONS: Check the first option that will work for Each Category Below:
For each category below, proceed through the LIST from top down. Use WORKSHEET C to determine if the BMP
can be used. If number 1 on the list is not possible, document why on WORKSHEET C and move down to number 2, and so on.
Category A: Lawn and Landscape Areas
Category B: Roofs
Category C: Other Hard Surfaces, e.g. gravel and paved
driveways, solid decks and patios without infiltration below
3. Sheet Flow Dispersion (BMP T5.12) OR Concentrated Flow Dispersion (BMP T5.11)4. Each item above is infeasible, see WORKSHEET C. STOP.
COMPLETE AND SUBMIT WORKSHEET B1. NO OTHER
INFORMATION REQUIRED AT THIS TIME.
Worksheet A1
Medium & Large Project Report
Minimum Requirement # 5 : On-site Stormwater Management (continued)
LIST # 3 : Applicable to project that discharges to a subbasin draining to saltwater, the Dosewallips River, or the Hoh
River.
My project does not have disturbed soils not covered by impervious surfaces.
1. Post-Construction Soil Quality and Depth
Disturbed soils shall be amended (BMP T5.13: ).
My project does not have Roof areas.
1. Downspout Full Infiltration (BMP T5.10A)
*Optional - may elect to install BMP T5.14A Rain Garden*
2. BMP T5.10B: Downspout Dispersion System
3. BMP T5.10C: Perforated Stub-Out Connection
4. Each BMP above is infeasible, see WORKSHEET C.
My project does not have Other Hard Surface areas
*Optional - may elect to install BMP T5.15: Permeable Pavement OR BMP T5.14A:
Rain Garden*
1. BMP T5.12: Sheet Flow Dispersion
2. BMP T5.11: Concentrated Flow Dispersion
3. Each item above is infeasible, see WORKSHEET C. STOP. COMPLETE AND SUBMIT
WORKSHEET B1. NO OTHER INFORMATION REQUIRED AT THIS TIME.
page 6 of 6
INSTRUCTIONS: For each category, choose one option. Use Worksheet C to determine if the BMP can be used on the
site.
Category A: Lawn and Landscape Areas
Category B: Roofs
Category C: Other Hard Surfaces
Worksheet B1
Construction Protection: Medium and Large Projects(SWPPP: Stormwater Pollution Prevention Plan)
Submit a site plan demonstrating the construction protective measures or best management practices that will be used for the project during the construction phase.
Refer to REFERENCE B1A for examples of Construction Best Management Practices (BMP’s) that you can use. The
activities that take place during construction are the highest risk for stormwater problems such as erosion and
sediment control (you may need to provide an additional site plan with greater detail for stormwater features. If so, make sure it is consistent with the primary site plan. Remember that all site plans submitted for the project must
be consistent and accurate).
page 1 of 6
Element 1: Preserve Vegetation / Mark Clearing Limits
The goal of this element is to preserve native vegetation and to clearly show the limits of disturbance.
Choose any of the following that apply:
The site was cleared as part of clearing activity that is subject to an enforcement action and will be re-vegetated.
Restoration may be necessary to comply with Critical Area Regulations or stormwater requirements. Buffer Zones-
BMP C102 may apply if Critical Areas exist on-site and buffer zones shall be protected.
The perimeter of the area to be cleared shall be marked prior to clearing operation with visible flagging, orange plastic barrier fencing and/or orange silt fencing as shown on the SWPPP site plan. Vehicles will only be allowed
in the areas to be graded, so no compaction of the undeveloped areas will occur. If this option is selected check
the BMPS you will use below:
C101 Preserving Natural
Vegetation
C102 Buffer
Zones
C103 High Visibility
Fence
It is necessary to disturb the entire property during this project due to existing site conditions, property
constraints, and proposed design. I understand that all disturbed land not covered by hard surface at the end of
the project is subject to soil amendment requirements per BMP T5.13 Post-Construction Soil Quality and Depth.
Element 2: Construction Access
The goal of this element is to provide a stabilized construction entrance/exit to prevent or reduce or sediment track out.
Choose one of the following:
The driveway to the construction area already exists and will be used for construction access. All equipment and
vehicles will be restricted to staying on that existing impervious surface. If sediment is tracked off site, the road-
way will be cleaned thoroughly at the end of each day.
A stabilized construction entrance will be installed prior to any vehicles entering the site, at the location
shown on the SWPPP site plan. If sediment is tracked off site, the roadway will be cleaned thoroughly at the end of each day. If this option is selected check the BMPS you will use below:
C105 Stabilized
Construction Entrance /
Exit
C106 Wheel
Wash
C107 Construction
Road / Parking Area
Stabilization
Worksheet B1
Construction Protection: Medium and Large Projects(SWPPP: Stormwater Pollution Prevention Plan)
Element 3: Control Flow Rates
The goal of this element is to construct retention or detention facilities when necessary to protect properties and waterways downstream of development sites from erosion and turbid discharges.
This element does not apply to my project because (check any that apply):
page 2 of 6
Site is mildly sloped (<5%),
There are no individually sloped sections greater than 10%,
The bulk of the project is scheduled to occur during dry season (May 1-Sept 30)
Sediment control BMPs shall be placed at the locations shown on the SWPPP Site Plan. If this option is selected
check the BMPS you will use below:
C233 Silt FenceC231 Brush Barrier
C234 Vegetated
Strip
C232 Gravel Filter
Berm
C235 Wattles
Element 4: Sediment Control
The goal of this element is to construct sediment control BMPs that minimize sediment discharges from the site.
Select one of the two statements applicable to the project.
The site has already been stabilized and re-vegetated.
Element 5: Stabilize Soils
• Soil stockpiles will be located within the disturbed area shown on the SWPPP Site Plan.
• Soil excavated for the foundation will be backfilled against the foundation and graded to drain away from the building. • No soils shall remain exposed and unworked for more than 7 days from May 1 to September 30 or more than
2 days from October 1 to April 30. • Once the disturbed landscape areas are graded, the grass areas will be amended.
• All stockpiles will be covered with plastic or burlap if left unworked.
The goal of this element is to stabilize exposed and unworked soils by implementing erosion control BMPs.
Select one of the three statements applicable to the project.
My project will ensure the following:
This element does not apply to my project because:
My project must implement specific BMP’s to ensure compliance. (Check BMP’s you will use on the next page).
Worksheet B1
Construction Protection: Medium and Large Projects(SWPPP: Stormwater Pollution Prevention Plan)
page 3 of 6
C120 Temporary &
Permanent Seeding
C123 Plastic CoveringC121 Mulching
C124 SoddingC122 Nets & Blankets
C125 Topsoil /
Composting
C131 Gradient
Terraces
C140 Dust Control
C235 Wattles
Element 6: Protect Slopes
The goal of this element is to design and construct cut-and-fill slopes in a manner to minimize erosion.
Select one of the two statements applicable to the project.
No cut slopes over 4 feet high or slopes steeper than 2 feet horizontal to 1 foot vertical, and no fill slopes over
4 feet high will exceed 3 feet horizontal to 1 foot vertical. Therefore, there is no requirement for additional
engineered slope protection.
The above checkbox is not checked. My submittal is designed by a licensed geologist to protect slopes. Based on
the licensed professionals recommendation (please attach their evaluation), the following BMP’s will be used:
C120 Temporary & Permanent
Seeding
C204 Pipe Slope Drains
C205 Subsurface
Drains
C206 Level Spreader
C207 Check Dams
C208 Triangular Silt Dike
(Geotextile-Encased Check Dam)
Catch basins on the site or immediately off site in the right-of-way are shown on the SWPPP Site Plan. Storm drain
inlet protection shall be installed. If this option is selected check the BMPS you will use below:
C220 Storm Drain Inlet Protection
The site has open ditches in the right-of-way or private road right-of-way.
There are no catch basins on or near the site.
Element 7: Protect Permanent Drain Inlets
The goal of this element is to protect storm drain inlets during construction to prevent stormwater runoff from entering the conveyance system without being filtered or treated.
Select one of the three statements applicable to the project.
Worksheet B1
Construction Protection: Medium and Large Projects(SWPPP: Stormwater Pollution Prevention Plan)
A wattle shall be placed at the end of the swale to prevent erosion at the outlet of the swale. If this option is
selected check the BMPS you will use below:
C202 Channel Lining C207 Check Dams C235 WattlesC209 Outlet Protection
page 4 of 6
Element 8: Stabilize Channels and Outlets
The goal of this element is to design, construct, and stabilize on-site conveyance channels to prevent erosion from entering existing stormwater outfalls and conveyance systems.
Select one of the three statements applicable to the project.
Construction will occur during the dry weather. No storm drainage channels or ditches shall be constructed either
temporary or permanent.
There are no existing or proposed stormwater conveyance channels on the project site.
C151 Concrete Handling C152 Sawcutting and Surfacing
Pollution Prevention
C153 Material Delivery, Storage, and Containment C154 Concrete Washout Area
If one or more of the checkboxes above are unchecked. Any and all pollutants, chemicals, liquid products and other
materials that have the potential to pose a threat to human health or the environment will be covered, contained, and
protected from vandalism. All such products shall be kept under cover in a secure location on-site. Concrete handling
shall follow BMP C151 C154. If this option is selected check the BMPS you will use below:
Element 9: Control Pollutants
This element does not apply to my project because (circle any that apply - If any box is unchecked this element applies.
The goal of this element is to design, install, implement and maintain BMPs to minimize the discharge of pollutants from material storage areas, fuel handling, equipment cleaning, management of waste materials, etc.
There will be no concrete work,
There will be no sawcutting work,
There will be no hazardous materials on-site,
There will be no fertilizer or pesticide application,
There will be no heavy equipment associated with this project,
There will be no pressure washing, equipment maintenance or dewatering
Worksheet B1
Construction Protection: Medium and Large Projects(SWPPP: Stormwater Pollution Prevention Plan)
C203 Water Bars C236 Vegetated Filtration C206 Level Spreader
Element 10: Control De-watering
No dewatering of the site is anticipated.
