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HomeMy WebLinkAboutStormwater Report MLA16-00048STORMWATER REPORT WILKINS PROPERTY TIMBERLAND TO COMMERCIAL PROJECT APN 921092 007 GYBE HO ROAD NORDLAND, WA 98368 EXP. DATE: 05 / 05 / 18 Prepared by Michael J. Anderson PE do PLS No. 27665 330 Cleveland Street Port Townsend, WA 908368 MAY 2 5 2016 _ pr. f�F o� ..CUUNry STORMWATER REPORT WILKINS PROPERTY TIMBERLAND TO COMMERCIAL PROJECT PROJECT LOCATION The project is located on Marrowstone Island Northeasterly of the intersection of SR 116 (aka Fort Flagler Road) and Robbins road in Section 9, T29N, R1E, W.M. The site is a 5 acre parcel know as APN 921 092 007 located on Gybe Ho Road, easterly of SR 116 V2 mile. This stormwater management plan will examine the hydrology and changes to the stormwater runoff due to the addition of the proposed on -site building construction. All proposed drainage improvements shall be consistent with the design standards of the Jefferson County Development Standards and the "Stormwater Management Manual for Western Washington" 2012 (DOE SMMWW). PRE -DEVELOPMENT SITE CONDITIONS The access driveway to the present project is an unpaved gravel roadway extending easterly as noted from SR 116. The site is covered by native trees and vegetation. Minor timber removal was done in 2014 in preparation of a single family residence and there was an exploratory septic system investigation. Presently, there is only the gravel roadway entering at the middle of the site consisting of 1732 sft The existing site currently sheet flows westerly and southerly and is characterized as "flat". Please see Jefferson County printouts from the County website showing the contours. Utilizing the "USDA Soil Conservation Service — Jefferson County Area" as a resource, the soil is characterized as Whidbey (WhC) gravelly sandy loam. The infiltration rate for this type soil varies from 2.0 to 6 inches per hour. In August, 2015, a "Wetland Delineation Report" was prepared by Ecological Land Services, Inc. for the site together with a "Draft Wetland and Buffer Restoration Plan". These documents have been used to prepare this stormwater report. Page 2 of 6 DOWNSTREAM ANALYSIS The downstream storm drain system is not clearly defined. The existing gravel road system does have a roadside ditch system but the road drainage pattern is not clearly defined. PROPOSED SITE DEVELOPMENT The project consists of the removal of a portion of the timberland to create a farm to produce Cannabis Sativa (marijuana) plants for commercial use. The land clearino, will address the noted wetland and wetland buffer requirements and comply with the recommendations of the reports. The only new construction will consist of fencing in accor ante wi as angton. State regulations and the installation of a new driveway along the north portion of the site to facilitate access around the wetland area. No additional improvements are proposed. '.4 9(-^vAc o"-" PROPOSED STORMWATER IMPROVEMENTS The primary goal of the State DOE Stormwater Manual for Western Washington is to protect the streams of the State and the Puget Sound. To comply with that goal, the Manual prescribes the treatment of runoff and the infiltration of the treated runoff into the soil to refurbish the ground water that the impervious areas have covered. The on -site design now provides for sheet flow dispersion in accordance with BMP T5.12 of the State SVRAN4WW by pr vi zng a 50 foot wide undisturbed buffer. The buffer will provide the dispersal to the sheet flow to simulate current conditions. HYDROLOGICAL ANALYSIS The following is a summary of the impervious areas: (see site plan attached) EXISTING PROPERTY SITE AREA: EXISTING GRAVEL DRIVEWAYS....... 