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HomeMy WebLinkAboutBLD2010-00180 e a y t ,,', • APPROVED .D, s " 1,-P-I---74© Cu 1 ev'''. STORMWATER PLAN � '�zr, , c JEFFERSON COUNTY AUG 9 2010 w' ,,4''\`„ `-3 DEPARTMENT 6 t-, , y,. ,� ENT OF COMMUNITY DEVELOPMENT JEFFERSON DEPT.OF C 621 Sheridan Street • Port Townsend • Washington 9836 SIGNATURE: ls, O 360/379-4450 • 360/379-4451 Fax '�"'�' � -��•••.r PIING httpa/www.co.jefferson.wa.us/commdevelopment/ STORMWATER SITE PLAN SUBMITTAL TEMPLATE MLA# 10 t~ \'SLA VirCLAC-C. � PROJECT/APPLICANT NAME: e5 i (jY i F t-' Poi 14. &r e Please answer all of the following questions to the best of your ability. Where the question calls for depiction on a site map, the applicant may choose to either incorporate the elements into the general plot plan for the Master Land Use Application or to submit a separate stormwater site plan map. Project Overview 1. Describe the proposed developed conditions of the site. Indicate position and relative size of proposed improvements on the site map. AS d-eve-1 c -I 5 i s w r U i Acl ude. a c rlc.is l4,-v c{ei ttc ; , r'n /e- 'Fanit rt t i (y 4d e�c.a.I � Gear� � A T>U, S c�,t-t� s I,, er1 ot...-o( -5ephc r�eser'r. are, , Vrtiovcke pArts al ` si•f-c. wi 11 r i-eLeA n,a(`i ve..•. velttatseve., Existing Conditions Summary 2. Describe the existing topography. Indicate contours on the site map. Pre? _✓t-i I s rc(a-i-i'v-e.( (curl,, will-, al`-. . rA la 64 <(aP,e- -f-ra) - -1i,-Q_ tof of ban .... ur +0-l< roaa.cA . -1-k., bq,,,.,-k Is bAs(callcy Vcr4-1cc I in,iktx aCA Lind. t i A Sem.it p lcte. -s l c'.- a-a `( -4'5 A. 3. Describe the existing vegetation. Indicate native vegetation areas on the site map. T-e whole sr c is -Kr ( ( )/.4-1, nafi'vc ►(urea-V/4M e c.ep1 WIeti-t. -f drivrway Pi A-6 isee'rt GI-ecwe I I . M AA.)ram. F,'rI /j[AR lock eear"/ aeta At ct.10-0^Cr r !0"—3 "0/: mele. w,..74 ot,... uctcle, s.7?0"7 o r SA la 1, Iv Id roc( ctii lot fj(�.c et-ete, -/- 0 fl..er IAlr4A.c 4. Describe the existing soils. Indicate soil type on the site map. uncle/bevsr 4, Sese�l /olc 1'nd/‘Calc a YCFf (a ,p.- o F or, st dv- t ave r a6o u t- 2y " 5oteid y /oq rn aver 5-ert'riJ fu ckar or_co i of in, '(cace.s/ w/fk_ rvo tui%k7 0.4,4 Gfrn-t.-fist-c)L-td So//is. bc_./A j -1-41 ocr, 5. Describe the existing site hydrology (i.e., drainage; behavior of water on the site—above, below, and on the ground). Indicate existing stormwater drainage to and from the site on the site map. Depict separate drainage basins on the site map, if applicable,and indicate acreage of each. , I 1' l4/ater 5 e�°'vf�-S Il o I/A lc e 4. t (y 1,,A ,.i _1a v l-ke 1 'p G?-cjr rc a"f S a; 1 r-c -4 i 4 "÷h- rG -,1) 5ea M1t° eYlrelt{ Tel ow 1 rtkote� ' er i/o 'c "ta -I'�.e. S kb re, ` r-r' i s . C..11n5'fzrw►-� Seep61e. nowt -f-t 9ta e exe A 6(46 4 '6. Describe any excess levels of noise generated by the proposed use or activity: /J s v c l C fhi e r 1 fit.a et '>/. tC4. / t J i de*,141 c ( v.5'0-le • stormwater site plan template-rev.10/21/2008 • • 7. Describe significant geographic features and critical areas (i.e., environmentally sensitive areas such as wetlands, streams, steep slopes, etc.)on the site. Indicate location on the site map. "Then' .l .F ta-1if/ SV a fer or- Cotf/ rr»S 11 Nvr'IR eel?/aAf5 or G ey aY- t l o v Cs'�r Q n rote '7"h.e.ba e r c ct ve rfi ca.