HomeMy WebLinkAboutZON2022-00037_05 (1) STORMWATER MANAGEMENT APPLICATIONDEPARTMENT OF COMMUNITY DEVELOPMENT
621 Sheridan Street, Port Townsend, WA 98368
Tel; 360.379.21450 | Fax: 350.379.4451
Web : www.co.ieff erson.wa.us/communitvdevelopment
E-mail: dcd@co.iefferson.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 Stormwoter Monogement Manual for the Puget Sound Eosin (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 lond use permit, stormwater review will occur os part of your overoll applicotion
review. A stond olone stormwater monogement permit is required for cleoring and grading ddivities exceeding 7,(XN
sq/lt that do not involve a building permit or other lond use opprovol (ie. preparing lond for future construdion,
cleoring for speculotive purposes, etc,).
A stormwater management permit is required for the following activities:
o All grading of 5fi) cubic yards or more; except for those activities exempted under JCC 18.3O.07q51o All clearing and grading activities within enuironmentally sensitive areas as defined within 18.22 of
the JCC;o Landdisturbing activities of 7,fl10 square feet or more; oro Creation of 2,(XXl 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:
o Maintenance of gravel roads;o A SEPA-exempt residential driveway;o Construction of a Class l-lll logging road (per RCW 76.09.050 and WAC222l;o Construction of drainage improvements in accordance with the JCC; or
o 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.t3O(2) all new development activity, including single-family residential construction, located on
Marrowstone lsland, lndian lsland and within 500 feet of any marine shoreline is required to infilffate stormwater
runoff onsite, to the maximum extent prdcticable. 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. ln 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 disposalare not practicableorfeasible. The report must include costfiguresforcomparison.
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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 Moster progrom, 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 loint 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:
r Small Parcel Erosion and Sediment Control Plan;o Large Parcel Erosion and Sediment Control Plan;o 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 L8.30.070, and any other applicable requirements of the JCC.
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DEPARTMENT OF COMMUNITY DEVELOPMENT
621 Sheridan Street, Port Townsend, WA 98368
Tel: 360.379.21450 | Fax: 360.379.4451
Web: www.co. iefferson.wa. us/com munitvdevelopment
E-mail: dcd@co.iefferson.wa.us
SUPPLEMENTAL APPLICATION
STORMIT/ATER MANAGEMENT PERMIT
Applications for grading projects or land-disturbing activities which require a stormwater management permit shall include the following
information. This information may also be provided on other diagrams, plans, studies, or attachments submitted with the project
application. lf so, please indicate such on this permit application. The Administrator may waive specific submittal requirements
determined to be unnecessary for review of the application.
abltirl-R #PROJECT/APPLICANT NAME :
1 and ofSource of fill
C..Jrl/
of fill2. Physical
J
and compaction consistent with the in the
arn
J.Building
Le- >-^ n l.'\P-A -\It
4. Proposed surfacing material. Crv-*lr.,g-)\ Ci,,rl:rkr.\ +"p p Oj\ArV'g-\J-
Proposed method(s) of drainage and erosion controt. fi/ I I t t'e f C,rJan ls - f- le O#
Dt I 6lrr-rnun-Jev=
5.
6. Methods for restoration of the site.
I
flow of will remain unobstructed.7 that
L
8. Demonstrate that erosion and sedimentation from outflow channels will be minimized by or and
runoff will controlledthat adjacent property damage
I
that this application is being made with the full knowledge and consent of all owners of the affected
(LANDOWNER oR SIGNATURE)(DATE)
By the application form, the applicanUowner attests that the provided herein is true and correct to the best of their
knowledge. I also
property.
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Code.
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DEPARTMENT OF COMMUNITY DE\TELOPMENT
621 Sheridan Street, Port Townsend, \(';\ 98368
'Iel: 360.379.4450 | Fax: 360.379.4451
\il.'eb: uu'w.co.iefferson.wa.us/communit],'development
E-mail: dcd@co.iefferson.rva.us Scan the QR
code to access
the digitalform
STORMWATER CALCUIATI ON WO RKSHEET
PARCEL #eRo.trcr/eeelrclNT NAME
DETERMTNING 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
requ
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.
Notive vegetation is vegetation comprised of plant species, other than noxious weeds, 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.
PARCEL SIZE (I,E.. SITE)
An acre contains 43,560 square feet. Multiply the acreage by this figure
Size of parcel in square rc"t b"45, q27 sq/ft
Size of p^r""t ?. LV ,"r""
4 Cut D Fiil (cu/yd)
sq/ft
sq/ft
sq/ft
sq/ft
sq/ft
sqlft
sq/ft
Drainfield, septic tank, etc.
Well, utilities, etc.
Driveway, parking, roads, etc.
Lawn. landscaping. etc.