1732 SFT TOTAL IMPERVIOUS AREA .................. 1732 SFT Page 3 of 6 5.210 Ac 0.0398 Ac 0.0398 Ac PROPOSED DEVELOPMENT: TOTAL GRAVEL DRIVEWAYS ............... 5020 SFT = 0.115 Ac CLEARED TIMBER AREA ........:...... 31800 SFT 0.730 Ac 2- - 1 � I TOTAL IMPERVIOUS AREA ......... 5020 SFT = 0.115 Ac 7h`? (`r (In, oo«~74000 PROPOSED STORMWATER FACILITIES Utilizing the User Manual for the WWIIl B program, the option of a gravel trench was selected and a length of 10 feet was determined to be sufficient. See attached calculations. The gravel driveway will be graded to slope to one side into a ditch. The final 50 feet of ditch will be constructed as a bioswale per the detail shown on the plans and connected to a catch basin at the infiltration trench. 7">j :a '.") Gt t, I�r• ji.. EROSION AND SEDIMENTATION IMPACTS The State 2012 DOE SWMMWW Manual specifies that each stormwater plan shall provide for the following elements: SECTION 2.5.1 MINIMUM REQUIREMENT #1 : PREPARATION OF STORMWATER STTF. PT.�N Please see attached on-site/stormwater plan for the site TESC plan details. SECTION 2.5.2t. MINIMUM #2 :)CONSTRUCTION STORMWATER POLLUTION PREVENTION (SWPP)- Please see attached Figure 2.4.1 - FLOW CHART FOR DETERMINING REQUIREMENTS FOR NEW DEVELOPMENT j All new development and redevelopment shall coj wX'h Construction SWPP Elements #1 through #5 below:. Element 1: Mark Clearing Limits 1 �. oo(-� . The clearing limits are as shown on the attached Stormwater Site Plan and the setback line to the existing wetland buffers have been located in the field as shown.No additional clearing is proposed. Page 4 of 6 Element 2: Establish Construction Access A construction access will be established at the existing gravel driveway. The installation of quarry spalls to minimize tracking sediments will be utilized as shown on the attached detail sheet as necessary. Element 3: Control Flow Rates The downstream condition will not be materially affected by the increase in runoff due to the proposed development. The storm water is be dispersed on -site. Element 4: Install Sediment Controls A silt �l to the fence will be set in place along the area along EFTowns re un ary start of anv construction to nrPVPnt- Element 5: Stabilize Soils perimeter of the of the site prior ltation. At the completion of the clearing of the site, the areas disturbed by clearing and not included in the growing area, will be seeded and maintained to stabilize the soils. As required by the SMM, from October 1 through April 30, no soils shall remain exposed and unworked for more than 2 days. From May 1 to September 30, no soils shall remain exposed and unworked for more than 7 days. The soils will be temporary seeded or protected with plastic covering. SECTION 2.5.3 MINIMUM REQUIREMENT #3: SOURCE CONTROL OF POLLUTION This report and plan is consistent with the intent of the SMM to prevent stormwater from coming in contact with pollutants. As discussed above in the Elements, considerations have been employed with respect to the equi-pment--on, -the-s-ite--duri-ng-crostructlon to prevent f po utants entering the stormwater sys em. -� SECTION 2. 5. 4 MINIMUM REQUIREMENT #4: PRESERVATION OF NATURAL DRAINAGE SYSTEMS AND OUTFALLS There are no natural drainage systems other than sheet flow Page 5 of 6 across this property. The stormwater flows from the pavement areas will be captured on -site. SECTION 2. 5. 