( 4 t op IS'--2o ' dal 74 al' he tf.c_li 8. Describe the general vicinity of the site, including adjacent land uses and structures, utilities, roads, and sensitive/critical areas (streams,wetlands, lakes,steep slopes, etc.). sty/fC- i t i 'r vtd Jot Ave I/-d-eve/o peel Ta vr o -fault_ rioa b0,117 Po ) Ab f pfA�, The eceo 6cLivid 47 d / p/Dd 'et1 bor ' roct-S' , Ary 1 Socd-4 ocre exisi,,,c, 517 /e AaN *nu L.ccJed vf 30' back fr `Fe? ® f Permanent Stormwater Control Plan This portion of the Stormwater Site Plan consists of the selection and installation of the appropriate stormwater control BMPs and facilities to remain in place after construction of the project is completed. "Medium" size projects are required to have the totals calculated of all impervious surfaces, pollution-generating impervious surfaces, and pollution-generating pervious surfaces to verify that the thresholds for treatment facilities and flow control facilities are not exceeded. g. Describe the developed site hydrology, as proposed. Indicate whether stormwater will be fully dispersed (i.e., per BMP T5.30 in the Manual) or, if not,what types of stormwater flow control will be utilized for the site or specific threshold discharge areas within the site. Locate these facilities on the site plan and differentiate proposed facilities from existing facilities. r /� , 4G /t:�Uri A �✓(it, Wit=" d i vet ied 1f o r G'i'k ''C t'ir3t.,lrr, t r'. 1'11 I s' €fi 4 Z�r I1.5 iv tit be reMC ti cf Vf es per Fi j u 3,; 4tt v '',t4 ,w4,",u.4rr ma pivot, brrri,e Av a.,./,-(I4 fc hi/Lf - /n it 11i ok- S W&Jt kV/T h G 77 I v-J ,t.411 era te,e f ik) et fi ri. T7 e (A.itJc Dui ! fir. ith t:. i' . 7)f ,ci,,;10(,' r -Cr re v t'(' ' `s-rd i-i P 7 5.?c7. 10. If the project requires the use of stormwater treatment facilities, describe the types of stormwater treatment facilities proposed for use on the site. Locate these facilities on the site plan and differentiate proposed facilities from existing facilities. [This is normally for"large"projects or projects that involve the potential for dispersion of contaminants.] it/'-1 11. Describe the performance goals and standards applicable to the!project. / - (/" 4 I'>r+%rl.' c' �''t�L'..{'a .-r' E) ,' if(&/c S re;,, (/Ue1 I f C'/' 7''cv- p r 011 1 et/ st e.a ,r r a 'z} ' ec el r 4 G e .t -f c� tl?e.�`cc /,�'` 4vse/r,� /l oY-ri/,`,� e 17) 1) '-t vci, 'C r�." !^.�/Or In fro li i e/1 fo � f+r oc,:n ry R.f t'r �t.c�,c� -) ,Pr ev, ho/A, rr'e,1Nt r aGyly' -#-tss f1toti t["' ' r V+t .1(r F#.r�. 12. Describe tie flow control„system. // Cao xedvi elq. -fr7lt1_/ice r'S 7 7 c olr , ,r'5 • stormwater site plan template-rev.10/21/2008 6 • • • 13. Describe the water quality system. N !/%"` 14. Describe the conveyance system analysis and design. N /A 15. Describe the F source� of fill material, physical characteristics of fill material, and deposition of excess material.iIi< {M& eleti J Iv(t (..0145.1'... o fives-it oCuItr0704 nkli'r5-0" few owl- At tit c c^"' w/ S, sip 'c•. Th t S M.a..{ere kJ +leek /n eetAs e c'i Y e p rev/es us l y e%r-d -rep, srp i c �� .ale• , 16. Proposed methods of placement and compaction consistent with the applicable standards on Appendix Chapter 33 of the Uniform Building Code. 17. Describe the proposed surfacing material. 9v-ez yr 1 (? 7)r-ivr vie a y 18. Describe methods for restoration of the site. a44=d f"k,�J Jr I`"4:71I Pie./"?+Vt F i re, 0 i,v'lh`ig.o/ 6i.pea_S. b7oq c 6 6r'-cr, f Sit)!"-eq, R el c,/ / v 1� r e !J 4 1, '►.