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HomeMy WebLinkAboutApplication APPLICANT 4/24/2008 GREG J, ZARTMAN, P,E, BRETT C, MARTIN, P.E, KENT R. INMAN, PlS M'CHAEL J, BUCKWALD I I I I I I I I I I I I I I I DRAINAGE REPORT HILTON GARDEN INN DEVELOPMENT 38-04 Prepared By: Date Received: LEI Engineerinm and Surveying 2805 19t St., SE Salem, Oregon 97302 PH: (503) 399-3828 FAX: (503) 365-1852 APR 2 4 2008 Original Submittal U DECADES OF o ENGINEERING EXCELLENCE ~ PO BOX 25709, 2468 WEST 11TH AVE, STE, B, EUGENE, OR 97402 I (541) 683-8383 ~ P.O BOX 13423, 280519TH ST SE, SALEM, OR 97302 I (503) 399.3828 WWW,LEllNC COM I I I I I I I I I I I I I I I I I I I [ . ~~ ~-~r: - _, _~~"_~~ble OfCO:tent.:,_ -. ~ -- :-.. ~] 1 2 3 INTRODUCTION 1 ....................................................................................................................... STORMW A TER SCOPING 1 SITE CHARACTERISTICS 1 3,1 Site Soils 1 .................................................................................................................. 3.2 Precipitation........., ..........,.. ........, ......... ................... ....,.......... ............ ...................... 1 3 ,3 Topography............ ....,................ .......' ,......,..,..............,......... ..............., ....... ....... ..... 2 PRE-DEVELOPED 2 4,1 Land Use 2 ,...............................................................................................11................ 4,2 Hydrological Variables ... ..,........ ..,.................... ........... ..... ....... ................. ....... ........ 2 4.3 Stormwater Basins 2 ,PosT-DEVELOPED 3 5,1 Land Use 3 ,.................................................11.............................................................. 5,2 Hydrological Variables ........... ............. ..,........... ....,...... ........................................,.. 3 5,3 Stormwater Basins 3 J ................................................................................................... STORMW A TER QUANTITy.....,.. ..'..........".,.. ,....", ..........,....,.. ........,.. ......,..,..,.. ........,...... ........... 4 6,1 Design Variables .............,....,...: .............. ...........,.......,.... ...... ..,....,.......... ................. 4 6.2 Stormwater Conveyance ' 4 .... ........................................................................................... 6.3 1 00 Year Flood Plain 5 ................................................................................................ STORMW A TER QUALITY .. ....... .......... ....,.,... ........,................ ..,... ............... ....,...,.... ..,...... ....,.... 5 7 ,1 Water Quality Design Criteria ..,....,....................,.............,..,..........,.............,.......,.. 5 7 .2 Water Quality Design Measures .........................................,.........,........,................. 5 7 .3 Water Quality Basins ........,...................................,.............,....,....,..........,............... 5 7.4 Design Flows 6 ............................................................................................................ 7 .5 Vegetative Stormwater Quality .....................................................,........................ 6 7,6 Non-Vegetative Stormwater Quality.......,............................................................... 7 CONCLUSION 7 4 5 6 7 8 FIGURES 1 2 Existing Site Developed Site / Date Received: APR 2 4 2008 Original submittal ~ I I I I I I I I I I I I I I I I I I I A B C D E F Stormwater Seoping Sheet NCRS Soil Data City Drainage Basin Map 1 00 Year Flood Plain ODOr IDF Curve for Zone 7 Grassy Swale Curves APPENDIX Date Received: APR 2 4 2008 Original Submittal I I I I I I I I I I I I I I I I I I I 1 INTRODUCTION This report is the storm water analysis and design for the Hilton Garden Inn Development located on Lane County Tax Map 17-03-15-33, Tax Lots 1500 and 1600 in the City of Springfield. The proposed development will replace an existing hotel with a new hotel along with associated pedestrian facilities, parking areas, landscaping, and other site features, This report addresses stormwater quantity and quality standards contained in the City of Springfield Engineering Design Standards, 2 STORMWATERSCOPING A Stormwater Scoping Sheet was submitted to the City of Springfield and the required stormwater management scope items were identified by City Staff, A signed copy of the Stormwater Scoping Sheet is included in Appendix 'A ' of this report, 3 SITE CHARACTERISTICS 3.1 Site Soils The Lane County Natural Resource Conservation Service (NRCS) Soil Survey was used to identify soil types and characteristics found throughout the SIte. The site predominately consists of Co burg Soil with a Hydrologic Group 'c', NRCS Soil Data is included in Appendix 'B' of this report, The existing site is the location of a demolished hotel with associated paving and deteriorated landscaping. 