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SUB18840 HEX Exhibit 22Transmittal Date: May 11, 2015 To: Janelle Hitch, P.E. City of Bainbridge Island From: Kelsey Laughlin, P.E. kq— Browne Wheeler Engineers, Inc. Re: BGH Sunrise Preliminary Plat Report PRE18840 — Revision 1 Enclosed is the revised Report for the Rolling Sunrise Preliminary Plat dated 5/11/2015. The plans have not been revised. The general items that were revised in the report are the following: 1. The threshold determination discussion incorporates the Hearing Examiner's revocation of COBI's policy to allow infiltration to be taken into consideration when evaluating Minimum Requirement thresholds. 2. Minimum Requirement No. 7 thresholds. 3. Soil explorations completed, assumed infiltration rates and the additional studies required prior to plat utility design. 4. Assumption of a typical residential lot and rain garden sizing applicable to the preliminary lot layout. 5. Summary of Stormwater Minimum Requirements in Table 2. 6. Engineering Calculations including: a. Breakdown of predeveloped and developed land areas and types, b. WWHM3 screen shots of predeveloped and developed site areas and resulting flows, illustrating below the 0.1-cfs increase threshold, c. South and north access driveways infiltration trench sizing, d. Rain garden sizing for a typical residential building lot for rooftop and driveway areas. Please contact us if you have questions. Browne Wheeler Engineers, Inc. 241 Ericksen Avenue NE Bainbridge Island, WA 98110 phone 206.842.0605 fax 206.780.9322 EXHIBI1' 22 BROWNE • WHEELER ENGINEERS, INC Revision 1 May 11, 2015 March 24, 2014 Michel Girard BGH Development, LLC Michel@BGHdevelopment.com 206.335.1649 Re: Rolling Sunrise Subdivision - Preliminary Plat Dear Michel: This letter presents our preliminary drainage, utility and road design for the proposed BGH Rolling Sunrise Preliminary Plat. The proposed plat includes the subdivision of one 3.41 -acre parcel into 7 single family residential parcels. EXISTING CONDITIONS The site is located south of the road end of Sunrise Drive, and north of Hyla Avenue. Currently the l site is undeveloped with grass, brush and trees. The site is served by a gravel access driveway l through a 20 -ft easement from Sunrise Drive. The soil is mapped by the United States Department of Agriculture as Harstine gravelly ashy sandy loam. The site slopes generally to the south gently to steeply across the site. SITE ACCESS Existing The site currently has a gravel driveway located in an easement which provides access to the site from Sunrise Drive to the north. Proposed The existing access driveway to the north will be widened to meet road standards and fire access requirements and extended to serve the north 4 lots. The driveway will be widened to 12 -ft with 2 and 3 -ft gravel shoulders as required by the City. The length of driveway with 2 -ft shoulders rather than 3 -ft is 200 -ft, from Sunrise Drive through the 20 -ft wide access easement to provide space for a 2 -ft wide infiltration trench paralleling the driveway. A new south access is proposed off of Hyla Avenue to the southwest in which an easement through private property exists. The new access approach will be at a 90 -degree turn in Hyla Avenue. 1 Because both access roads are gravel surfacing, the road approaches are proposed to be gravel. 