Dewatering of the site is anticipated. If this option is selected check the BMPS you will use below:
page 5 of 6
Select one of the two statements applicable to the project.
The goal of this element is to handle turbid or contaminated water from dewatering (removal of water)
separately from stormwater.
Describe the steps you will take:
Element 12: Manage the Project
The SWPPP will be implemented at all times. If applicable to the project, erosion control BMPs will be implemented in the following sequence:
1. Mark clearing limits
2. Install stabilized construction entrance
3. Install protection for existing drainage systems and permanent drain inlets
4. Establish staging areas for storage and handling polluted material and BMPs
5. Install sediment control BMPs
6. Grade and install stabilization measures for disturbed areas
7. Maintain BMPs until site stabilization, at which time they may be removed
Element 11: Maintain Best Management Practices
Best Management Practices or BMPs shall be inspected and maintained during construction and removed within
30 days after the County Inspector or determines that the site is stabilized, provided that they may be removed when they are no longer needed.
The goal of this element is to maintain and repair all temporary and permanent erosion and sediment control BMPs to assure continued performance.
The goal of this element is to ensure that the owner and those performing the site work comply with the SWPPP and properly coordinate to ensure that all BMPs are deployed at the proper time to achieve full compliance with county regulations throughout the project.
ADU/Garage – 1070 Chimacum Road, Stormwater Control Plan, Page 2 of 3
INTRODUCTION
This Stormwater Control Plan has been prepared as part of the Jefferson County (County)
stormwater requirements for “Large” construction projects which add 5,000 square feet or more of
new impervious surface, convert ¾ acres of pervious surfaces to lawn or landscaped areas or
convert 2 ½ acres of forested area to pasture. The intent of this report is to comprehensively
describe the stormwater management system for a proposed ADU/Garage. This report will
provide information on existing conditions of the site, proposed construction, and method of
stormwater mitigation.
EXISTING CONDITIONS
The site is a 5.03 acre parcel (901-113-004) located on the west side of Chimacum Road in
Jefferson County. The parcel has been previously developed and contains a single family
residence and several outbuildings. Utilities onsite consist of an onsite septic system, existing
well (not in use), and power and water utilities from Jefferson County PUD facilities in Chimacum
Road. The site is accessed from a gravel driveway off of Chimacum Road. The vegetation
onsite is primarily a mix of forested areas and grassy areas. The central portion of the site is the
highest point of the site and the western half of the site slopes down to the west and the eastern
half slopes down toward the east. The eastern portion of the site is gently sloped (2-5%) while
the western portion has some steeper slopes (up to 20%). The eastern portion of the site is 3-4
feet lower than Chimacum Road and has a slight slope to the north. However a berm is located
in the northeast corner of the site (location of old driveway) which does not allow runoff to leave
the site at that location.
Per Jefferson County GIS data, wetlands are located on the western third of the property and
along the eastern property line adjacent to Chimacum Road. The noted wetland along
Chimacum Road has been investigated by Kim Meehan of Meehan Biological Assessments and
they determined that no wetland is present at that location.
Again per Jefferson County Mapping, a seismic hazard area is located along the eastern property
line adjacent to Chimacum Road. This area has been investigated by Zenovic & Associates Inc.
and it was determined that there is no additional seismic risk present at this location due to the
density of the silty clay in the noted area.
Per the NRCS soils survey, the soils onsite are classified as San Juan gravelly sandy loam and
Wapato silty clay loam. Based on the review of the soil logs prepared by the septic system
designer and further confirmed by this office, the soils appear to be consistent with the noted soil
types although the area of Wapato silty clay loam somewhat more limited than shown in the soil
maps. See the geotechnical report for this project for additional information.
PROJECT REQUIREMENTS
Because this project adds more than 5,000 square feet of impervious surfaces, it qualifies as a
“Large” project and is required to meet Minimum Requirements #1-9 of the Stormwater
Management Manual for Western Washington (DOE, 2014) hereafter referred to as the Manual.
Additionally, per Jefferson County Worksheet L, this project must demonstrate compliance with
the LID Performance Standard.
Minimum requirements 1-4 are addressed in Worksheet A-1 and B-1 which are included with this
submittal. Minimum requirements 5-9 are addressed below.
ADU/Garage – 1070 Chimacum Road, Stormwater Control Plan, Page 3 of 3
REQUIREMENT #5: ONSITE STORMWATER MANAGEMENT
As noted above, this project is required to demonstrate compliance with the LID performance
Standard. The LID performance standard is stated as follows:
Stormwater discharges shall match developed discharge durations to pre-developed
durations for the range of pre-developed discharge rates from 8% of the 2-year peak flow to
50% of the 2-year peak flow.
Predeveloped conditions for the modified areas must be modeled as a forested condition. To
meet this requirement, runoff from the proposed roof will be routed to a shallow drywell/infiltration
trench located in the San Juan gravelly sands to the southwest of the proposed structure. Runoff
from the driveway will be dispersed into existing vegetation directly adjacent to the proposed
driveway. Simply dispersing runoff from driveway will not be sufficient to comply with the LID
Performance Standard. However, the presence of the low area adjacent to Chimacum Road with
no apparent outlet allows for a large shallow area which can provide ponding and infiltration of
stormwater runoff.
Stormwater facilities were modeled in WWHM2012 per the most recent guidance by the
Department of Ecology to demonstrate compliance with the LID performance Standard and these
calculations are included in Appendix B of this report.
Please note the model shows that the model does not meet the Flow Control Performance
Standard (Minimum Requirement #7) and this will be discussed later. It should be noted that the
low area utilized for infiltration above was limited to 6 inches of ponding for modeling purposes to
demonstrate compliance with the LID Performance Standard. There is much more ponding depth
available at that location before any runoff leaves the site as surface flow and it is anticipated that
this site would easily meet the Flow Control Performance Standard.
REQUIREMENT #6: RUNOFF TREATMENT
Runoff treatment is not required for this project as it includes installation of less than 5,000 s.f. of
pollution generating hard surfaces. While the project is not required to meet this requirement,
dispersion of the driveway runoff through adjacent vegetation will provide treatment of that runoff.
REQUIREMENT #7: FLOW CONTROL
This project does not requires flow control facilities as the project adds less than 10,000 square
feet of new hard surfaces.
REQUIREMENT #8: WETLANDS PROTECTION
As noted above in the existing conditions, it has been determined that there is no wetland present
in the eastern portion of the site where the development is to occur and will drain to. As such this