5 MINIMUM REQUIRE ,1ENT #5 : ON -SITE STORMWATER MANAGEMENT The SMM principle goal is to infiltrate where possible. This plan has incorporated infiltration as a part of the storm water system by irrigating the rear portion of the site which is covered by natural vegetation. SUMMARY In summary, the stormwater requirements are as shown on the attached copy of the engineered site plan illustrate the stormwater facilities proposed for the project that will comply with the Washington State Department of Ecology standards. TEMPORARY EROSION AND SEDIMENT CONTROL The silt fences will be placed along the site as shown to provide erosion control during construction and remain in place to disperse the sheet flow storm water. Landscaping of all exposed so WHI Fe—co—m—pFet—edas soon as posse a to preven any offsite soil deposition. Page 6 of 6 ATTACHMENT I PLANS I w N N N O ri 005 00 PT 185 r . STORMWATER SITE PLAN — AVERAGE SETBACK TO PROPERTY LINE AS STAKED IN THE FIELD S 88°05'53" E 665.51 ' 50 FT SETBACK INSTALL CHAIN LINK - FENCING/PLASTIC SCREENING (TYPICAL) roa. PT 3 1/2" DIA, GALVAN POST/ 8 FT HIGH -- @ 8 FT SPACING (TYPICAL) CHAIN LINK FENCING/ PLASTIC SCREENING (TYPICAL) 24" DIA. X 42" PCC Sy -? A - —CLEARED LIM]�TS OF \f❑RK AS OF MAY 2 , 2016 30' OFFSITE DRWY E GATE, PROPOSED lO' ORAVEL 1`n PEDESTRIAN GA 1 50 FT SETBACK PEDESTRIAN FLOW N 88°03'45" W 665.55' SECURITY FENCE 51 GRAVEL D/W EDGE 3i ►�� CLEARING mp) S3 C° O 157 FT N O cn S4 .0 00 PT 0 ­-ICD 0i 0" 0 0 0'� v •o STORMWATER NOTES: SINSTALL SILT FENCE--�r�--���-- 52 CONSTRUCT SWALE.... L=50 FT S2 S3 CONSTRUCT 18" INFILTRATION TRENCH/4" PIPE L = 10 FT PER DETAIL SHEET 2 54 CONSTRUCT 24" CATCH BASIN REMOVE CULVERT (CB 30 ) LEGAL DESCRIPTION: THE NORTH ONE/QUARTER OF THE SOUTHWEST ONE/QUARTER OF THE SOUTHWEST ONE/QUARTER OF THE NORTHWEST ONE/QUARTER OF SECTION 9, TOWNSHIP 29 NORTH, RANGE 1 WEST, WILLIAMETTE MERIDIAN. APN 921 092 007 SITE AREA = 5.21 Ac. PROPERTY OWNER: TIM WILKINS 10953 MADISON BAINBRIDGE ISLAND, WAS 98110-3348 STRUCTURAL NOTES: WIND LOADING PER 1502 110 MPH T' IMPERVIOUS AREA: EX, GRAVEL ROAD........ 1200 SFT NEW GRAVEL ROAD..... 3820 SFT IMPERVIOUS AREA....; 5020 SFT CLEARED' AREA ........... - 31800 SF 0.730 AC = 14.01%-- i MAY 2 g 206 y EXP. DATE: 05 / 05 / 18 ANDERSON� CIVIL ENGINEERS & SURVEYORS PORT TO WNSEND, WA 9836 (360) 531-1011 ,APRIL 21, 2015 Page 1 of 2 REV. 41 MAY 24, 2016 1"= 4 f t FRAME AND OPEN GRATE 2"x4"x8" SOLID BRIC USED FOR FINAL ADJUSTMENT TO GRADE. 6" HIGH MAX 6" OR 12" CONCRETE RISER SECTION CLASS 4000 CONC PRECAST CONC BASE W/MAX OF ONE 17"0 KNOC TYPE 30 CATCH BASIN 6" MINIMUM ILEVEL 4"" tO b - UUAKKY 5PALL5 EDGE SECURITY MIRAFI 100 NS OR EQUIVALENT FILTER FABRIC MATERIAL ROWS _ v RUNOFF WATER \ WITH SEDIMENT PROVIDE FULL WIDTH OF INGRESS/EGRESS AREA CONSTRUCTION ENTRANCE uo NATIVE GRASSES PER STATE ST❑RMWATER MANUAL PAVEMENT BASIC BIOFILTRATION SWALE Ins 6" COMPOST AMENDED S❑IL SEE BMP T9.10 SWMMWW NATIVE GRASS 4" PERFORATED PIPE 2 18" DEF INSTALL Cl GRAVEL IN (REF: FIG, 312, VOL III, SWMMWW) 20' BURIED FILTER NOTE: FABRIC SAND BAGS MAY BE USED IN PLACE OF FILTER FENCE WHEN FILTER FABRIC IS IMPRACTICAL. 50' TYPICAL DISPERSED FLOW SILT FENCE DETAIL (FIG. 4.2.12) INFILTRATION TRENCH ns PL owr 2 3 ° Pr 0'- 'viv �UNITy� 1 y p£ IQPAAY ulfM, +ELI mom ATTACHMENT II CALCULATIONS fb Edt V1. Ilxb ❑ GO, 9 � n In I Irmo 0-tim 1 IMES V V E Subbasin Name Oem t +�•��+•e:C+.: ! Surleee InlmOew Gmundwelm �I • Mlisaled •lillh 7 Flows To: F 0 0 Area in Basin r Show Orlyeaed Sd ___Run Scenena J Avnllablo pamio is Availutrlo Im BNia pp�l��Fururc — F __ .gab u 52l F- r- � F S FIk 0 a —] D r A/B Potal,Sleep Il F- 0 r AM, Faaua.5leen r AYS o D r ,L�uw� 0 r Dfll A TEEP 0 'a� + r_ _, l_a.xLNou 0 r I ALKS/FIAT p f— .Sewn xay 0 r SI EW D p L� i . 7eARr r SI ALKB/STEEP F PAAI:pIG 1 r i— . a sleep D I' Pe�iva. r hi t-.. ollva M 0 r � p r anus Sl Mwa Elenwnl: Jr PerviousTold Aaex hpwvipus Taal Aoes B".Told 5.21 A..S ewxy] Load xyj +� .