1- 241 ERICKSEN AVENUE NE, BAINBRIDGE ISLAND, WA 98110 206.842.0605 infoRi BrowneWheeler.com REVISION 1 STORM DRAINAGE Existing Stormwater appears to infiltrate into the soils on-site or flows in a dispersed manner with no indications of runoff on-site. Downstream System The site drains south toward Hyla Avenue and two private properties (see Drainage Map). Hyla Avenue is a gravel road that does not have any stormwater management infrastructure installed. Stormwater runoff appears to flow in a dispersed manner south to a closed depression along Hyla Avenue, approximately 200 -ft from the southwest of the subject property. The property owner southwest of the project indicated that water frequently ponds on both sides of Hyla Avenue on private and public property where it eventually infiltrates. The property southeast of the project site also has an apparent closed depression along the south edge but the owners have not indicated any issues related to stormwater runoff. Proposed The proposed project consists of providing storm drainage facilities for two access driveways to serve the seven lots. The storm drainage system will be designed to infiltrate 100% of the stormwater runoff from the driveways on-site through the installation of infiltration trenches along the two access driveways. All new gravel access driveways will drain through a grass shoulder to an infiltration trench along the driveway to allow stormwater runoff from the driveway area to infiltrate into native soils. Check dams will be installed along the infiltration trenches as required to disperse infiltration and prevent accumulation of water in one spot. Threshold Determination The impervious areas for the proposed access driveways were used to evaluate the Minimum Requirements, as summarized in Table 1. Table 1 - Impervious Areas Proposed Total Existing Impervious New Impervious Impervious Area (sf) Area (sf) Area (sf) North Driveway 6,450 1,970 4,480 South Driveway 4,350 0 4,350 Total 10,800 1,970 8,830 A portion of the north access driveway overlaps the existing gravel driveway, about 9 -ft wide, and will be widened to meet the City road standard. The driveway overlap reduces the new impervious area of the north driveway to 4,480 -square feet (sf). A total of 8,830-sf new impervious area will be created by the north and south driveways; therefore Minimum Requirements No.'s 1-10 apply to the project as outlined by DOE in the Stormwater Management Manual for Western Washington BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. Lu- /NiO� N 0 75 150 300 600 900 TOPOGRAPHIC INFORMATION BASED UPON KITSAP COUNTY LIDAR AERIAL SURVEY, 2-FT SCALE: 1" = 300' CONTOURS. ELEVATION DATUM: NAVD88. DRAINAGE MAP BGN - SUNRISE FIMN E: GAAP.f PLOTOATF. Y1 l I Into eu of nr nc�nrc ixnr��i BROWNE • WHEELER ENGINEERS, INC 241 ERICKSEN AVENUE NE BAINBRIDGE ISLAND, WA 98110 P 206.842.0605 INFO@BrowneWheeler.COM REVISION 1 i� (SWMMWW), 2005 edition (Figure 2.2). Table 2 describes how each of Minimum Requirements No.'s 1-10 will be met. Minimum Requirement No. 7, Flow Control requires construction of flow control facilities if any of the following thresholds are exceeded: If the project will have a total of 10,000-sf or more of "effective" impervious surfaces. Table 1, above, shows the project will result in greater than 10,000-sf. However this area is not ..effective" because the runoff will be fully infiltrated and not discharged off-site. 2. If the project converts %-acres or more of native vegetation to lawn or landscape, or converts 2.5 -acres or more native vegetation to pasture. We assumed 4,000-sf of landscape per lot which results in approximately 0.64 -acres, which is below the %-acres threshold. There will be no conversion of native vegetation to pasture. 