requirement is not applicable to this project.
REQUIREMENT #9: OPERATION AND MAINTENANCE
Operation and Maintenance Manuals are typically required only for those projects which include
stormwater detention and/or treatment facilities required to meet Minimum Requirements #6
(Runoff Treatment) and #7 (Flow Control). As there are no such facilities associated with this
project no Operation and Maintenance Manual was provided.
APPENDIX A
PROJECT PLANS
995.99'S87°35'02"E923.36'S87°35'02"E252.43'
S18°25'
2
3
"
E
5' SETBACK
5'
SETBACK
PPLEGEND:... PROPERTY BOUNDARY... PROPERTY SETBACK... BUILDING FOOTPRINT... BUILDING ROOF EDGE... EDGE OF ROADWAY... STORM LINE... UNDERGROUND POWER LINE... SEPTIC SYSTEM... PROPOSE WATER SERVICE LINE... EX. GRAVEL DRIVEWAY...NEW GRAVEL DRIVEWAY... EX. ROADWAY... SHEET FLOW DIRECTION... CATCH BASINDRAINAGE NOTES:1. ALL CONSTRUCTION SHALL CONFORM WITH THESE PLANS AND THE WASHINGTON STATE DEPARTMENT OF TRANSPORTATION STANDARD PLANS FOR ROAD,BRIDGE AND MUNICIPAL CONSTRUCTION.2. CONTRACTOR SHALL NOTIFY UTILITY LOCATOR SERVICE AND ARRANGE FOR FIELD LOCATION AND MARKING OF ALL UNDERGROUND UTILITIES IN AFFECTEDAREAS PRIOR TO CONSTRUCTION.3. ALL STORM DRAIN PIPING SHALL BE PVC. PVC PIPING IN TRAFFIC AREAS TO BE SDR35 PIPE CONFORMING WITH ASTM SPECIFICATION D3034.4. FINAL ELEVATIONS, GRADES, AND ACTUAL PIPE LOCATIONS ARE TO BE DETERMINED BY OTHERS SUCH THAT THE FINAL ELEVATIONS AND DRAINAGEPATTERNS CONFORM WITH THE PLAN AND DETAILS HEREON. ANY CHANGES MUST BE APPROVED BY THE ENGINEER PRIOR TO CONSTRUCTION.5. THIS DRAINAGE SYSTEM MUST BE INSPECTED AND CERTIFIED TO THE COUNTY BY THE ENGINEER. CONTACT ZENOVIC & ASSOCIATES, INC. AT LEAST 48HOURS PRIOR TO TIME OF INSPECTION.EROSION CONTROL NOTES:1. ALL EROSION CONTROL MEASURES SHALL BE CONSTRUCTED AND MAINTAINED IN ACCORDANCE WITH THE REQUIREMENTS OF THE MOST CURRENT EDITION OF THESTORMWATER MANAGEMENT MANUAL FOR WESTERN WASHINGTON.2. ALL DISTURBED AREAS, EXCEPT THOSE ON WHICH ACTIVE CONSTRUCTION IS TAKING PLACE, SHALL BE EITHER SEEDED AND MULCHED OR PROTECTED WITHAPPROPRIATE PLASTIC SHEETING WITHIN 2 DAYS OF DISTURBANCE BETWEEN OCTOBER 1 AND APRIL 30 AND WITHIN 7 DAYS BETWEEN MAY 1 AND SEPTEMBER 30.3. EXISTING DRIVEWAY TO BE UTILIZED AS STABILIZED ACCESS TO THE SITE, AND PROPOSED DRIVEWAY WILL BE INSTALLED PRIOR TO OTHER LAND-DISTURBINGACTIVITIES TO PROVIDE FURTHER STABILIZED ACCESS TO THE SITE.4. ALL EROSION CONTROL MEASURES SHALL BE INSPECTED MONTHLY AND AFTER MAJOR STORM EVENTS. ANY DEFICIENCIES SHALL BE REPAIRED IMMEDIATELY.5. ANY MUD THAT IS CARRIED OFFSITE BY VEHICLE WHEELS AND DEPOSITED ON PUBLIC ROADWAYS SHALL BE CLEANED UP IMMEDIATELY.6. ADJACENT PROPERTIES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION BY APPROPRIATE USE OF VEGETATIVE BUFFER STRIPS, SEDIMENT BARRIERS ORFILTERS, DIKES OR MULCHING, OR BY A COMBINATION OF THESE MEASURES.100% RESERVE AREA
PROPOSED NEWADU/GARAGE APPROX.5317 S.F.WR100' WELL RADIUSEX. SFRAPPROX.1300 S.F.100% RESERVE AREA
HADLO
C
K
-
C
H
I
M
A
C
U
M
R
O
A
DEX WELL HOUSE APPROX. 80 S.F. POWER LINE( BY OTHERS)EX. POWER LINEWATER LINE(BY OTHERS)NEW WATER METEREX. WATER METERPROPOSED SEPTICSYSTEM (BY OTHERS)SEPTIC TANK AND PUMP CHAMBER (BY OTHERS)EX. WELL HEADEX. POWER METERNEW POWER METEREX. WATER LINEEX. AGRICULTURAL BUILDING.(APPROX 2,160 S.F.)EX. SHED (APPROX 400 S.F.)EX. SEPTIC SYSTEM(SEP1995-352)PROPOSED GRAVELDRIVEWAY, APPROX3,050 S.F.TP-5TP-4XAREA TO BE UTILIZED TODISPERSE AND INFILTRATERUNOFF FROM DRIVEWAYINTO EXISTING VEGETATIONEXISTING GATEAPPROXIMATE EDGE OFUNUSED DRVEWAY/BERMINSTALL 55 L.F. INFILTRATIONTRENCH PER DETAIL A/2TP-1TP-2TP-3INSTALLSEDIMENTTRAP PERDETAIL B/220' SETBACK30'EX. DRIVEWAY (APPROX 9,200 S.F.)EMAIL: ZENOVIC@ZENOVIC.NETSHEETTITLE:
CLIENT:OFFILE:JOB NO:SCALE:DATE:SITE PLAN
21PORT ANGELES, WA 98362
301 EAST 6TH ST. SUITE 1
FAX: (360) 417-0514
PHONE: (360) 417-0501Z
INCORPORATED
ENOVIC &
ASSOCIATES0Scale: 1" = 60'60'120'180'1"=60'7/11/202222262-C122262ROBER AND JANNETTE HAGEN
1070 CHIMACUM ROAD
PORT HADLOCK, WA 98339
ADU/GARAGE FOR HAGEN, 1070 CHIMICUM ROAD, PORT HADLOCK, JEFFERSON COUNTY PARCEL# 901-113-004
S
E
THJRODMNPROFESSIONALENGIN
EER
STAT
E
OFWASHINGTONREGISTERED53777A.
4"Ø PVC TIGHTLINE FROMDOWNSPOUTS; 2% MIN. SLOPETRAFFIC RATED FRAME ANDGRATE IN ROADWAY AREAS4"Ø OUTLET TO INFILTRATION TRENCHTYPE 50 AREA DRAINOR APPROVED EQUAL4" OUTLET TEE; PROVIDE 1/4"GALV. SCREEN ON BOTTOMFINISHEDGRADEFROM CATCH BASIN12" MIN.36" MIN.36"4"ØPERFORATEDPIPE112"- 34" WASHEDROCKFILTER FABRIC;EXTEND 6" MIN.BEYOND EDGE OFTRENCHTOP SOILPER PLAN112"- 34" WASHEDROCKFILTERFABRIC4"Ø PERFORATED PIPE4"Ø PVCPIPENOTE:TOP OF TRENCH SHALL BE SITUATED LOWER THAN BOTTOM OF FOOTING OFPROPOSED RESIDENCEEMAIL: ZENOVIC@ZENOVIC.NETSHEETTITLE:
CLIENT:OFFILE:JOB NO:SCALE:DATE:DETAILS
22PORT ANGELES, WA 98362
301 EAST 6TH ST. SUITE 1
FAX: (360) 417-0514
PHONE: (360) 417-0501Z
INCORPORATED
ENOVIC &
ASSOCIATESN TS7/11/202222262-C122262ROBER AND JANNETTE HAGEN
1070 CHIMACUM ROAD
PORT HADLOCK, WA 98339
ADU/GARAGE FOR HAGEN, 1070 CHIMICUM ROAD, PORT HADLOCK, JEFFERSON COUNTY PARCEL# 901-113-004
S
E
THJRODMNPROFESSIONALENGIN
EER
STAT
E
OFWASHINGTONREGISTERED53777A.
APPENDIX B
FLOW CONTROL CALCULATIONS
WWHM2012
PROJECT REPORT
22264-MODEL 7/11/2022 8:33:58 PM Page 2
General Model Information
Project Name:22264-MODEL
Site Name:
Site Address:
City:
Report Date:7/11/2022
Gage:Port Angeles
Data Start:1948/10/01
Data End:2009/09/30
Timestep:15 Minute
Precip Scale:0.800
Version Date:2019/09/13
Version:4.2.17
POC Thresholds
Low Flow Threshold for POC1:50 Percent of the 2 Year
High Flow Threshold for POC1:50 Year
22264-MODEL 7/11/2022 8:33:58 PM Page 3
Landuse Basin Data
Predeveloped Land Use
Basin 1
Bypass:No
GroundWater:No
Pervious Land Use acre
A B, Forest, Flat 0.096
C, Forest, Flat 0.096
Pervious Total 0.192
Impervious Land Use acre
Impervious Total 0
Basin Total 0.192
Element Flows To:
Surface Interflow Groundwater
22264-MODEL 7/11/2022 8:33:58 PM Page 4
Lateral Basin 1
Bypass:No
GroundWater:No
Pervious Land Use acre
C, Pasture, Flat .25
Element Flows To:
Surface Interflow Groundwater
22264-MODEL 7/11/2022 8:33:58 PM Page 5
Mitigated Land Use
Basin 1
Bypass:No
GroundWater:No
Pervious Land Use acre
Pervious Total 0
Impervious Land Use acre
ROOF TOPS FLAT 0.122
Impervious Total 0.122
Basin Total 0.122
Element Flows To:
Surface Interflow Groundwater
Gravel Trench Bed 1 Gravel Trench Bed 1
22264-MODEL 7/11/2022 8:33:58 PM Page 6
Lateral I Basin 1
Bypass:No
Impervious Land Use acre
ROADS FLAT LAT 0.07
Element Flows To:
Outlet 1 Outlet 2
Lateral Basin 1
22264-MODEL 7/11/2022 8:33:58 PM Page 7
Lateral Basin 1
Bypass:No
GroundWater:No
Pervious Land Use acre
C, Pasture, Flat .25
Element Flows To:
Surface Interflow Groundwater
Trapezoidal Pond 1 Trapezoidal Pond 1
22264-MODEL 7/11/2022 8:33:58 PM Page 8
Routing Elements
Predeveloped Routing
22264-MODEL 7/11/2022 8:33:58 PM Page 9
Mitigated Routing
Gravel Trench Bed 1
Bottom Length:55.00 ft.
Bottom Width:3.00 ft.
Trench bottom slope 1:0.01 To 1
Trench Left side slope 0:0.01 To 1
Trench right side slope 2:0.01 To 1
Material thickness of first layer:3
Pour Space of material for first layer:0.33
Material thickness of second layer:0
Pour Space of material for second layer:0
Material thickness of third layer:0
Pour Space of material for third layer:0
Infiltration On
Infiltration rate:5
Infiltration safety factor:1
Wetted surface area On
Total Volume Infiltrated (ac-ft.):8.685
Total Volume Through Riser (ac-ft.):0.002
Total Volume Through Facility (ac-ft.):8.688
Percent Infiltrated:99.97
Total Precip Applied to Facility:0
Total Evap From Facility:0
Discharge Structure
Riser Height:3 ft.
Riser Diameter:10 in.