`+ 4�" �'t+t J1'G4s Fe, eler /1/011 " Iti (%; :r :4;t. /'4VASr'V'e" ('i 'c s. 19. An Operation and Maintenance Manual is required for each flow control and treatment facility. [This is normally required for "large"projects only and only those for which facilities are required to control flow or treat runoff.] If included, list the Manuals here. 20. List here and include any special reports or studies conducted to prepare the Stormwater Site Plan. 5,0/G -c Re. �aJ. 7- .461rltc , 20e,t3 SPA A f..Y r A f mri .,;Iyr 21. List other necessary permits and approvals as required by other regulatory agencies. If those permits or approvals include conditions that affect the drainage plan or contain more restrictive drainage-related requirements, describe those conditions or restrictions here. • SwoReL/tiFf • G,e-/T/ .4-4 A-re..,f4�' stormwater site plan template-rev.10/21/2008 7 • • CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN (SWPPP) The Construction SWPPP addresses sediment and erosion control during construction. The BMPs indicated by the applicant in the template that follows must be installed on the ground during all construction phases of the project. The proponent is responsible for preventing sediment and erosion impacts to environmentally sensitive areas and off-site areas. Consult the Construction Stormwater Pollution Prevention (SWPP) Best Management Practices (BMPs) Packet for guidance, particularly with rural residential development. SECTION I-CONSTRUCTION SWPPP NARRATIVE 1. Construction Stormwater Pollution Plan Elements. Describe how each of the Construction SWPPP elements has been or will be addressed. Identify the type and location of BMPs used to satisfy the required element. If an element is not applicable to the proposal,justify in writing. Descriptions of the 12 Elements are found at Volume II Section 3.2.3 of the Manual (beginning on page 3-7). 12 Required Elements-Construction SWPPP 1. Mark Clearing Limits. � Prior C`r)ri.$ 7`i� Cl)' /i.�1•' s o f a✓rat' 74 �c efeetrc w ►'14 low de/ieleaird i Styek'r a.s ( ,k1sf7r �er;ccikc; .per 13►tilPG(OS , .S�ioci�iil /301/4. 4.4-1 ; 4o-e ked Guy ft^ /0144f7'C FGv�ti. , Tres S 424_ p reTe.evef! Gtv'hi be e �jt✓ 1?>M/' C la/ tL Establish Construction Access. Cdk2 Sfrucf�ct�-� t -�t r� ec# AIL extJf,ic? c1r�vr&Ja.�� ("41 (d h< ei'ht 1 Su e d t r i a M P G o o<' 3. Control Flow Rates. it//, . 3/alb o.� 711../`5 c:/f t' / s TA A,.(/o w e o ti 4 -- 1-1,cc `" nafz,v .I {'y c..) ,~,ii(/ vcr`f 4. Install Sediment Controls. ,�6 d, 4.r 4:t v'..I ,{�(a 4 /-)x r'v f.'f p /' , /1--1 O L.'7 1.T'0 SGtc�.-l�'f �pu�.� (157 £-a� ((.I �I r rele7 e�' c r [-i� r ro r r.j a' C, o.b -o-vi '1/ ti e f / s�'"ITe+J'F t r ,r P 1 t(-e"i:l.+ nth 1 f t"c ,t,``$.t r, i? "e''�'a` o Y-_ 5. Stabilize Soils. .#. "l ,c'e sc+/, // be ro ar/ 4 �,;a�'�:-...�i° it' g'�6� kid/ � r� �r/ 7` t /3l:,c,sric 4,-)'Cf /./3/i� ' C-ld . 6. Protect Slopes. a,!:/, , ,le c/:'<cc 3 ; / o r Sc-Giber- 1 dcc ea cr'n S P; /J, GOVt c t U c1 i a1i r.9.a '7 o l i-le c a-a ,Sot r(Pf r4/K-C.. 7. Protect Drain Inlets. t.t°/A /1/o a�i��� i� ieif 0,1 Sife stormwater site plan template—rev.10/21/2008 8 • • 12 Required Elements— Construction SWPPP(continued) 8. Stabilize Channels and Outlets. , 9. Control Pollutants. 1 1 f-'4 t 3/�bf4;4/5 /Av Id c'a7!4Y0/ted ,SDvte-e,, J ✓v ,de NL a,'n'(c'1 a 1 C e i-v r'll 1c d t to _cn ' t1 e. Can c—e fe va_ cira4I;1c0 will bc dew 51, 1 A- ovAstc_wa.1et drn tea( .sf&v i/1 S'I.1f'. per r3MP G /5/ 10. Control De-Waering(the act of pumping groundwater or stormwater away from an active construction site). G XCG r A.-ti ct.i Cie-+va fef�� i r nerd ed iv,'l l d r'sp errs e w .:1 r ar► s- 0 w ec F•'17L-e th/D u'IA K t-1)& S O I( f i•e-yefit.htln. , 11. Maintain Best Management Practices(BMPs). CAW"rfliCl7'Old eel 75 Atre:'.e, 5/vat—v. k. rt /te s f+'e -ec.A:t5 r c,. a( caysh d?' , `,nit I f f e#1 c rAQ w/i/ 14-r e tiv o't /1-1 et 1et71124ited APM nv,an t I 1a As-7 . 