3. If the project will result in an increase in the 100 -yr frequency peak flow of 0.1 -cubic foot per second (cfs) or greater, as estimated by Western Washington Hydrology Model Version 3 (VWVHM3). WWHM3 was used to model the entire site, including the access driveways and projected rooftop, driveway and landscaped areas for each of the seven lots. The model predicted an increase of 0.05-cfs, which is below the 0.1-cfs threshold. The attached calculations present a breakdown of land type areas used in the WWHM3 model for the predeveloped and the developed scenarios. The predeveloped scenario is a moderately and steeply sloping forested condition with Type C soils. In the developed scenario, the areas of driveway and rooftop which are infiltrated in either rain gardens or infiltration trenches are removed from the area modeled in the developed scenario because they are designed to infiltrate 100%. Minimum Requirement No. 7 indicates "that portion of any development project in which the above thresholds are not exceeded * shall apply Onsite Stormwater Management BMPs in accordance with Minimum Requirement No. 5." Following the SWMMWW, on-site BMPs will be utilized to infiltrate water on-site because flow control facilities are not required. * Deleted "in a threshold discharge area" per BIMC 15.20.060.B. Soil Infiltration The City determined that the on-site soil investigations performed by Daves Septic Services, Inc., dated 7/3/2013, is adequate soil exploration for Preliminary Plat submittal and approval. An infiltration rate of 0.5-inches/hour was used for preliminary facility sizing, as outlined in our memo dated November 6, 2014. Prior to Plat Utility Permit submittal, a geotechnical engineer will need to perform soil investigations to verify site suitability of the soil for infiltration via trenches and water quality treatment in accordance with Chapter 3.1 Roof Downspout Controls and SSC -6 Soil Suitability for Treatment in Chapter 3.3.7 Site Suitability Criteria in Vol. III of SWMMWW. If the soils are found to be unsuitable for infiltration trenches, rain gardens, with different site suitability criteria, will be used. 4 BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. Sur,Yi sQ, Start Here Does the site have Yes See Redevelopment 35% or more of existing impervious Minimum coverage? Requirements and Flow Chart Does the project convert (Figure 2.3) N= '/a acres or more of native vegetation to lawn or Does the project add No landscaped areas, or 5,000 square feet or convert 2.5 acres or more more of new of native vegetation to impervious surfaces? pasture? Yes Yes No Does the project have All Minimum 2,000 square feet or Requirements apply to more of new, replaced, the new impervious or new plus replaced surfaces a— nd converted impervious surfaces? pervious surfaces. ------ Yes No Minimum Does the project have Requirements #1 land -disturbing through #5 apply to activities of 7,000 the new and replaced Yes square feet or more? impervious surfaces and the land disturbed. No See Minimum Requirement #2, Construction Stormwater Pollution Prevention Figure 2.2 – Flow Chart for Determining Requirements for New Development �InewS, Inc 5 February 2005 Volume I – Minimum Technical Requirements P_9 REVISION 1 ) Individual Lot Development The development area of each lot will be determined by the individual purchaser. All stormwater runoff generated from each lot will be kept on-site to the maximum extent practicable through the installation of rain gardens or other methods to infiltrate all stormwater from new impervious areas. We evaluated the preliminary home layouts shown on the