Element Flows To:
Outlet 1 Outlet 2
Gravel Trench Bed Hydraulic Table
Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs)
0.0000 0.003 0.000 0.000 0.000
0.0444 0.003 0.000 0.000 0.019
0.0889 0.003 0.000 0.000 0.019
0.1333 0.003 0.000 0.000 0.019
0.1778 0.003 0.000 0.000 0.019
0.2222 0.003 0.000 0.000 0.019
0.2667 0.003 0.000 0.000 0.019
0.3111 0.003 0.000 0.000 0.019
0.3556 0.003 0.000 0.000 0.019
0.4000 0.003 0.000 0.000 0.019
0.4444 0.003 0.000 0.000 0.019
0.4889 0.003 0.000 0.000 0.019
0.5333 0.003 0.000 0.000 0.019
0.5778 0.003 0.000 0.000 0.019
0.6222 0.003 0.000 0.000 0.019
0.6667 0.003 0.000 0.000 0.019
0.7111 0.003 0.000 0.000 0.019
0.7556 0.003 0.000 0.000 0.019
0.8000 0.003 0.001 0.000 0.019
0.8444 0.003 0.001 0.000 0.019
0.8889 0.003 0.001 0.000 0.019
0.9333 0.003 0.001 0.000 0.019
0.9778 0.003 0.001 0.000 0.019
22264-MODEL 7/11/2022 8:33:58 PM Page 10
1.0222 0.003 0.001 0.000 0.019
1.0667 0.003 0.001 0.000 0.019
1.1111 0.003 0.001 0.000 0.019
1.1556 0.003 0.001 0.000 0.019
1.2000 0.003 0.001 0.000 0.019
1.2444 0.003 0.001 0.000 0.019
1.2889 0.003 0.001 0.000 0.019
1.3333 0.003 0.001 0.000 0.019
1.3778 0.003 0.001 0.000 0.019
1.4222 0.003 0.001 0.000 0.019
1.4667 0.003 0.001 0.000 0.019
1.5111 0.003 0.001 0.000 0.019
1.5556 0.003 0.002 0.000 0.019
1.6000 0.003 0.002 0.000 0.019
1.6444 0.003 0.002 0.000 0.019
1.6889 0.003 0.002 0.000 0.019
1.7333 0.003 0.002 0.000 0.019
1.7778 0.003 0.002 0.000 0.019
1.8222 0.003 0.002 0.000 0.019
1.8667 0.003 0.002 0.000 0.019
1.9111 0.003 0.002 0.000 0.019
1.9556 0.003 0.002 0.000 0.019
2.0000 0.003 0.002 0.000 0.019
2.0444 0.003 0.002 0.000 0.019
2.0889 0.003 0.002 0.000 0.019
2.1333 0.003 0.002 0.000 0.019
2.1778 0.003 0.002 0.000 0.019
2.2222 0.003 0.002 0.000 0.019
2.2667 0.003 0.002 0.000 0.019
2.3111 0.003 0.002 0.000 0.019
2.3556 0.003 0.003 0.000 0.019
2.4000 0.003 0.003 0.000 0.019
2.4444 0.003 0.003 0.000 0.019
2.4889 0.003 0.003 0.000 0.019
2.5333 0.003 0.003 0.000 0.019
2.5778 0.003 0.003 0.000 0.019
2.6222 0.003 0.003 0.000 0.019
2.6667 0.003 0.003 0.000 0.019
2.7111 0.003 0.003 0.000 0.019
2.7556 0.003 0.003 0.000 0.019
2.8000 0.003 0.003 0.000 0.019
2.8444 0.003 0.003 0.000 0.019
2.8889 0.003 0.003 0.000 0.019
2.9333 0.003 0.003 0.000 0.019
2.9778 0.003 0.003 0.000 0.019
3.0222 0.003 0.003 0.029 0.019
3.0667 0.003 0.004 0.151 0.019
3.1111 0.003 0.004 0.323 0.019
3.1556 0.003 0.004 0.523 0.019
3.2000 0.003 0.004 0.733 0.019
3.2444 0.003 0.004 0.933 0.019
3.2889 0.003 0.005 1.107 0.019
3.3333 0.003 0.005 1.242 0.019
3.3778 0.003 0.005 1.337 0.019
3.4222 0.003 0.005 1.421 0.019
3.4667 0.003 0.005 1.494 0.019
3.5111 0.003 0.005 1.563 0.019
3.5556 0.003 0.006 1.630 0.019
22264-MODEL 7/11/2022 8:33:58 PM Page 11
3.6000 0.003 0.006 1.694 0.019
3.6444 0.003 0.006 1.755 0.019
3.6889 0.003 0.006 1.815 0.019
3.7333 0.003 0.006 1.873 0.019
3.7778 0.003 0.006 1.929 0.019
3.8222 0.003 0.007 1.983 0.019
3.8667 0.003 0.007 2.036 0.019
3.9111 0.003 0.007 2.087 0.019
3.9556 0.003 0.007 2.138 0.019
4.0000 0.003 0.007 2.187 0.019
22264-MODEL 7/11/2022 8:33:58 PM Page 12
Trapezoidal Pond 1
Bottom Length:100.00 ft.
Bottom Width:12.00 ft.
Depth:1 ft.
Volume at riser head:0.0157 acre-feet.
Infiltration On
Infiltration rate:0.2
Infiltration safety factor:1
Total Volume Infiltrated (ac-ft.):4.48
Total Volume Through Riser (ac-ft.):0.009
Total Volume Through Facility (ac-ft.):4.489
Percent Infiltrated:99.8
Total Precip Applied to Facility:0
Total Evap From Facility:0
Side slope 1:3 To 1
Side slope 2:3 To 1
Side slope 3:3 To 1
Side slope 4:3 To 1
Discharge Structure
Riser Height:0.5 ft.
Riser Diameter:8 in.
Element Flows To:
Outlet 1 Outlet 2
Pond Hydraulic Table
Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs)
0.0000 0.027 0.000 0.000 0.000
0.0111 0.027 0.000 0.000 0.005
0.0222 0.027 0.000 0.000 0.005
0.0333 0.028 0.000 0.000 0.005
0.0444 0.028 0.001 0.000 0.005
0.0556 0.028 0.001 0.000 0.005
0.0667 0.028 0.001 0.000 0.005
0.0778 0.028 0.002 0.000 0.005
0.0889 0.028 0.002 0.000 0.005
0.1000 0.029 0.002 0.000 0.005
0.1111 0.029 0.003 0.000 0.005
0.1222 0.029 0.003 0.000 0.005
0.1333 0.029 0.003 0.000 0.005
0.1444 0.029 0.004 0.000 0.005
0.1556 0.030 0.004 0.000 0.005
0.1667 0.030 0.004 0.000 0.005
0.1778 0.030 0.005 0.000 0.005
0.1889 0.030 0.005 0.000 0.005
0.2000 0.030 0.005 0.000 0.005
0.2111 0.030 0.006 0.000 0.005
0.2222 0.031 0.006 0.000 0.005
0.2333 0.031 0.006 0.000 0.005
0.2444 0.031 0.007 0.000 0.005
0.2556 0.031 0.007 0.000 0.005
0.2667 0.031 0.007 0.000 0.005
0.2778 0.031 0.008 0.000 0.005
0.2889 0.032 0.008 0.000 0.005
0.3000 0.032 0.009 0.000 0.005
0.3111 0.032 0.009 0.000 0.005
22264-MODEL 7/11/2022 8:33:58 PM Page 13
0.3222 0.032 0.009 0.000 0.005
0.3333 0.032 0.010 0.000 0.005
0.3444 0.033 0.010 0.000 0.005
0.3556 0.033 0.010 0.000 0.005
0.3667 0.033 0.011 0.000 0.005
0.3778 0.033 0.011 0.000 0.005
0.3889 0.033 0.011 0.000 0.005
0.4000 0.033 0.012 0.000 0.005
0.4111 0.034 0.012 0.000 0.005
0.4222 0.034 0.013 0.000 0.005
0.4333 0.034 0.013 0.000 0.005
0.4444 0.034 0.013 0.000 0.005
0.4556 0.034 0.014 0.000 0.005
0.4667 0.034 0.014 0.000 0.005
0.4778 0.035 0.015 0.000 0.005
0.4889 0.035 0.015 0.000 0.005
0.5000 0.035 0.015 0.000 0.005
0.5111 0.035 0.016 0.008 0.005
0.5222 0.035 0.016 0.023 0.005
0.5333 0.036 0.016 0.043 0.005
0.5444 0.036 0.017 0.066 0.005
0.5556 0.036 0.017 0.092 0.005
0.5667 0.036 0.018 0.121 0.005
0.5778 0.036 0.018 0.152 0.005
0.5889 0.036 0.019 0.184 0.005
0.6000 0.037 0.019 0.219 0.005
0.6111 0.037 0.019 0.255 0.005
0.6222 0.037 0.020 0.292 0.005
0.6333 0.037 0.020 0.329 0.005
0.6444 0.037 0.021 0.367 0.005
0.6556 0.038 0.021 0.404 0.005
0.6667 0.038 0.021 0.441 0.005
0.6778 0.038 0.022 0.478 0.005
0.6889 0.038 0.022 0.513 0.005
0.7000 0.038 0.023 0.547 0.005
0.7111 0.038 0.023 0.580 0.005
0.7222 0.039 0.024 0.610 0.005
0.7333 0.039 0.024 0.639 0.005
0.7444 0.039 0.024 0.665 0.005
0.7556 0.039 0.025 0.689 0.005
0.7667 0.039 0.025 0.711 0.005
0.7778 0.040 0.026 0.730 0.005
0.7889 0.040 0.026 0.747 0.005
0.8000 0.040 0.027 0.762 0.005
0.8111 0.040 0.027 0.776 0.005
0.8222 0.040 0.028 0.788 0.005
0.8333 0.041 0.028 0.799 0.005
0.8444 0.041 0.028 0.821 0.005
0.8556 0.041 0.029 0.834 0.005
0.8667 0.041 0.029 0.847 0.005
0.8778 0.041 0.030 0.860 0.005
0.8889 0.041 0.030 0.873 0.005
0.9000 0.042 0.031 0.885 0.005
0.9111 0.042 0.031 0.897 0.005
0.9222 0.042 0.032 0.909 0.005
0.9333 0.042 0.032 0.921 0.005
0.9444 0.042 0.033 0.933 0.005
0.9556 0.043 0.033 0.944 0.005
22264-MODEL 7/11/2022 8:33:58 PM Page 14
0.9667 0.043 0.034 0.956 0.005
0.9778 0.043 0.034 0.967 0.005
0.9889 0.043 0.035 0.978 0.005
1.0000 0.043 0.035 0.989 0.005
1.0111 0.044 0.036 1.000 0.005
22264-MODEL 7/11/2022 8:33:58 PM Page 15
Analysis Results
POC 1
+ Predeveloped x Mitigated
Predeveloped Landuse Totals for POC #1
Total Pervious Area:0.442
Total Impervious Area:0
Mitigated Landuse Totals for POC #1
Total Pervious Area:0.25
Total Impervious Area:0.192
Flow Frequency Method:Log Pearson Type III 17B
Flow Frequency Return Periods for Predeveloped. POC #1
Return Period Flow(cfs)
2 year 0.002569
5 year 0.005827
10 year 0.008357
25 year 0.011707
50 year 0.0142
100 year 0.01663
Flow Frequency Return Periods for Mitigated. POC #1
Return Period Flow(cfs)
2 year 0
5 year 0
10 year 0
25 year 0
50 year 0
100 year 0
Annual Peaks