7 ►'41 P`r b Yr ei na /i f er 3a c 1& r. k-.I e 1�'�,., 6 FeAts-frefel-lehk pei je crs 12. Manage he Project. vra(e a-),t L r>j• air/ Cr715'k-e,c-94e� S c-t t,e-cto/e. 2. Adjacent Areas. a. Description of the adjacent areas that may be affected by site disturbance (e.g., streams, lakes, wetlands, residential areas, roads). M -f-hc /o Pv c( e. ,0 rape s Q Vcr17 e. S macs' y%.v AAA-k- ris c�hoQf (G. ' 'c9(ow - a a rocks/ beach. All r-ur1e{r w, l( b.( 't./f t°re. 1 ' e (/4 r etckrx #b& heA.c. by iil '(t✓-e>L;i a cart 14'1 f'�rtt�7t�r-t "tta —0\ ,be dt.a(r f r E a sesJ b. Description of the downstream drainage path leading from'fhe site to the receiving body of water(minimum distance of 400 yards). iJo cira t&c lc (pa.7' , qro vA of 5 1'r� Iv le v. ( l c hrKVi (y Velefs`1'e�c L9± _ �i .. 3. Environmentally Sensitive Areas. a. Description of environmentally sensitive areas that are on or adjacent to the site. Tvx#- ,the 1)c'acot (isee 2' et vr 4 stormwater site plan template—rev.10/21/2008 9 • • b. Description of special requirements for working in or near environmentally sensitive areas. Ali Ccrov-,uc. i'ark a :t vr'tfeS t w .f-et rvitocr 6u%ff 4. Erosion Problem Areas. Description of potential erosion problems on site in the context of the characteristics of the on-site soils (e.g.,erodibility,settleability, permeability, depth, texture, soil structure). I`I, A No slo e S c€p f 17 o u G. fro pore fr c:)510,1 pea f eAt* 5. Construction Phasing. a. Construction sequence (I) S t2 (2) 6 arcq e (3)(Fvhii e) A D Q. b. Construction phasingsir (if proposed) ( // N c cj eci e C 'f"tn.t e v.-awe Cfavt 51-vu c "iov a, A -t-u 'Life 6. Construction Schedule. Wet season is October 1 through April 30(page 2-21 of the Manual). Provide a proposed construction schedule. Scpf cry.brr tot') q rad,t'Ae 7vv✓t rl a Ct s- IJQVr.44ciac,Ate Zo/o — TUnt 'Zoe/ r A- 1,,i efrtz o t',1.7 II. Wet Season Construction Activities. a. Proposed wet season construction activities. fa..dvt erkm en Sf.^4 •FYUcfuc C b. Proposed wet season construction activities for environmentally sensitive areas. /v f A 7. Financial/Ownership Responsibilities. a. Identify the property owner responsible for the initiation of bonds and/or other financial securities. Z. u reeri.C-C. 6%o-Al:ter"5 b. Describe bonds and/or other evidence of financial responsibility for liability associated with erosion and sedimentation impacts. 1 Pi A 8. Engineering Calculations. Provide Design Calculations on a separate sheet for the following, if applicable. a. Sediment Ponds/Traps. /V/4 b. Diversions. tU //� c. Waterways. / d. Runoff/Stormwater Detention Calculations // f stormwater site plan template—rev.10/21/2008 10 l • . SECTION II—EROSION AND SEDIMENT CONTROL PLAN Sediment and erosion control measures may be depicted on the master land use application plot plan, a stormwater site plan, and/or a separate Construction SWPPP site plan. This is a checklist to ensure that the following are depicted on a site plan: 1. General. a. Vicinity Map b. Jefferson County Approval Block c. Erosion and Sediment Control Notes 2. Site Plan. a. Legal description of subject property. b. North arrow. c. Indicate boundaries of existing vegetation (e.g.,tree lines, pasture areas, etc.). d. Identify and label areas of potential erosion problems. e. Identify FEMA base flood boundaries and Shoreline Management boundaries (if applicable). f. Show existing and proposed contours. g. Indicate drainage basins and direction of flow for individual drainage areas. h. Label final grade contours and identify developed condition drainage basins. i. Delineate areas that are to be cleared and graded. j. Show all cut and fill slopes indicating top and bottom of slope catch lines. 