plans which range between 1,100-sf and 2,400-sf of rooftop area with driveways to each lot varying between 400-sf and 1,250-sf. Attached is a WWHM3 output illustrating an average 2,000-sf rooftop area and 1,000-sf driveway area combination infiltrating 100% of stormwater runoff through a 200-sf rain garden. This is NOT the largest impervious lot coverage allowed by code but a reasonable coverage for the lot based on preliminary plans. Drainage plans for individual lots will be developed during their respective building permit applications. Disturbed landscaping areas will have the soil amended in accordance with BMP T5.13 Post -Construction Soil Quality and Depth. ON-SITE UTILITIES WATER Existing There is no water utility connection currently to the property. Kitsap PUD's water system is in the vicinity of the project. Proposed A new 8 -inch water main will be connected to the water system in Sunrise Drive. The new water main will be extended south through the access easement and west and south to provide water service to all seven lots. Two fire hydrants will be installed, one along the North access driveway and one along the South access driveway and will be served by this new water main. Water service for the proposed seven lots will be provided through seven new 5/8" water meters, connected to the water main extension. SANITARY SEWER Existing There are no sewer services currently serving the property. Proposed Each of the seven lots will have a private on-site septic system. The systems have not been designed but space is allocated for drainfields to maintain required separations from stormwater facilities. Power, telephone, and television cable will be designed by others. 6 BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. REVISION 1 FRONTAGEIMPROVEMENTS Existing There are no frontage improvements required since the property does not front any right of way. Proposed The property does not front any rights of ways and no frontage improvements are proposed. EROSION CONTROL The Contractor will be responsible for maintaining erosion control facilities on the site during construction and for ensuring that sediment does not leave the site. The general principles of construction pollution prevention are: • Retain native vegetation • Prevent erosion rather than treat sediment laden water • Employ site specific best management practices (BMPs) • Divert upslope runoff around disturbed area • Phase construction operations to reduce total amount of disturbance at one time • Amend soils before seeding • Minimize the slope length and steepness of disturbed areas • Reduce runoff velocities • Prevent the tracking of sediment off site • Employ BMPs that address not only erosion but also other potential pollutants. A detailed erosion and sediment control plan will be developed during final design. Very truly yours, BROWNE WHEELER ENGINEERS, INC. 5/11/2015 5/11/2015 LM- ��0?FClB T_ERt% Cl� r0� R� 48030 EO ss10NAL E��\ �SSIONAL E�w BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. i� REVISION 1 Table 2 Summary of Stormwater Minimum Requirements Minimum Requirement Comment 1. Stormwater site plan A stormwater site plan will be presented. 2. Construction stormwater A detailed construction stormwater pollution pollution prevention prevention plan will be developed during final design. 3. Source control of pollutants Not applicable. 4. Preservation of natural All stormwater will continue to discharge in the drainage systems and outfalls same location. 5. On-site stormwater Stormwater will be kept on-site to the maximum management extent practicable through infiltration and the amendment of all landscaping areas. 