� 5 J DLEDJosekG Zero Select BY.r— GO I V 110:44 PM INN art Ql"III —II wmd - -; v:vm,e jBHIOU`srdf Ad plosi - ■ rr E]Wrod,4 l,rvJ De -<,QVVP:= i—IN 2:/3 �E& VWwHdp ❑9;12 F07 9 � ;!t. ramtu11a 1 Subbasin Name Barrel r DaiyatauBypamloi POC or Ndewlooed — Sudasa InlarRan srauad raga �.I. Flows To: ErmlTreatr@edT avd irprreh@eAl 0 M Miligaled Area in basin r Show O*Sdeded Nun Available Pervious Availablle)m nm'oua FI FMFNT_" !._... � '.� h�B. oros.Fln - r -- .r . amn, od r ®�®ram_ I D �Il��® -- ae, m1ua,Fla an r sal v I r A/B.Pmlrra, D � - NNEWA'lS/FInT_ DlrS OE E_ r ,' axL Fld r Ski p {j 11 r .rar,rssiaop o r �"� I � 1 r Pnnae tier I" _ Ic r 15 0 r A P.M—Io—,� Move Elencenrs --- F- Jr� o hi 5.095 nne Impervinre Tdd 0.115 Aram Bain Told A.- lara.y' I.wdarE �, e Deaeledzmo I select By.r GD__j _ t t r Si812 Q wbE Ho P Q oai w:o ©Mcl-rear ' vnaHn; � i+iao=1• v / � trne r � - 0 P< nare P I& I 1UEdt Vx. ekp _ Facility Name Ifxwd Ttrch Pads r Pndereiyed {I — Outlet I Outlet 2 Outlet 3 I OF+M__ _ __ Downstream Connection B itiymed 1f Faciliy Type Grsrslirenchr8ed I Run5eeeurae 1 I- RacmiemAppted to Faulty OuickTrench I El EUEUMS r vrpaemnarpiadtp: Facility Bottom Elevation(fill) jo ®�® Facility Dimensions rcy r—�®may Timch Length 19 Outlet Structure renc ��®®JJ IL��I 11llLlr[C•r�`I�11l1 I Th Bdlom�Ydlh x Rirm Heiph111Q 21 Elladiro Trial Depth Z FlewD'waderlol Ig iif✓� Bdlam elope d Trerrch t Blue Type Fld =� 'Len Sicle Slope t Notch Type {J ! 'Right Side Slow t J-- •.t Material Layers for 'Layerl Thick—(0) 5 Orifice Diameter Height OMax 4 'Leym 1 pmoay lay Numher (1n) (Ft) (cfs) 'L�ar2Tlidmea jlil p'J 7 �O ����� J B f ILajw2po=4 33 2 -H —B ILeya 3Tlick—lkl 5 3 �'] �'d D 1 _ _ _ ILeya 3 penalty 3] I S Trench Vok—at Ri-11-dlaa0 M) .00 Mora Ekarnh v (Infiltration C 1 0.6 Pand lnuament INeanaed ....ton Rda eJM —1 E^'-3 fNdretian Reduction Fedor Show Pond Tahle Byars Tah6 -I timWOW Seraeaaeetee—It) ES -J 'rdaivoeoehaftata4eci0) 0.163 TddvokmeTluoueh FadRAa m4tj 0.163 areayl Laed xy 110410 Vok< irapt ALw4 41 0 P.—I lNi0eled 100 16fall 11 0 / © 0 Rrl i; I MER, ENVPA- �Nutodsl Landry= 1c Interscln I f I1F RUI' 11—!,F.,Ik, ATTACHMENT III REFERENCES Start Here Does the site have 35% or more of Yes See Redevelopment existing impervious — - Minimum Requirements and coverage? Flow Chart No Does the project convert I (Figure 3.3) % acres or more of Does the project vegetation to lawn or result in 5,000 landscaped areas, or square feet, or No convert 2.5 acres or more greater, of new plus of native vegetation to replaced hard pasture? surface area? Does the project Yes Yes No result in 2,000 square feet, or greater, of All Minimum new plus replaced Requirements apply hard surface area? to the new and replaced hard surfaces and converted Yes No vegetation areas. Minimum Requirements Does the project have #1 through #5 apply to land disturbing the new and replaced activities of 7,000 JYes hard surfaces and the land disturbed. square feet or greater? No Minimum Requirement #2 applies. Figure 2.4.1 — Flow Chart for Determining Requirements for New Development Volume I —Minimum Technical Requirements —August 2012 2-10 BMP T5.12: Sheet Flow Dispersion Purpose and Sheet flow dispersion is the simplest method of runoff control. This BMP Definition can be used for any impervious or pervious surface that is graded to avoid concentrating flows ). Because flows are already dispersed as they leave the surface, they need only traverse a narrow band of adjacent vegetation for effective attenuation and treatment. Applications and Use this BMP for flat or moderately sloping (< 15% slope) surfaces such Limitations