22264-MODEL 7/11/2022 8:35:37 PM Page 16
Annual Peaks for Predeveloped and Mitigated. POC #1
Year Predeveloped Mitigated
1949 0.002 0.000
1950 0.003 0.000
1951 0.003 0.000
1952 0.001 0.000
1953 0.001 0.000
1954 0.008 0.000
1955 0.007 0.000
1956 0.003 0.000
1957 0.004 0.000
1958 0.001 0.000
1959 0.004 0.000
1960 0.006 0.000
1961 0.008 0.000
1962 0.001 0.000
1963 0.002 0.000
1964 0.002 0.000
1965 0.001 0.000
1966 0.001 0.000
1967 0.007 0.000
1968 0.002 0.000
1969 0.000 0.000
1970 0.001 0.000
1971 0.010 0.000
1972 0.008 0.000
1973 0.002 0.000
1974 0.001 0.000
1975 0.002 0.000
1976 0.002 0.000
1977 0.000 0.000
1978 0.000 0.000
1979 0.000 0.024
1980 0.005 0.000
1981 0.003 0.000
1982 0.005 0.000
1983 0.005 0.000
1984 0.002 0.000
1985 0.006 0.000
1986 0.011 0.004
1987 0.005 0.000
1988 0.002 0.000
1989 0.002 0.000
1990 0.003 0.000
1991 0.006 0.000
1992 0.006 0.000
1993 0.001 0.000
1994 0.000 0.000
1995 0.001 0.000
1996 0.003 0.000
1997 0.005 0.000
1998 0.000 0.000
1999 0.012 0.005
2000 0.004 0.000
2001 0.001 0.000
2002 0.005 0.000
2003 0.004 0.000
2004 0.006 0.000
22264-MODEL 7/11/2022 8:35:37 PM Page 17
2005 0.003 0.000
2006 0.006 0.000
2007 0.007 0.000
2008 0.001 0.000
2009 0.002 0.000
Ranked Annual Peaks
Ranked Annual Peaks for Predeveloped and Mitigated. POC #1
Rank Predeveloped Mitigated
1 0.0117 0.0236
2 0.0114 0.0049
3 0.0096 0.0044
4 0.0077 0.0000
5 0.0077 0.0000
6 0.0076 0.0000
7 0.0071 0.0000
8 0.0069 0.0000
9 0.0068 0.0000
10 0.0064 0.0000
11 0.0062 0.0000
12 0.0060 0.0000
13 0.0060 0.0000
14 0.0060 0.0000
15 0.0058 0.0000
16 0.0055 0.0000
17 0.0054 0.0000
18 0.0054 0.0000
19 0.0053 0.0000
20 0.0049 0.0000
21 0.0046 0.0000
22 0.0042 0.0000
23 0.0039 0.0000
24 0.0036 0.0000
25 0.0036 0.0000
26 0.0034 0.0000
27 0.0034 0.0000
28 0.0033 0.0000
29 0.0030 0.0000
30 0.0028 0.0000
31 0.0027 0.0000
32 0.0027 0.0000
33 0.0025 0.0000
34 0.0023 0.0000
35 0.0022 0.0000
36 0.0020 0.0000
37 0.0020 0.0000
38 0.0020 0.0000
39 0.0020 0.0000
40 0.0020 0.0000
41 0.0018 0.0000
42 0.0016 0.0000
43 0.0016 0.0000
44 0.0014 0.0000
45 0.0013 0.0000
46 0.0013 0.0000
47 0.0012 0.0000
48 0.0009 0.0000
49 0.0009 0.0000
22264-MODEL 7/11/2022 8:35:37 PM Page 18
50 0.0008 0.0000
51 0.0007 0.0000
52 0.0007 0.0000
53 0.0006 0.0000
54 0.0005 0.0000
55 0.0005 0.0000
56 0.0005 0.0000
57 0.0003 0.0000
58 0.0003 0.0000
59 0.0002 0.0000
60 0.0002 0.0000
61 0.0001 0.0000
22264-MODEL 7/11/2022 8:35:37 PM Page 19
LID Duration Flows
The Facility PASSED
Flow(cfs)Predev Mit Percentage Pass/Fail
0.0002 119499 186 0 Pass
0.0002 115371 186 0 Pass
0.0002 111457 185 0 Pass
0.0002 107842 184 0 Pass
0.0002 104442 184 0 Pass
0.0003 101276 184 0 Pass
0.0003 98538 183 0 Pass
0.0003 95693 182 0 Pass
0.0003 92977 182 0 Pass
0.0003 90389 181 0 Pass
0.0003 87908 180 0 Pass
0.0003 85512 179 0 Pass
0.0003 83267 179 0 Pass
0.0003 81170 178 0 Pass
0.0004 79160 178 0 Pass
0.0004 77256 177 0 Pass
0.0004 75609 177 0 Pass
0.0004 73877 176 0 Pass
0.0004 72273 176 0 Pass
0.0004 70733 175 0 Pass
0.0004 69214 175 0 Pass
0.0004 67738 174 0 Pass
0.0004 66369 173 0 Pass
0.0005 65065 173 0 Pass
0.0005 63760 173 0 Pass
0.0005 62648 172 0 Pass
0.0005 61471 171 0 Pass
0.0005 60359 171 0 Pass
0.0005 59247 171 0 Pass
0.0005 58178 170 0 Pass
0.0005 57087 169 0 Pass
0.0005 56103 169 0 Pass
0.0006 55119 169 0 Pass
0.0006 54178 168 0 Pass
0.0006 53258 167 0 Pass
0.0006 52445 167 0 Pass
0.0006 51547 167 0 Pass
0.0006 50756 166 0 Pass
0.0006 49921 166 0 Pass
0.0006 49109 165 0 Pass
0.0006 48360 165 0 Pass
0.0007 47590 164 0 Pass
0.0007 46863 164 0 Pass
0.0007 46136 163 0 Pass
0.0007 45430 163 0 Pass
0.0007 44831 163 0 Pass
0.0007 44168 162 0 Pass
0.0007 43526 161 0 Pass
0.0007 42906 161 0 Pass
0.0007 42328 161 0 Pass
0.0008 41751 160 0 Pass
0.0008 41173 159 0 Pass
0.0008 40617 159 0 Pass
22264-MODEL 7/11/2022 8:35:37 PM Page 20
0.0008 40104 159 0 Pass
0.0008 39548 158 0 Pass
0.0008 39077 157 0 Pass
0.0008 38564 157 0 Pass
0.0008 38072 157 0 Pass
0.0008 37602 156 0 Pass
0.0008 37088 155 0 Pass
0.0009 36618 155 0 Pass
0.0009 36147 155 0 Pass
0.0009 35677 154 0 Pass
0.0009 35206 154 0 Pass
0.0009 34778 153 0 Pass
0.0009 34350 153 0 Pass
0.0009 33944 153 0 Pass
0.0009 33495 151 0 Pass
0.0009 33067 150 0 Pass
0.0010 32661 150 0 Pass
0.0010 32254 150 0 Pass
0.0010 31848 149 0 Pass
0.0010 31442 148 0 Pass
0.0010 31057 148 0 Pass
0.0010 30672 148 0 Pass
0.0010 30308 147 0 Pass
0.0010 29944 147 0 Pass
0.0010 29581 146 0 Pass
0.0011 29174 146 0 Pass
0.0011 28832 146 0 Pass
0.0011 28468 145 0 Pass
0.0011 28083 144 0 Pass
0.0011 27741 144 0 Pass
0.0011 27399 144 0 Pass
0.0011 27057 143 0 Pass
0.0011 26779 142 0 Pass
0.0011 26458 142 0 Pass
0.0012 26137 142 0 Pass
0.0012 25838 142 0 Pass
0.0012 25538 141 0 Pass
0.0012 25239 140 0 Pass
0.0012 24961 140 0 Pass
0.0012 24640 140 0 Pass
0.0012 24319 139 0 Pass
0.0012 24020 138 0 Pass
0.0012 23763 138 0 Pass
0.0013 23485 138 0 Pass
0.0013 23228 138 0 Pass
0.0013 22950 137 0 Pass
0.0013 22672 136 0 Pass
22264-MODEL 7/11/2022 8:35:59 PM Page 21
Duration Flows
Flow(cfs)Predev Mit Percentage Pass/Fail
0.0013 22672 136 0 Pass
0.0014 19785 131 0 Pass
0.0015 17323 125 0 Pass
0.0017 15272 120 0 Pass
0.0018 13383 115 0 Pass
0.0019 11890 110 0 Pass
0.0021 10628 105 0 Pass
0.0022 9428 101 1 Pass
0.0023 8361 96 1 Pass
0.0025 7441 90 1 Pass
0.0026 6686 86 1 Pass
0.0027 6006 82 1 Pass
0.0029 5407 78 1 Pass
0.0030 4885 72 1 Pass
0.0031 4421 68 1 Pass
0.0032 4021 63 1 Pass
0.0034 3664 58 1 Pass
0.0035 3343 54 1 Pass
0.0036 3082 50 1 Pass
0.0038 2817 46 1 Pass
0.0039 2582 41 1 Pass
0.0040 2387 37 1 Pass
0.0042 2201 32 1 Pass
0.0043 2005 26 1 Pass
0.0044 1829 19 1 Pass
0.0045 1676 17 1 Pass
0.0047 1525 14 0 Pass
0.0048 1406 11 0 Pass
0.0049 1282 7 0 Pass
0.0051 1164 7 0 Pass
0.0052 1071 7 0 Pass
0.0053 974 7 0 Pass
0.0055 889 7 0 Pass
0.0056 811 7 0 Pass
0.0057 742 7 0 Pass
0.0059 672 7 1 Pass
0.0060 610 6 0 Pass
0.0061 558 6 1 Pass
0.0062 519 6 1 Pass
0.0064 485 6 1 Pass
0.0065 445 6 1 Pass
0.0066 411 6 1 Pass
0.0068 381 6 1 Pass
0.0069 350 6 1 Pass
0.0070 305 6 1 Pass
0.0072 283 6 2 Pass
0.0073 268 6 2 Pass
0.0074 253 6 2 Pass
0.0075 241 6 2 Pass
0.0077 227 6 2 Pass
0.0078 221 6 2 Pass
0.0079 214 6 2 Pass
0.0081 206 6 2 Pass
0.0082 196 6 3 Pass
22264-MODEL 7/11/2022 8:35:59 PM Page 22
0.0083 182 6 3 Pass
0.0085 169 6 3 Pass
0.0086 160 6 3 Pass
0.0087 156 6 3 Pass
0.0089 151 6 3 Pass
0.0090 146 6 4 Pass
0.0091 141 6 4 Pass
0.0092 134 6 4 Pass
0.0094 124 6 4 Pass
0.0095 119 6 5 Pass
0.0096 113 6 5 Pass
0.0098 110 6 5 Pass
0.0099 105 6 5 Pass
0.0100 99 6 6 Pass
0.0102 94 6 6 Pass
0.0103 87 6 6 Pass
0.0104 81 6 7 Pass
0.0105 74 5 6 Pass
0.0107 68 5 7 Pass
0.0108 61 5 8 Pass
0.0109 56 5 8 Pass
0.0111 52 5 9 Pass
0.0112 39 5 12 Pass
0.0113 14 5 35 Pass
0.0115 6 5 83 Pass
0.0116 4 5 125 Fail
0.0117 2 5 250 Fail
0.0119 0 5 n/a Fail
0.0120 0 5 n/a Fail
0.0121 0 5 n/a Fail
0.0122 0 5 n/a Fail
0.0124 0 5 n/a Fail
0.0125 0 5 n/a Fail
0.0126 0 5 n/a Fail
0.0128 0 5 n/a Fail
0.0129 0 5 n/a Fail
0.0130 0 5 n/a Fail
0.0132 0 5 n/a Fail
0.0133 0 5 n/a Fail
0.0134 0 5 n/a Fail
0.0135 0 5 n/a Fail
0.0137 0 5 n/a Fail
0.0138 0 5 n/a Fail
0.0139 0 5 n/a Fail
0.0141 0 5 n/a Fail
0.0142 0 5 n/a Fail
The development has an increase in flow durations
from 1/2 Predeveloped 2 year flow to the 2 year flow
or more than a 10% increase from the 2 year to the 50
year flow.