6. Runoff treatment Water quality treatment for the access driveways will be provided through onsite best management practices. Stormwater treatment facilities are not required. Water quality treatment requirements for driveways on each lot will be determined during development of their respective building permit submittals. 7. Flow control Infiltration of stormwater runoff will reduce runoff rates below thresholds to require flow control facilities. On-site BMPs will be utilized to infiltrate water on-site. 8. Wetlands protection Not applicable. 9. Basin and watershed planning Not applicable. 10. Operation and maintenance An operation and maintenance manual will be prepared during final design. BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island 8 Browne Wheeler Engineers, Inc. i� REVISION 1 ENGINEERING CALCULATIONS BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. BGH - Rolling Sunrise Browne Wheeler Engineers, Inc 5/11/2015 PREDEVELOPED Area (sf) Area (ac) Slope Area (sf) Area (ac) SD Method Model Land Type Area (sf) Area (ac) Slope Area (sf) Area (ac) Land Type Property 149035 3.4214 Mod 5-15% 82305 1.8895 C, Forest 38844 0.8917 Steep>15% 66730 1.5319 C, Forest N. access Ease. 3976 0.0913 Mod 5-15% 3976 0.0913 C, Forest S. access Ease. 1159 0.0266 Mod 5-15% 1159 0.0266 C, Forest Total 154170 3.5393 154170 3.5393 DEVELOPED 10 Area (sf) Area (ac) Slope Area (sf) Area (ac) SD Method Model Land Type Property 149035 3.4214 Mod 5-15% 54180 1.2438 1.2438 C, Forest Steep>15% 38844 0.8917 0.8917 C, Forest Mod 5-15% 28000 0.6428 0.6428 C, Lawn North Road Flat 0-5% 3625 0.0832 Infiltrated - Road, Flat South Road Mod 5-15% 3386 0.0777 Infiltrated - Road, Mod Flat 0-5% 14000 0.3214 Infiltrated - Rooftop Mod 5-15% 7000 0.1607 Infiltrated - Driveway N. access Ease. 3976 0.0913 Mod 5-15% 1172 0.0269 0.0269 C, Lawn Flat 0-5% 2804 0.0644 Infiltrated - Road, Flat S. access Ease. 1159 0.0266 Mod 5-15% 203 0.0047 0.0047 C, Lawn Mod 5-15% 956 0.0219 0.0219 Road, Mod Total 154170 3.5393 154170 3.5393 2.8318 10 REVISION 1 Entire Site & Access WWHM3 Model HW HM3 BGHN Ie Site ■ MweEbade Subbesin r DNla�mBwwnla Poe: Solace lm.B 6re,maeMw Flnwe To : AewainBe.m r snw,wysde<roa j PevweTdel ®pum Immmua iaa BZ19 Mee J Been idtl BTB _..__. Mm J Dm Zeo I Go I 11 BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. Subbmin NemeSWQFlaws To:in B.m FSh O*Stleeedi B6NSh1Ni �REIN FEW] �—1 I– fl oFi RAT 0 rPR.Pmpm, M f"'.D AYSF1ki 0� r AS.PUNe,saro CJ r ofl1VEWAT5M0o LJ �" TI rAS�Irm M1�� r AIB.Isml,Mstl D f"oflNEWAYSSTEEP r' IDEWAtKSMAT D C F,l r GFaeq.Fld 0 r' SmEW MDD SIDEW STEEP F: GFae6Mw 80071 I F [. FdaLSbeP 16319 r 0 r P T (" PAA N MDD B _ _ _ _ _ F C Ptlu( o r GPeWe, atl ' o f PABF➢IDSTEFP D r PDND �J r C, Pear Slum O _ f.GLM Mlm Ebrieltt F 4Larm.Mod o Jr C Lein Strop 11 _ � _ _ _ _ Periurstdd 358{ M.,m I�memve id6 � 4an Bm T.d 1583 Ma Sere xy Lo.Mty J JJ J xt Y- Dexbcl Ze'o Snlxn Nrr-- Go Q WWHM3 BGH Vin tette D&EOPCD FBe Fbl Yiw Hdp MweEbade Subbesin r DNla�mBwwnla Poe: Solace lm.B 6re,maeMw Flnwe To : AewainBe.m r snw,wysde<roa j PevweTdel ®pum Immmua iaa BZ19 Mee J Been idtl BTB _..