as driveways, sports courts, patios, roofs without gutters, lawns, pastures; or any situation where concentration of flows can be avoided. Design . See Figure 5.3.2 for details for driveways. Guidelines Provide a 2-foot-wide transition zone to discourage channeling between the edge of the impervious surface (or building eaves) and the downslope vegetation. This transition zone may consist of an extension of subgrade material (crushed rock), modular pavement, drain rock, or other material acceptable to the Local Plan Approval Authority. Provide a 10-foot-wide vegetated buffer for up to 20 feet of width of paved or impervious surface. Provide an additional 10 feet of vegetated buffer width for each additional 20 feet of impervious surface width or fraction thereof. (For example, if a driveway is 30 feet wide and 60 feet long provide a 20-foot wide by 60-foot long vegetated buffer, with a 2466t by 60-foot transition zone.) ■ No erosion or flooding of downstream properties may result. • Runoff discharge toward landslide hazard areas must be evaluated by a geotechnical engineer or a qualified geologist. Do not allow sheet flow on or above slopes greater than 20%, or above erosion hazard areas, without evaluation by a geotechnical engineer or qualified geologist and approval by the Local Plan Approval Authority. • For sites with septic systems, the discharge area must be ten feet downgradient of the drainfield primary and reserve areas (WAC 246- 272A0210). A Local Plan Approval Authority may waive this requirement if site topography clearly prohibits flows from intersecting the drainfield. Runoff Modeling Where BMP T5.12 is used to disperse runoff into an undisturbed native landscape area or an area that meets BMP T5. 13, and the vegetated flow path is 50 feet or more, the impervious area may be modeled as landscaped area. Where the vegetated flowpath is 25 to 50 feet, use of a dispersion trench (see BMP T5.1 OB) allows modeling the impervious area as 50% impervious150% landscape. This is done in the WWf M3 on the Mitigation Scenario screen by entering the dispersed impervious area Volume V — Runoff Treatment BMPs — December 2014 5-6 dispersion of roadway runoff may not be allowed, or other measures may be required. • Cleared Area Dispersion BMPs The runoff from cleared areas that are comprised of bare soil, non- native landscaping, lawn, and/or pasture of up to 25 feet in flow path length can be considered to be "fully dispersed" if it is dispersed through at least 25 feet of native vegetation in accordance with the following criteria: The topography of the non-native pervious surface must be such that runoff will not concentrate prior to discharge to the dispersal area. 2. Slopes within the dispersal area should be no steeper than 15%. If the width of the non-native pervious surface is greater than 25 feet, the vegetated flowpath segment must be extended 1 foot for every 3 feet of width beyond 25 feet up to a maximum width of 250 feet. Minimum Design Requirements for Public Road Projects Applicability: These criteria apply to the construction of public roads not within the context of residential, commercial, or industrial site development. They will likely only be implementable on roads outside of the urban growth areas where roadside areas are not planned for urban density development. 