Other compacted surface, etc
Temporary construction area
Total Land Disturbance
lndicate Total Volumes of Proposed:
(lncludes =BMP fS.t: rilt Vql )
Answer the following two questions related to
conversion of native vegetation:
Calculate the total area to be cleared, graded, filled,
excavated, and/or compacted for proposed development
project. lnclude in this calculation the area to be cleared for:
Construction siteforstructures 1, t Ob Does the project convert To acres or more of
native vegetation to lawn or landscaped areas?
Circle: Yes
Does the project convert 2 lz acres or more of
native vegetation to pasture?
Circle: Yes
stormwater Glc worksheet QR @de - REV 581/2019 page 1 of2
6
STORMWATER CALCULATIONS - IMPERVIOUS SURFACE
lmperuious surfoce is a hard surface that either prevents or slows the entry of water into the soil as under natural
conditions prior to development. A hard surface area which causes water to run off the surface in greater
quantities or at an 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.
Total New Total Existing
TOTAL NEW + TOTAL EXISTING**This amount will be used to check total lot coverage.
oo
Sidewalks
Patios
Other
NEW
Structures (all roof area)
Sidewalks
Patios
Solid Decks
(without infi ltration below)
Driveway, parking, roads, etc
Other
EXISTING
Structures (all roof area) sq/ft
Solid Decks sq/fi
(without infiltration below;
-
Driveway, parking, roads, etc sq/ft
Divide the total existinq
impervious surface above by the
size of the parcel and convert to
a percentage.Yo
DEVELOPMENT v. REDEVELOPMENT
Does the site have > 35o/o or more
existinq impervious surface?->.>
+
yes
The proposal is considered redevelopment Answer
questions in Figure 2.4.2. Flow Chart for
Redevelopment to determine project size (next page).
- Applicants for "small" projects must comply only with Minimum Requirement #2-Construction Stormwater pollution prevention.
Please submit the Small Project Certification (Worksheet "s). 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 (SWPPP) Best Management Practices (BMps) Fact Sheet.
- Applicants for "medium" projects-those that must meet only Minimum Requirements #1 through #5 must submit Worksheet 41
and 8L, a stormwater site plan and a construction stormwater pollution prevention site plan (See Reference A1A and B14 for
guidance).).
- "Large" projects-those that must meet all 9 Minimum Requirements- must submit Worksheet A1 and 81, a stormwater site plan
and a construction stormwater pollution prevention site plan (See Reference A1A and B14 for guidance). Large projects also may
require engineering. See Worksheet L to determine additional large project requirements.
F
no
The proposal is considered new development. Answer
questions in Figure 2.4.L Flow Chart for New
Development to determine project size (next page).
APPLICANT SIGNATURE By signing the Stormwater Calculation Worksheet, I as the applicant/owner attest that the information provided herein
to the best of my knowledge. I also certify that this application is being made with the full knowledge and consent of all owners
(ut'roowrurn REPRESENTATIvE srelurunr)
and
pro
is true
of the
stormwater €lc worksheet QR @de - REV. 513112019 page 2 of 2
_sq/ft
sq/ft
-sq/ft
Start Here
Yee
No
Yes No
This is a "large" project.
Large projects refer to
Worksheet L for submittal
requirements. At a
minimum, all large Project
must submit Worksheet
A1,81, and C or
equivalent.
Yec
r ii,1!i if,,,: i-iLil.,1liil.;.1
i:r'ii i iir:t: i. Ir ili fl I f :"
l."rii::. l.il1:l::i: I 'i i , t:1 ,
,it:]1.J 4., +:'
r:'; I ll 1".':.: if i-: l,
No
Complete "Small
Flgure 2.4,1 -Flow Chartfor Determlnlng Requlrements for New Development
Doesthe sitehave
35o/o ot mofe of
existing impervious
coverage?
See Redevelopment
Minimum
Requirements urd
Flow Chart
(Figure 3.3)Does ths prcject convertt/tast* OImOr€ Of
vegetation to lawn or
landscaped areas, or
convert 2.5 acres or more
of nativo vegetationto
PssflIre?
Does the project
result in 5,000
square feet, or
greater, ofnewplus
replaccd hard
surface area?
Yes
Does the proiect
result in 2,000 square
feet, or greater, of
new plus replaced
hard surfaco area?All Minimum
Requirements apply
to thoncwand
replaccd hard surfaces
and convefted
vegetation areas.
Does the project have
land disturbing
activities of 7,000
square feet or greater?
Minimum Requirements
#1 through #5 apply to
the new and rcplaoed
hard surfaces and the
Iand disturbed.
Minimum
Requirenrent #2
applies.
Figure 2.4.1 Flow Chart for New Development
Vofume I - Minimum Technical Requirenents - August 20 I 2
2-t0
F'act Shee