__. Mm J Dm Zeo I Go I 11 BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. REVISION 1 0 WWHM3 BOHMde Site Fle Edk Yew Hdp ❑ filal&'.. - ® W 010'► ID - 911 PoCl PedeveMee4� Pl.. eragaenw -, ® 10E 801 PoCt Mdg01ad lVw P1ow(CP5) Predevel.pad M1tlpa�ed 2 Year = 0.1095 0.0992 5 Year = 0.1698 0.1562 b 10 Year - 0.2037 0.1960 U l0E C 25 Year 0.2393 0.2478 50 Year 0.2613 0.2871 100 Year = 0.2800 0.3269 0 YY Feaka I lMIM-18g9e4Of 99°egg98e° 1949 0.1296 0.1213 5 3e040^ 1950 0.2272 0.2699 1951 0.2372 0.2129 8888g8 1952 0.0811 0.0812 °8 1933 0.0641 0.0593 1 1934 0.0918 0.0834 1 10 20 30 40 60 60 70 00 90 99 1955 0.1711 0.1421 Cumulative Probability 1956 0.1409 0.1368 1957 0.1169 0.1236 DuaOau Fbx Fieaxnry 1 Wde Dae9y 1 1950 0.1163 0.0992 Hyd� Wdi0M F13clueti9n 0etlw,9e P4gwFy 1959 1960 0.0954 0.1680 0.0808 0.1566 Md7ze dMesel4 1961 0.0951 0.0794 1962 0.0599 0.0541 1963 0.0791 0.0795 1964 0.0922 0.0880 1965 0.0730 0.0689 1966 0.0736 0.0800 1967 0.1683 0.1603 1960 0.0983 0.0903 N Dtlaien FIOw Slag° fledp Evap MC1 1969 1970 0.1011 0.0836 0.0931 0.0057 1971 0.0721 0.0815 1972 0.1937 0.19D0 * L PexswT e111 (' E°9 Paaim Type 111170 1973 0.0911 0.0798 r Wab n none ^ ^ua^ ievelcxd Increase C.0gt9 < O. I efs Threslwld 12 BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. REVISION 1 ._ pWWHMT BGHwFaTBHpI SOUT14 I Poe Wit Y Hdp --. ----_ _ n QvA W RGH MM 1NNCH Fla FdM1 ViawHap HWefl OWe12 Outlet I]aWll6beem C. nne Chen Basin l Mhigrtm Subbesin Neme BOMAaam flaw F Dedada m Rypaa to PJC: Orifice Oiumeter Height OM. rA/6.IAvat4luy 10 r'SIDEWA M00- r C. Faetl.FlY _ 0 r SIDEW STEEP 0 SWNCoen POaBsulace late1pn aaded Gun flaws Te: G,a JTmrhBdl GiewlTmrh Bfill _ La 2papdy 0 F C, Faea.Mm r NGIFiAT fr PAflpNGMOD 0 Area in Hasln rr5lw D*Srwei —_ Lain 3 P. -A, l6l 0 Lbav3pamb 0 Fadlily Oimansidns InGItalian W � r 4Patlu6,M 0 r PAGIUN 5TEEP u I- C. Petlae.Me6 F FUND _ Avadablu PerVlpae Avalabls ImP6msus ll �f NR, FaaLFW �C� r1. MT 0 _. r AIB F.e Mme pO plgUaDSMOD DTP 3r�W SF Rw HeON m) Ip 05 O Eft Tdd D,th 215 Rua D'aMe(n) VES adlan Meed T,mrh DDT r AIB FnerLSMro u� r POAD55TEEP �` 10256 0 F CPaem Slw 1O— NOVA TM �nf ilk-cilon — f NS. Pnha.Fld p� r flODFTOp$AUT F A/B. Padae.Mm 0 r RNEWAVSAIAT- i3 1 f0 � f" AR Per6ae51aa pO r DPNEWAYSMOD rCLa NI u r AS.Lelm,ilal pO I- Dfl A STEEP frSIOEV�-1 QvA W RGH MM 1NNCH Fla FdM1 ViawHap HWefl OWe12 Outlet I]aWll6beem C. nne Chen Fa—] Orifice Oiumeter Height OM. rA/6.IAvat4luy 10 r'SIDEWA M00- r C. Faetl.FlY _ 0 r SIDEW STEEP 0 _ Ouh*Trend) _ La 2papdy 0 F C, Faea.Mm r NGIFiAT fr PAflpNGMOD 0 Fedllfy Oouam Elevation (X) —_ Lain 3 P. -A, l6l 0 Lbav3pamb 0 Fadlily Oimansidns InGItalian W � r 4Patlu6,M 0 r PAGIUN 5TEEP u I- C. Petlae.Me6 F FUND _ F lladamWdh y. Rw HeON m) Ip 05 O Eft Tdd D,th 215 Rua D'aMe(n) VES adlan Meed T,mrh DDT Run Type IHd 10256 0 F CPaem Slw 1O— NOVA TM �nf ilk-cilon -tMnch along accass) a6d i3 r C.Laen Fld -� D rCLa NI s ..Ir C_Iam.S 0 Pmw,rad �Mw liamnn Tdd ®Mn _— ____. 1J J J J Ram Tdd ®Ana Da ZeO FaInr,F F — GO I QvA W RGH MM 1NNCH Fla FdM1 ViawHap HWefl OWe12 Outlet I]aWll6beem C. nne Chen Fa—] Orifice Oiumeter Height OM. Fedlity Type GIaM T,m3VRed T— F- Prt *tenAp*dWFaiy Ouh*Trend) r v M NG La 2papdy 0 Fedllfy Oouam Elevation (X) —_ Lain 3 P. -A, l6l 0 Lbav3pamb 0 Fadlily Oimansidns InGItalian W � T,w Lm A M OWat slum F lladamWdh y. Rw HeON m) Ip 05 O Eft Tdd D,th 215 Rua D'aMe(n) VES adlan Meed T,mrh DDT Run Type IHd 10256 0 LeASH Sbpe 0 fly25ide56pe o NOVA TM �nf ilk-cilon -tMnch along accass) a6d --. Material Wrs tar Lga,I TFA:Wwn 01 25 Orifice Oiumeter Height OM. L.yal aamBy Da Number (In) (FI) (ds) La 2ilicpma011 0 1 re -1 �-1 a La 2papdy 0 2 Ip �{�� B —_ Lain 3 P. -A, l6l 0 Lbav3pamb 0 3 0 IBt/7 0✓ g rIFGLT-(r p kv� �a I L-4 InGItalian W � rla AVdmetl Run IaoM 01 MeauamlMreDvlRtlaWl.l PndlnuaD10 -rI --_ IdAationflmuaupn Fade 05 � Shaw Pondcmd Tehle Upm TeEb -1 Uro WdIm Salam ArealMnwbl VES -1 _J idalVpludlnf8aapmMl J TddVW.areTMneh Mmr(Mel) 10256 0 TddVdrle Thaughl'aaW.Ml 10256 PmMlarbM 100 lco� INr'ILE?A1 Tv i3 BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. REVISION 1 ® WWMM3 WH MM TBNCH Willem (1 I tcl _Z,4D ---/ _AjFl L I Lz.rTioN I /C.ewc I H, Uit V-Hdp ❑6'®a n M ' BavinlMNgaleJ ENARIOS Subbasin Name Nana® r 0eu4abss8mattw POC Nvtltft"flm3 9ulme Imatbw G'w as ' Flows To: Gia JTmd�Badl GavdTm Bw Mtipa d Aree in Bnsin Shdv Orb Sdacled I Mailebla Perviou.