22264-MODEL 7/11/2022 8:35:59 PM Page 23
Water Quality
Water Quality BMP Flow and Volume for POC #1
On-line facility volume:0 acre-feet
On-line facility target flow:0 cfs.
Adjusted for 15 min:0 cfs.
Off-line facility target flow:0 cfs.
Adjusted for 15 min:0 cfs.
22264-MODEL 7/11/2022 8:35:59 PM Page 24
LID Report
22264-MODEL 7/11/2022 8:36:21 PM Page 25
Model Default Modifications
Total of 0 changes have been made.
PERLND Changes
No PERLND changes have been made.
IMPLND Changes
No IMPLND changes have been made.
22264-MODEL 7/11/2022 8:36:21 PM Page 26
Appendix
Predeveloped Schematic
22264-MODEL 7/11/2022 8:36:22 PM Page 27
Mitigated Schematic
22264-MODEL 7/11/2022 8:36:24 PM Page 28
Predeveloped UCI File
22264-MODEL 7/11/2022 8:36:24 PM Page 29
Mitigated UCI File
RUN
GLOBAL
WWHM4 model simulation
START 1948 10 01 END 2009 09 30
RUN INTERP OUTPUT LEVEL 3 0
RESUME 0 RUN 1 UNIT SYSTEM 1
END GLOBAL
FILES
<File> <Un#> <-----------File Name------------------------------>***
<-ID-> ***
WDM 26 22264-MODEL.wdm
MESSU 25 Mit22264-MODEL.MES
27 Mit22264-MODEL.L61
28 Mit22264-MODEL.L62
30 POC22264-MODEL1.dat
END FILES
OPN SEQUENCE
INGRP INDELT 00:15
IMPLND 4
IMPLND 16
RCHRES 1
PERLND 38
RCHRES 2
COPY 1
COPY 501
DISPLY 1
END INGRP
END OPN SEQUENCE
DISPLY
DISPLY-INFO1
# - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND
1 Gravel Trench Bed 1 MAX 1 2 30 9
END DISPLY-INFO1
END DISPLY
COPY
TIMESERIES
# - # NPT NMN ***
1 1 1
501 1 1
END TIMESERIES
END COPY
GENER
OPCODE
# # OPCD ***
END OPCODE
PARM
# # K ***
END PARM
END GENER
PERLND
GEN-INFO
<PLS ><-------Name------->NBLKS Unit-systems Printer ***
# - # User t-series Engl Metr ***
in out ***
38 C, Pasture, Flat 1 1 1 1 27 0
END GEN-INFO
*** Section PWATER***
ACTIVITY
<PLS > ************* Active Sections *****************************
# - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ***
38 0 0 1 0 0 0 0 0 0 0 0 0
END ACTIVITY
PRINT-INFO
22264-MODEL 7/11/2022 8:36:24 PM Page 30
<PLS > ***************** Print-flags ***************************** PIVL PYR
# - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *********
38 0 0 4 0 0 0 0 0 0 0 0 0 1 9
END PRINT-INFO
PWAT-PARM1
<PLS > PWATER variable monthly parameter value flags ***
# - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT ***
38 0 0 0 0 0 0 0 0 0 0 0
END PWAT-PARM1
PWAT-PARM2
<PLS > PWATER input info: Part 2 ***
# - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC
38 0 4.5 0.06 400 0.05 0.5 0.996
END PWAT-PARM2
PWAT-PARM3
<PLS > PWATER input info: Part 3 ***
# - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP
38 0 0 2 2 0 0 0
END PWAT-PARM3
PWAT-PARM4
<PLS > PWATER input info: Part 4 ***
# - # CEPSC UZSN NSUR INTFW IRC LZETP ***
38 0.15 0.4 0.3 6 0.5 0.4
END PWAT-PARM4
PWAT-STATE1
<PLS > *** Initial conditions at start of simulation
ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 ***
# - # *** CEPS SURS UZS IFWS LZS AGWS GWVS
38 0 0 0 0 2.5 1 0
END PWAT-STATE1
END PERLND
IMPLND
GEN-INFO
<PLS ><-------Name-------> Unit-systems Printer ***
# - # User t-series Engl Metr ***
in out ***
4 ROOF TOPS/FLAT 1 1 1 27 0
16 ROADS/FLAT LAT 1 1 1 27 0
END GEN-INFO
*** Section IWATER***
ACTIVITY
<PLS > ************* Active Sections *****************************
# - # ATMP SNOW IWAT SLD IWG IQAL ***
4 0 0 1 0 0 0
16 0 0 1 0 0 0
END ACTIVITY
PRINT-INFO
<ILS > ******** Print-flags ******** PIVL PYR
# - # ATMP SNOW IWAT SLD IWG IQAL *********
4 0 0 4 0 0 0 1 9
16 0 0 4 0 0 0 1 9
END PRINT-INFO
IWAT-PARM1
<PLS > IWATER variable monthly parameter value flags ***
# - # CSNO RTOP VRS VNN RTLI ***
4 0 0 0 0 0
16 0 0 0 0 0
END IWAT-PARM1
IWAT-PARM2
<PLS > IWATER input info: Part 2 ***
22264-MODEL 7/11/2022 8:36:24 PM Page 31
# - # *** LSUR SLSUR NSUR RETSC
4 400 0.01 0.1 0.1
16 400 0.01 0.1 0.1
END IWAT-PARM2
IWAT-PARM3
<PLS > IWATER input info: Part 3 ***
# - # ***PETMAX PETMIN
4 0 0
16 0 0
END IWAT-PARM3
IWAT-STATE1
<PLS > *** Initial conditions at start of simulation
# - # *** RETS SURS
4 0 0
16 0 0
END IWAT-STATE1
END IMPLND
SCHEMATIC
<-Source-> <--Area--> <-Target-> MBLK ***
<Name> # <-factor-> <Name> # Tbl# ***
Basin 1***
IMPLND 4 0.122 RCHRES 1 5
Lateral I Basin 1***
IMPLND 16 0.28 PERLND 38 50
Lateral Basin 1***
PERLND 38 0.25 RCHRES 2 2
PERLND 38 0.25 RCHRES 2 3
******Routing******
IMPLND 4 0.122 COPY 1 15
PERLND 38 0.25 COPY 1 12
PERLND 38 0.25 COPY 1 13
RCHRES 1 1 COPY 501 17
RCHRES 2 1 COPY 501 17
END SCHEMATIC
NETWORK
<-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> ***
<Name> # <Name> # #<-factor->strg <Name> # # <Name> # # ***
COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1
<-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> ***
<Name> # <Name> # #<-factor->strg <Name> # # <Name> # # ***
END NETWORK
RCHRES
GEN-INFO
RCHRES Name Nexits Unit Systems Printer ***
# - #<------------------><---> User T-series Engl Metr LKFG ***
in out ***
1 Gravel Trench Be-007 2 1 1 1 28 0 1
2 Trapezoidal Pond-011 2 1 1 1 28 0 1
END GEN-INFO
*** Section RCHRES***
ACTIVITY
<PLS > ************* Active Sections *****************************
# - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG ***
1 1 0 0 0 0 0 0 0 0 0
2 1 0 0 0 0 0 0 0 0 0
END ACTIVITY
PRINT-INFO
<PLS > ***************** Print-flags ******************* PIVL PYR
22264-MODEL 7/11/2022 8:36:24 PM Page 32
# - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR *********
1 4 0 0 0 0 0 0 0 0 0 1 9
2 4 0 0 0 0 0 0 0 0 0 1 9
END PRINT-INFO
HYDR-PARM1
RCHRES Flags for each HYDR Section ***
# - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each
FG FG FG FG possible exit *** possible exit possible exit
* * * * * * * * * * * * * * ***
1 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2
2 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2
END HYDR-PARM1
HYDR-PARM2
# - # FTABNO LEN DELTH STCOR KS DB50 ***
<------><--------><--------><--------><--------><--------><--------> ***
1 1 0.01 0.0 0.0 0.5 0.0
2 2 0.02 0.0 0.0 0.5 0.0
END HYDR-PARM2
HYDR-INIT
RCHRES Initial conditions for each HYDR section ***
# - # *** VOL Initial value of COLIND Initial value of OUTDGT
*** ac-ft for each possible exit for each possible exit
<------><--------> <---><---><---><---><---> *** <---><---><---><---><--->
1 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
2 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
END HYDR-INIT
END RCHRES
SPEC-ACTIONS
END SPEC-ACTIONS
FTABLES
FTABLE 1
92 5
Depth Area Volume Outflow1 Outflow2 Velocity Travel Time***
(ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)***
0.000000 0.003788 0.000000 0.000000 0.000000
0.044444 0.003789 0.000056 0.000000 0.019103
0.088889 0.003790 0.000111 0.000000 0.019109
0.133333 0.003791 0.000167 0.000000 0.019115
0.177778 0.003793 0.000222 0.000000 0.019121
0.222222 0.003794 0.000278 0.000000 0.019127
0.266667 0.003795 0.000334 0.000000 0.019133
0.311111 0.003796 0.000389 0.000000 0.019139
0.355556 0.003797 0.000445 0.000000 0.019145
0.400000 0.003799 0.000501 0.000000 0.019151
0.444444 0.003800 0.000556 0.000000 0.019157
0.488889 0.003801 0.000612 0.000000 0.019163
0.533333 0.003802 0.000668 0.000000 0.019169
0.577778 0.003803 0.000724 0.000000 0.019175
0.622222 0.003804 0.000779 0.000000 0.019181
0.666667 0.003806 0.000835 0.000000 0.019187
0.711111 0.003807 0.000891 0.000000 0.019193
0.755556 0.003808 0.000947 0.000000 0.019199
0.800000 0.003809 0.001003 0.000000 0.019205
0.844444 0.003810 0.001059 0.000000 0.019211
0.888889 0.003812 0.001115 0.000000 0.019217
0.933333 0.003813 0.001170 0.000000 0.019223
0.977778 0.003814 0.001226 0.000000 0.019229