3. Conveyance Systems. a. Designate locations for swales, interceptor trenches, or ditches. b. Show all temporary and permanent drainage pipes, ditches, or cut-off trenches required for erosion &sediment control. c. Provide minimum slope and cover for all temporary pipes or call out pipe inverts. d. Shows grades, dimensions, and direction of flow in all ditches, swales, culverts and pipes. e. Provide details for bypassing off-site runoff around disturbed areas. f. Indicate locations and outlets of any dewatering systems. 4. Location of Detention Best Management Practices (BMPs). Identify location of detention BMPs. 5. Erosion and Sediment Control Facilities. a. Show the locations of sediment trap(s), pond(s), pipes and structures. b. Dimension pond berm widths and inside and outside pond slopes. c. Indicate the trap/pond storage required and the depth, length,and width dimensions. d. Provide typical section views through pond and outlet structure. e. Provide typical details of gravel cone and standpipe, and/or other filtering devices. f. Detail stabilization techniques for outlet/inlet. g. Detail control/restrictor device location and details. h. Specify mulch and/or recommended cover of berms and slopes. i. Provide rock specifications and detail for rock check dam(s), if applicable. j. Specify spacing for rock check dams as required. k. Provide front and side sections of typical rock check dams. I. Indicate the locations and provide details and specifications for silt fabric. m. Locate the construction entrance and provide a detail. 6. Detailed Drawings. Any structural practices used that are not referenced in the Ecology Manual should be explained and illustrated with detailed drawings. 7. Other Pollutant BMPs. Indicate on the site plan the locations of BMPs to be used for the control of pollutants other than sediment(e.g., concrete wash water). 8. Monitoring Locations. Indicate on the site plan the water quality sampling locations to be used for monitoring water quality on the construction site. Sampling stations should be located upstream and downstream of the project site. stormwater site plan template—rev.10/21/2008 11 • • Stormwater Site Plan Changes If the designer wishes to make changes or revisions to the originally approved Stormwater Site Plan, the proposed revisions shall be submitted to DCD prior to construction. The submittal shall include substitute pages that include all proposed changes, revised drawings showing any structural changes, and any other supporting information that explains and supports the reason for the change. Final Corrected Plan Submittal If the project included construction of conveyance systems, treatment facilities, flow control facilities, or structural source control BMPs (not standard on-site stormwater management BMPs), the applicant shall submit a final corrected plan ("as-builts") when the project is completed. These should be engineering drawings (stamped by a licensed civil engineer) that accurately represent the project as constructed. APPLICANT SIGNATURE By signing the Construction SWPPP 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 oft affected property. 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