� yAveileble lm erviou D1116-�_ FYFW.q ___.. .. _- _ - _....-. _..__-- _Jr a/B.Faed�Matl 0 r FlNDSMOD 0 WONr AR. Fwmtslw � r NDCD55-�-� I- .Lava.Sbeo 0 1�—� r c.;, at u W fj Mo r CFda45kw r D,PmW0. FW pO r CPSNe Matl C� r C, Pa.n.e.SaeP r c.LawtBd �� rc.tawi. MnX oO Jrc.La.�slao Pa.orTdd 0�-1 ene. r pflrYT:wanmpD r OBNFNA STEEP r SIOEWAl15/FlAi r s1DEWalxsnnpD F BIDEWW!tnTEEP r PARBNSr T r PPAMNGMOD. F PAAgNGSTEEP F ND _ I� Tdd 1176 Awes J _ Bamidd 1176 Aan J DeWvl Zmo SnlarYflvf Go I VMM1Y10,13 BGHWBLTBNCH fo,'f 2`I sf Fde M yaw Hdp oG9ei6 SCM1r IM �9' f GMvtl TaBedl Mnigaled SCENARIOS -11I FefacilityNe.ame G,evd TmFM1 BeXt rNda"tk J Outlell 00e12 Outlet3 Oovmeboam Cannectian 0 Ip 0 N Megdm FacilityType jgrmtl7m to,l flin5cevio r Rayidmappfed roFacAY Ouie3t Trends r vaodaEonPcoidloF Facility Bottom Ela.,atan (it) 0 MPHFacility Oimeneione F,-❑eneh Betll T,a AL.Vp Oa et Structure i�aah Bdlpn WdlM1 2 ®®®'- EXaeve Tdd OegM1 275 Bim pbmddfl r--� 1 Bdbm dmad Tiwdl DBBI.. Bim Type �—J (' Ndd Law ��SJ / o not u;5,,a o I'nfatva&"-J'Y4ench cx4arig - -ChL- Material Layers Ior l r ' • )Ndre La ITte 110 25 Oririca OI�Hei� 0 QS a& O YW,) Lint Why 0.4 Number (In) (Ft) (de Lga2iNcbett llB 0 1 Lav2".* 2 Lap 3iHdvett 1111 G 3�-{F0 0 O.S in/hr jn Watia%►ate MweEbm3a InDlUaeon QTS - Dad =a Pha H.MtaaN .011 Memae3lrPodm Nde (NNI ri Padlmawa D10 - -- IrMttl Bedrmi Faso p5 J Show Pord Tnble 0r -T" J _. DUWdIM Solace/ ealtkardal YES :{ TddVaM Tl aled(awMl 1916 raayW yNwghl,�y(aae5) 19.1% Xaravy�LeatlltV J Tdd VO THot*RaI leweB) 0 P.m Id dW IM BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc. Typical Residential Lot Rain Garden Sizing i �Yry1HM3 BGH ah RG 11 FM Ede Y H 1 Xhemepc , Bvm 1 MHigdd SCEIUNOS SubbaeinN Tried SM La- r a r Ge,yn mBy{ewIw POC rR. nm i'p asFfltd SW— I IamBaw 6lwdnm 1-11% ___..._ M.T. Gsd rrtM BM1 _]GiseilmdiBell ��� F MOyetl Are H.d.r'. SF a*Sd M rare.ram.sM.P I r Are,Pawe.Fla r aB.v—.wed r'N13,Pmhie,St\eo r ArD.ua�FM l r aG�1 r Clwn M[d Move EWm9r JF CICS — Pmwrrael A. t. rad ®pwp -!Lj J Decehd Zea 1 Rnlrrf FMf ••;1 I;n I WNHM3 9GH ah RG REVISION 1 `pocSf y/rwcy-40t 2rcOOS( V.DoV op w� w f Retle�dxetl t C Sr Fedliy N..SER mGehn OutletT Met OWd3 aFMapW _.__ __ r __. -.._ Onwn:beem conneca'ne G p pO FedlM Type G,wdi,etl,9M F RapietimAapbdlaFxYy OuikTmndl I r.[VrvPd011pbpbFMli'f Rin Saran ®®® ®■m B®®® ffII9� SFR Ami- — - F.diry NO.. Elamfion(h) t0 FadIM Dimeniene Tm La p OWet Sbudum Pan Hera LierA BmmWdn 1p in) tl Vi ��l7 w Dixeld[ni 6 c tr`1 a eiadDp 3 Rr �`.J\ Bdlvn {sed rrtrcM1 DO[GI Rw J ,FJ b95i65ye 3 NdN�r ter 1 Materiel lnyere lar Lernl il:ckmnlnl 13 Grifirs Dinmeler Heghl OM— Lgnlwmrr 0.1 Number &) (Fl) (de) __. ladtrlvkm.lRl p r F0`415--.1 D Iar+zowoRrp 2 loo -1 r—:i D Ipn3Ti Q11 p. p �� fd—A U.. jam` J.�fM yyj`{ 1nM3WmiY p �Z'J�.J (n�11Y tr{IlWabV„ ale— Mwe Fbaaa InlilVefion [5 -*{ r mb dnedRva aM lmedl Dli Meewe11il4din Rdef l (r —'�F\ Shaw evn G10 ;{ 1eiLdm RdmmFwio ps � Show FRntl Tebla Dyn retie 1J ___..._ —& 1 Lard J '� J Uwwdbd Seleaaee lnBexeM) fyFS-- rddvd.relduaeywmlp 9.51 TdSVw Tl Fedty(xen1 IM rddvd.namwy,Runlmexl o PmcarHxuda Im `�pI �NPWVV 'CED IS BGH- Rolling Sunrise Preliminary Plat, Bainbridge Island Browne Wheeler Engineers, Inc.