1.022222 0.003815 0.001282 0.000000 0.019235
1.066667 0.003816 0.001338 0.000000 0.019240
1.111111 0.003817 0.001394 0.000000 0.019246
1.155556 0.003819 0.001450 0.000000 0.019252
1.200000 0.003820 0.001506 0.000000 0.019258
1.244444 0.003821 0.001562 0.000000 0.019264
1.288889 0.003822 0.001618 0.000000 0.019270
1.333333 0.003823 0.001674 0.000000 0.019276
1.377778 0.003825 0.001731 0.000000 0.019282
1.422222 0.003826 0.001787 0.000000 0.019288
22264-MODEL 7/11/2022 8:36:24 PM Page 33
1.466667 0.003827 0.001843 0.000000 0.019294
1.511111 0.003828 0.001899 0.000000 0.019300
1.555556 0.003829 0.001955 0.000000 0.019306
1.600000 0.003831 0.002011 0.000000 0.019312
1.644444 0.003832 0.002067 0.000000 0.019318
1.688889 0.003833 0.002124 0.000000 0.019324
1.733333 0.003834 0.002180 0.000000 0.019330
1.777778 0.003835 0.002236 0.000000 0.019336
1.822222 0.003836 0.002292 0.000000 0.019342
1.866667 0.003838 0.002349 0.000000 0.019348
1.911111 0.003839 0.002405 0.000000 0.019354
1.955556 0.003840 0.002461 0.000000 0.019360
2.000000 0.003841 0.002518 0.000000 0.019366
2.044444 0.003842 0.002574 0.000000 0.019372
2.088889 0.003844 0.002630 0.000000 0.019378
2.133333 0.003845 0.002687 0.000000 0.019384
2.177778 0.003846 0.002743 0.000000 0.019390
2.222222 0.003847 0.002799 0.000000 0.019396
2.266667 0.003848 0.002856 0.000000 0.019402
2.311111 0.003849 0.002912 0.000000 0.019408
2.355556 0.003851 0.002969 0.000000 0.019414
2.400000 0.003852 0.003025 0.000000 0.019420
2.444444 0.003853 0.003082 0.000000 0.019426
2.488889 0.003854 0.003138 0.000000 0.019432
2.533333 0.003855 0.003195 0.000000 0.019438
2.577778 0.003857 0.003251 0.000000 0.019444
2.622222 0.003858 0.003308 0.000000 0.019450
2.666667 0.003859 0.003365 0.000000 0.019456
2.711111 0.003860 0.003421 0.000000 0.019462
2.755556 0.003861 0.003478 0.000000 0.019468
2.800000 0.003863 0.003534 0.000000 0.019474
2.844444 0.003864 0.003591 0.000000 0.019479
2.888889 0.003865 0.003648 0.000000 0.019485
2.933333 0.003866 0.003704 0.000000 0.019491
2.977778 0.003867 0.003761 0.000000 0.019497
3.022222 0.003868 0.003933 0.029284 0.019503
3.066667 0.003870 0.004105 0.151685 0.019509
3.111111 0.003871 0.004277 0.323094 0.019515
3.155556 0.003872 0.004449 0.523118 0.019521
3.200000 0.003873 0.004621 0.732975 0.019527
3.244444 0.003874 0.004793 0.933531 0.019533
3.288889 0.003876 0.004966 1.107385 0.019539
3.333333 0.003877 0.005138 1.242541 0.019545
3.377778 0.003878 0.005310 1.337097 0.019551
3.422222 0.003879 0.005483 1.421241 0.019557
3.466667 0.003880 0.005655 1.494171 0.019563
3.511111 0.003881 0.005828 1.563705 0.019569
3.555556 0.003883 0.006000 1.630275 0.019575
3.600000 0.003884 0.006173 1.694231 0.019581
3.644444 0.003885 0.006345 1.755860 0.019587
3.688889 0.003886 0.006518 1.815397 0.019593
3.733333 0.003887 0.006691 1.873043 0.019599
3.777778 0.003889 0.006864 1.928967 0.019605
3.822222 0.003890 0.007036 1.983315 0.019611
3.866667 0.003891 0.007209 2.036212 0.019617
3.911111 0.003892 0.007382 2.087770 0.019623
3.955556 0.003893 0.007555 2.138085 0.019629
4.000000 0.003895 0.007728 2.187243 0.019635
4.044444 0.003896 0.007901 2.235320 0.019641
END FTABLE 1
FTABLE 2
91 5
Depth Area Volume Outflow1 Outflow2 Velocity Travel Time***
(ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)***
0.000000 0.027548 0.000000 0.000000 0.000000
0.011111 0.027720 0.000307 0.000000 0.005556
0.022222 0.027891 0.000616 0.000000 0.005556
0.033333 0.028063 0.000927 0.000000 0.005556
0.044444 0.028235 0.001240 0.000000 0.005556
0.055556 0.028408 0.001554 0.000000 0.005556
22264-MODEL 7/11/2022 8:36:24 PM Page 34
0.066667 0.028580 0.001871 0.000000 0.005556
0.077778 0.028753 0.002189 0.000000 0.005556
0.088889 0.028926 0.002510 0.000000 0.005556
0.100000 0.029099 0.002832 0.000000 0.005556
0.111111 0.029273 0.003157 0.000000 0.005556
0.122222 0.029446 0.003483 0.000000 0.005556
0.133333 0.029620 0.003811 0.000000 0.005556
0.144444 0.029794 0.004141 0.000000 0.005556
0.155556 0.029968 0.004473 0.000000 0.005556
0.166667 0.030142 0.004807 0.000000 0.005556
0.177778 0.030317 0.005143 0.000000 0.005556
0.188889 0.030492 0.005481 0.000000 0.005556
0.200000 0.030667 0.005820 0.000000 0.005556
0.211111 0.030842 0.006162 0.000000 0.005556
0.222222 0.031017 0.006506 0.000000 0.005556
0.233333 0.031193 0.006851 0.000000 0.005556
0.244444 0.031369 0.007199 0.000000 0.005556
0.255556 0.031545 0.007548 0.000000 0.005556
0.266667 0.031721 0.007900 0.000000 0.005556
0.277778 0.031897 0.008253 0.000000 0.005556
0.288889 0.032074 0.008609 0.000000 0.005556
0.300000 0.032251 0.008966 0.000000 0.005556
0.311111 0.032428 0.009325 0.000000 0.005556
0.322222 0.032605 0.009687 0.000000 0.005556
0.333333 0.032782 0.010050 0.000000 0.005556
0.344444 0.032960 0.010415 0.000000 0.005556
0.355556 0.033138 0.010782 0.000000 0.005556
0.366667 0.033316 0.011152 0.000000 0.005556
0.377778 0.033494 0.011523 0.000000 0.005556
0.388889 0.033673 0.011896 0.000000 0.005556
0.400000 0.033851 0.012271 0.000000 0.005556
0.411111 0.034030 0.012648 0.000000 0.005556
0.422222 0.034209 0.013027 0.000000 0.005556
0.433333 0.034388 0.013408 0.000000 0.005556
0.444444 0.034568 0.013791 0.000000 0.005556
0.455556 0.034748 0.014177 0.000000 0.005556
0.466667 0.034927 0.014564 0.000000 0.005556
0.477778 0.035108 0.014953 0.000000 0.005556
0.488889 0.035288 0.015344 0.000000 0.005556
0.500000 0.035468 0.015737 0.000000 0.005556
0.511111 0.035649 0.016132 0.008286 0.005556
0.522222 0.035830 0.016529 0.023421 0.005556
0.533333 0.036011 0.016928 0.042996 0.005556
0.544444 0.036192 0.017329 0.066130 0.005556
0.555556 0.036374 0.017733 0.092279 0.005556
0.566667 0.036556 0.018138 0.121030 0.005556
0.577778 0.036737 0.018545 0.152030 0.005556
0.588889 0.036920 0.018954 0.184950 0.005556
0.600000 0.037102 0.019365 0.219469 0.005556
0.611111 0.037284 0.019779 0.255267 0.005556
0.622222 0.037467 0.020194 0.292015 0.005556
0.633333 0.037650 0.020611 0.329384 0.005556
0.644444 0.037833 0.021031 0.367036 0.005556
0.655556 0.038017 0.021452 0.404632 0.005556
0.666667 0.038200 0.021875 0.441835 0.005556
0.677778 0.038384 0.022301 0.478315 0.005556
0.688889 0.038568 0.022728 0.513750 0.005556
0.700000 0.038752 0.023158 0.547841 0.005556
0.711111 0.038936 0.023589 0.580309 0.005556
0.722222 0.039121 0.024023 0.610909 0.005556
0.733333 0.039306 0.024459 0.639435 0.005556
0.744444 0.039491 0.024897 0.665728 0.005556
0.755556 0.039676 0.025336 0.689686 0.005556
0.766667 0.039861 0.025778 0.711272 0.005556
0.777778 0.040047 0.026222 0.730523 0.005556
0.788889 0.040233 0.026668 0.747561 0.005556
0.800000 0.040419 0.027116 0.762603 0.005556
0.811111 0.040605 0.027566 0.775972 0.005556
0.822222 0.040791 0.028019 0.788103 0.005556
0.833333 0.040978 0.028473 0.799562 0.005556
22264-MODEL 7/11/2022 8:36:24 PM Page 35
0.844444 0.041165 0.028929 0.821555 0.005556
0.855556 0.041352 0.029388 0.834701 0.005556
0.866667 0.041539 0.029848 0.847643 0.005556
0.877778 0.041726 0.030311 0.860390 0.005556
0.888889 0.041914 0.030775 0.872951 0.005556
0.900000 0.042102 0.031242 0.885334 0.005556
0.911111 0.042290 0.031711 0.897546 0.005556
0.922222 0.042478 0.032182 0.909594 0.005556
0.933333 0.042667 0.032655 0.921485 0.005556
0.944444 0.042855 0.033130 0.933224 0.005556
0.955556 0.043044 0.033607 0.944817 0.005556
0.966667 0.043233 0.034087 0.956270 0.005556
0.977778 0.043423 0.034568 0.967587 0.005556
0.988889 0.043612 0.035052 0.978773 0.005556
1.000000 0.043802 0.035537 0.989833 0.005556
END FTABLE 2
END FTABLES
EXT SOURCES