1) Uncollected or natural dispersion into ad'acent ve etated areas (i.e., sheet flow into the dispersion area) Full dispersion credit (i.e., no other treatment or flow control required) for sites that meet the following criteria: a) Outwash soils (Type A — sands and sandy gravels, possibly some Type B — loamy sands) that have an initial saturated hydraulic conductivity rate of 4 inches per hour or greater. The saturated hydraulic conductivity must be based on a Pilot Infiltration Test or the Soil Grain Size Analysis method as identified in Section 3 of Volume III, or another method as allowed by the local government. Up to 20 feet of impervious flow path needs 10 feet of dispersion area width. Each additional foot of impervious flow path needs 0.25 feet of dispersion area width. b) Other soils: (Types C and D and some Type B not meeting the criterion in la above) ■ Dispersion area must have 6.5 feet of width for every 1 foot width of impervious area draining to it. A minimum distance of 100 feet is necessary. Volume V— Runoff Treatment BMPs — December 2014 5-37 Wetland Delineation Report for the Gybe Ho Property Nordland, Washington Prepared for: Tim Wilkins 10953 Madison Avenue Bainbridge Island, WA 98110 (360) 380-7345 Prepared by: Ecological Land Services, Inc. 1157 3rd Avenue, Suite 220A Longview, WA 98632 (360) 578-1371 Project Number 2281.01 August 2015 Draft Wetland and Buffer Restoration Plan for the Gybe Ho Road Property Jefferson County, Washington Prepared For: Tim Wilkins 10953 Madison Avenue Bainbridge Island, Washington 98110 (206) 380-7345 Prepared By: Ecological Land Services, Inc. 1157 Yd Avenue, Suite 220A Longview, Washington 98632 (360) 578-1371 ELS Project 2281.01 December 2015 iviap uutput &X H/0 / 7- A " Page 1 of 1 ArcIMS HTML Viewer Map ,M421OlI W030 921092014 922029 ....... C� Q q;n0sto1r, a2 YMY,9 4 7W202 -0 Legend Selected Features ry Towns C3 Rawad CwAom Cl- -21C 42108$028 JC Roads Parcels-H, P Contours W10920� I 92108100 "V, 1OFootCofflow Ho 1W Mq-M;rCN;dCd by �esvzcxl ca-req ctrwff samwxes Go j"11 FOR INFORMATIONAL PURPOSES ONLY - Jefferson County does not attest to the accuracy of the data contained herein and makes no warranty with respect to its correctness or validity- Data contained in this map is limited by the method and accuracy of its collection. Mon May 23 20:53:50 2016 http://maps.co.jefferson-wa.uslservleticom.esri.esrimap.Esrimap?ServiceName=ovmap&CI... 5/23/2016 lviap output J�Fwta;l "5 ' Page 1 of 1 ArcIMS HTML Viewer Ma I — 1 925055016 7 �� ran i i •�", i(j 923 V 20A! I o250l1'A11 � ` t r Legend �fqI JC Roads �� I 9LSffa21J61 5 .l 5q,1p�•.Q. �� r Paruls-H fContours L r I) e 1 a 560 r% I 7 � ~ I -1 la Foal comuur jjj 9210a1e26 _ - 44 c ' 166 I 1 I VAIswcar 921W1Of5 ��� '1 1 t _ •� _ . _ -_ _ _ rti GYCs Ha Rd—.._._— - - 921093W1 u...uwwlWalkamfw+~Y4ex.ae[wW I I iS0 I .. --._ .I I FOR INFORMATIONAL PURPOSES ONLY - Jefferson County does not attest to the accuracy of the data contained herein and makes no warranty with respect to its correctness or validity. Data contained in this map is limited by the melirod and axuraC of iia call.ctian. ManMay 23 21:05:24 2d16 http://maps.co.j efferson-wa.uslservletleom.esri.esrimap.Esrimap?ServiceName=ovmap&CI... 5/23/2016 Michael From: Sant, Fran (ECY) <fsan461@ECY.WA.GOV> Sent: Wednesday, May 18, 2016 11:31 AM To: Michael Subject: RE: SEPA CHECKLIST Hi Michael, Thanks so much for contacting me. I apologize for the delayed response. I have been out the last couple of days recovering from an oral surgery. Often times there is some confusion around the clearing and grading categorical exemption in WAC 197-11-800. Ecology attempted to clarify this in our rulemaking in 2014 by adding additional the highlighted information into the exemption below: (v) Any fill or excavation of 100 cubic yards throughout the total lifetime of the fill or excavation and any excavation, fill or grading necessary for an exempt project in (i), (ii), (iii), or (iv) of this subsection shall be exempt. If your