<-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> ***
<Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # ***
WDM 2 PREC ENGL 0.8 PERLND 1 999 EXTNL PREC
WDM 2 PREC ENGL 0.8 IMPLND 1 999 EXTNL PREC
WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP
WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP
END EXT SOURCES
EXT TARGETS
<-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd ***
<Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg***
RCHRES 1 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL
RCHRES 1 HYDR O 1 1 1 WDM 1001 FLOW ENGL REPL
RCHRES 1 HYDR O 2 1 1 WDM 1002 FLOW ENGL REPL
RCHRES 1 HYDR STAGE 1 1 1 WDM 1003 STAG ENGL REPL
COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL
COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL
RCHRES 2 HYDR RO 1 1 1 WDM 1004 FLOW ENGL REPL
RCHRES 2 HYDR O 1 1 1 WDM 1005 FLOW ENGL REPL
RCHRES 2 HYDR O 2 1 1 WDM 1006 FLOW ENGL REPL
RCHRES 2 HYDR STAGE 1 1 1 WDM 1007 STAG ENGL REPL
END EXT TARGETS
MASS-LINK
<Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->***
<Name> <Name> # #<-factor-> <Name> <Name> # #***
MASS-LINK 2
PERLND PWATER SURO 0.083333 RCHRES INFLOW IVOL
END MASS-LINK 2
MASS-LINK 3
PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL
END MASS-LINK 3
MASS-LINK 5
IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL
END MASS-LINK 5
MASS-LINK 12
PERLND PWATER SURO 0.083333 COPY INPUT MEAN
END MASS-LINK 12
MASS-LINK 13
PERLND PWATER IFWO 0.083333 COPY INPUT MEAN
END MASS-LINK 13
MASS-LINK 15
IMPLND IWATER SURO 0.083333 COPY INPUT MEAN
END MASS-LINK 15
22264-MODEL 7/11/2022 8:36:24 PM Page 36
MASS-LINK 17
RCHRES OFLOW OVOL 1 COPY INPUT MEAN
END MASS-LINK 17
MASS-LINK 50
IMPLND IWATER SURO PERLND EXTNL SURLI
END MASS-LINK 50
END MASS-LINK
END RUN
22264-MODEL 7/11/2022 8:36:24 PM Page 37
Predeveloped HSPF Message File
22264-MODEL 7/11/2022 8:36:24 PM Page 38
Mitigated HSPF Message File
ERROR/WARNING ID: 238 1
The continuity error reported below is greater than 1 part in 1000 and is
therefore considered high.
Did you specify any "special actions"? If so, they could account for it.
Relevant data are:
DATE/TIME: 1957/ 7/31 24: 0
RCHRES : 2
RELERR STORS STOR MATIN MATDIF
-1.241E-02 0.00000 0.0000E+00 0.00000 6.6929E-13
Where:
RELERR is the relative error (ERROR/REFVAL).
ERROR is (STOR-STORS) - MATDIF.
REFVAL is the reference value (STORS+MATIN).
STOR is the storage of material in the processing unit (land-segment or
reach/reservior) at the end of the present interval.
STORS is the storage of material in the pu at the start of the present
printout reporting period.
MATIN is the total inflow of material to the pu during the present printout
reporting period.
MATDIF is the net inflow (inflow-outflow) of material to the pu during the
present printout reporting period.
ERROR/WARNING ID: 238 1
The continuity error reported below is greater than 1 part in 1000 and is
therefore considered high.
Did you specify any "special actions"? If so, they could account for it.
Relevant data are:
DATE/TIME: 1976/ 6/30 24: 0
RCHRES : 2
RELERR STORS STOR MATIN MATDIF
-3.281E-02 0.00000 0.0000E+00 0.00000 1.4543E-12
Where:
RELERR is the relative error (ERROR/REFVAL).
ERROR is (STOR-STORS) - MATDIF.
REFVAL is the reference value (STORS+MATIN).
STOR is the storage of material in the processing unit (land-segment or
reach/reservior) at the end of the present interval.
STORS is the storage of material in the pu at the start of the present
printout reporting period.
MATIN is the total inflow of material to the pu during the present printout
reporting period.
MATDIF is the net inflow (inflow-outflow) of material to the pu during the
present printout reporting period.
ERROR/WARNING ID: 238 1
The continuity error reported below is greater than 1 part in 1000 and is
therefore considered high.
Did you specify any "special actions"? If so, they could account for it.
Relevant data are:
22264-MODEL 7/11/2022 8:36:24 PM Page 39
DATE/TIME: 1998/ 8/31 24: 0
RCHRES : 2
RELERR STORS STOR MATIN MATDIF
-2.182E-02 0.00000 0.0000E+00 0.00000 8.7214E-13
Where:
RELERR is the relative error (ERROR/REFVAL).
ERROR is (STOR-STORS) - MATDIF.
REFVAL is the reference value (STORS+MATIN).
STOR is the storage of material in the processing unit (land-segment or
reach/reservior) at the end of the present interval.
STORS is the storage of material in the pu at the start of the present
printout reporting period.
MATIN is the total inflow of material to the pu during the present printout
reporting period.
MATDIF is the net inflow (inflow-outflow) of material to the pu during the
present printout reporting period.
ERROR/WARNING ID: 238 1
The continuity error reported below is greater than 1 part in 1000 and is
therefore considered high.
Did you specify any "special actions"? If so, they could account for it.
Relevant data are:
DATE/TIME: 2001/ 6/30 24: 0
RCHRES : 2
RELERR STORS STOR MATIN MATDIF
-7.770E-03 0.00000 0.0000E+00 0.00000 1.6254E-12
Where:
RELERR is the relative error (ERROR/REFVAL).
ERROR is (STOR-STORS) - MATDIF.
REFVAL is the reference value (STORS+MATIN).
STOR is the storage of material in the processing unit (land-segment or
reach/reservior) at the end of the present interval.
STORS is the storage of material in the pu at the start of the present
printout reporting period.
MATIN is the total inflow of material to the pu during the present printout
reporting period.
MATDIF is the net inflow (inflow-outflow) of material to the pu during the
present printout reporting period.
ERROR/WARNING ID: 238 1
The continuity error reported below is greater than 1 part in 1000 and is
therefore considered high.
Did you specify any "special actions"? If so, they could account for it.
Relevant data are:
DATE/TIME: 2006/ 8/31 24: 0
RCHRES : 2
RELERR STORS STOR MATIN MATDIF
-1.346E-02 0.00000 0.0000E+00 0.00000 8.3372E-13
Where:
RELERR is the relative error (ERROR/REFVAL).
ERROR is (STOR-STORS) - MATDIF.
22264-MODEL 7/11/2022 8:36:24 PM Page 40
REFVAL is the reference value (STORS+MATIN).
STOR is the storage of material in the processing unit (land-segment or
reach/reservior) at the end of the present interval.
STORS is the storage of material in the pu at the start of the present
printout reporting period.
MATIN is the total inflow of material to the pu during the present printout
reporting period.
MATDIF is the net inflow (inflow-outflow) of material to the pu during the
present printout reporting period.
The count for the WARNING printed above has reached its maximum.
If the condition is encountered again the message will not be repeated.
22264-MODEL 7/11/2022 8:36:24 PM Page 41
Disclaimer
Legal Notice
This program and accompanying documentation is provided 'as-is' without warranty of any kind. The
entire risk regarding the performance and results of this program is assumed by the user. Clear Creek
Solutions, Inc. disclaims all warranties, either expressed or implied, including but not limited to
implied warranties of program and accompanying documentation. In no event shall Clear Creek
Solutions, Inc. be liable for any damages whatsoever (including without limitation to damages for
loss of business profits, loss of business information, business interruption, and the like) arising
out of the use of, or inability to use this program even if Clear Creek Solutions, Inc. has been
advised of the possibility of such damages.
Clear Creek Solutions, Inc.
6200 Capitol Blvd. Ste F
Olympia, WA. 98501
Toll Free 1(866)943-0304
Local (360)943-0304
www.clearcreeksolutions.com