project is exempt from SEPA then the volume of the clear and grading is exempt even if it exceeds the local jurisdiction minor new construction threshold because the activity is associated with an exempt project. SEPA is intended to be implemented at the local level. You are already working with Port Townsend to determine the type of project and if SEPA is required. I would recommend that you make sure are defining the total proposal. I am assuming there is more going on than just clearing and grading — any new construction? Sorry again for the delated reply and please let me know if you have any further questions. Thanks and have a great day. Fran Sant Department of Ecology SEPA Technical Assistance/Rule Coordinator 360.407.6004 From: Michael [mailto:santiago2@ abiespeed,coml Sent: Thursday, May 12, 2016 2:18 PM To: Sant, Fran (ECY) <fsan461@ECY.WA.GOV> Subject: SEPA CHECKLIST Hello, This is Michael Anderson in Port Townsend, the local civil engineer/land surveyor, who because of my position in the community is frequently involved in permitting for all kinds of projects. I have long time had questions regarding the SEPA checklist, in particular," B. Earth", and the question pertaining to e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. MICHAEL J. ANDERSON Civil Engineer a, Land Surveyer 330 Cleveland Street Port Townsend, WA 98368 MEMO DATE: May 24, 2016 TO: Jefferson County Community Development Department Planning Department: Mr. Joel Peterson FROM: Michael J. Anderson PE & PLS SUBJECT: BLD15-00143 GYBE HO ROAD: APN 921 092 007 WILKINS APPLICATION Attached is a copy of the Stormwater Report prepared for the clearing of the subject site prepared in accordance with the State of Washington DOE SWMMWW. The report is being submitted as requested pursuant to your meetings with Mr. Wilkins and his manager Mr. CJ Riley. Thank you for your assistance with this project. Please indicate if you need any additional information at this time. c: Tim Wilkins, Owner CJ Riley,Project Manager #AY 2 5 2016 JEFFERSON COUNTY STORMWATER SITE PLAN AVERAGE SETBACK TO PROPERTY LINE AS STAKED IN THE FIELD S 88°05'53" E 665.51 ' 105 0.00 50 FT SETBACK PT slat tli SL3 { 185 FT W INSTALL CHAIN LINK N FENCING/PLASTIC SCREENING (TYPICAL) f -� `t N PEDESTRIAN GATE N O Z y- m 108 PT 3 1/2" DIA. GALVA POST/ 8 FT HIGH @ 8 FT SPACING (TYPICAL) CHAIN LINK FENCINI PLASTIC SCREENING (TYPICAL) 24" DIA. X 42" PC 50 FT SETBACK N 88°03'45" W SECURITY FENCE 1"= 4 Ft S1 665.55' CLEARED I TM11TS OF 1 ORK AS OF MA, 3, 2016 30' OFFSRE DRWY EASENENT— GATE. .& PROPOSED 10' GRAVEL D/WW t� 10 i EDGE CLEARING (n'P) F O 157 FT '-;4- a. GRAVEL (� D/W O STORMWATER NOTES: Sl INSTALL SILT FENCE 107 OPT O --I O m 0 r- 0 ROAD EXP. DATE: 05 / 05 / 1© i FrAl nFlz',rRIPTION: THE NORTH ONE/QUARTER OF THE SOUTHWEST ONE/QUARTER OF THE SOUTHWEST ONE/QUARTER OF THE NORTHWEST ONE/QUARTER OF SECTION 9, TOWNSHIP 29 NORTH, RANGE 1 WEST, WILLIAMETTE MERIDIAN. 7 1 Ac. DWNER: ID, WAS 98110-3348 NOTES: R 1502 swe"ll �........ 1200 SFT D..... 3820 5FT 31195 S-F = 0.116- AC e ANDERSON CIVIL ENGINEERS & SURVEYORS T T 0 WNSEND, WA 98368 (360) 531-1 ul l APRIL 21, 2015 REV, AUG. 27, 2015 Page 1 of 2 REV. 2 MAY 4, 2016 REV. 3 I MAY 23, 2016 Joel Peterson From: Michael <santiago2@cablespeed.com> Sent: Wednesday, May 25, 2016 8:16 AM To: Joel Peterson Subject: WILKINS PROJECT Attachments: WILKINS SW REPORT _0524_16.pdf, Wilkins_STORMWATER_0523_16 WILKINS SITE PLAN (1).pdf, Wilkins_STORMWATER_0523_16 SHEET 2 DETAILS (1).pdf; ATT.pdf Good morning Joel..... attached is a copy of the stormwater report for the Wilkins project....) will deliver a hard copy to your office at 9AM this morning..... Michael