3.2 Precipitation The design storm events used in this analysis are the 2-year and 25-year recurrence intervals and the City-defined stormwater quality event. All 24-hour rainfall quantities for each event are analyzed using the NRCS Unit Hydrograph method distributed over a Type IA hyetograph, Table 3.2.1 lists the 24-Hour Rainfall volumes for each Recurrence Interval. Table 3.2.1 Recurrence 'Interval (yr) Water Quality Event 2 25 24-Hour Rainfall Rainfall (in) 0,83 3,3 4,8 Date Received: APR 2 4 2008 Original Submittal P \38(DJ)\38-04\Hydro\Report\5 Dramage Report doc Page 1 of7 I I I I I I I I I I I I I I I I I I I 3.3 Topography The existing site is relatively flat with an average longitudinal slope ranging from flat to 2,0%, The total area of the proposed development is approximately 2,83 acres, The site currently has drainage outlets to the north onto Game Farm Road, to the east onto Gateway, and to the south into an existing drainage ditch, As shown on the City of Springfield drainage basin map in Appendix 'C', the existing drainage system surrounding the subject property all discharges to the same location west of the proposed development. 4 PRE-DEVELOPED 4.1 Land Use The entire property is approximately 2.83 acres and consists of a hotel that has recently been demolished, an asphalt parking lot, hardscape features, and deteriorated landscaping, The existing impervious area of the site, prior to demolition of the hotel, is approximately 2.68 acres. Figure 1 shows the existing site outlining the existing drainage sub basins, Table 4.J.1lists the pre-developed land cover of the existing site, Table 4.1.1 Land Cover Landscaped Asphalt Concrete Rooftops Pool Area (acres) 0.153 1.767 0.159 0.680 0.071 4.2 Hydrologic Variables Hydrologic variables for the Pre-Developed condition used for this analysis are derived from standard site characteristics as well as site observations, Table 4.2.1 lists the relevant composite hydrologic variable used in this stormwater analysis for the pre-developed condition, Table 4.2.1 Use Pre- Developed Curve # 94 Mannin~'s 'n' 0,02 4.3 Stormwater Basins There are three distinct drainage basins on the existing site that all ultimately discharge to the same City stonnwater system as shown on Figure 1, There were no stonnwater quality or quantity provisions on the existing site. Date Received: APR 2 4 2008 P:\38(DJ)\38-04\HydroIReport\5 Dramage Report doc Original &ie1115p;t1. I I I I I I I I I I I I I I I I I I I 5 PosT-DEVELOPED 5.1 Land Use The proposed development will create a new Hotel with impervious surfaces in the form of rooftops, an asphalt parking lot, and concrete and asphalt pedestrian ways as shown on Figure 2, Landscaping improvements will also be incorporated into the design, Table 5.1.1 below lists the land cover areas created by this development. Table 5.1.1 Land Cover Undisturbed Landscaped Asphalt Concrete Rooftops Area (acres) o 0.598 1.354 0.086 0.792 The post-developed impervious surface cover is less than the pre-existing condition, Therefore, stormwater detention is not required for this project. 5.2 Hydrologic Variables Table 5.2.1 lists the five land cover types and the corresponding Curve Number and Manning's 'n' for the developed conditions, The site has been analyzed using a composite Curve Number and Manning's 'n' of94 and 0,02 respectively. Table 5.2.1 Land Cover Undisturbed Landscaped Asphalt Concrete Rooftops Curve # 84 79 98 98 98 Manning's 'n' 0,15 0.24 0.02 0,02 0,02 Other characteristics of the post-developed condition can be found on Figure 2, 5.3 Stormwater Basins There are fifteen basins in the proposed site shown in Figure 2, As shown on the plans, rooftop runoff is routed to downspouts and conveyed off site to the north, 67% of runoff from the parking lot is routed to vegetated swales, with the remaining runoff from the parking lot area being routed to Gibson dual chamber catch basins, p, \38(DJ) \38-04 \Hydro \Report\5 Dramage Report doc Date Received: APR 2 4 2008 Originctl'~tJ~al I I I I I I I I I I I I I I I I I I I 6 STORMWATERQUANTITY 6.1 Design Variables Stormwater piping is proposed to be ADS N-12 with a Manning's 'n' value of 0,01. Swales conform to the City of Portland design standards for vegetated swales and have a design Manning's 'n' value of 0,24, 6.2 Stormwater Conveyance The stormwater conveyance system is designed to safely pass the 25-year storm event. Proposed stormwater piping has been designed to have a minimum, half full, self-cleaning velocity of 3 fps, Water quality swales have been designed with slopes, cross sections, velocities and freeboard as per the City of Portland Stormwater Management Manual. NRCS unit hydro graph method was used to calculate the total runoff from each of the proposed basins, shown in Table 6.2.1 below, Table 6.2.1 Basin 1 2 3 4 5 6 7 8 9 10 I 11 'I 12 I 13 14 15 16 p, 138(DJ)\38-04\HydroIReport\5 Dramage Report doc Peak Flow (cfs) 0229 0167 0058 0064 0021 0048 0015 0025 0150 0395 0080 0038 0026 0362 0395 0676 Date Received: APR 2 4 2008 Original Submittal Page 4 of? I I I I I I I I I I I I I I I I I I I 6.3 100 Year Flood Plain The entire site is beyond the 100 year flood plain, The Flood Insurance Rate Map (FIRM) for the site is shown in Appendix 'D t. 7 STORMW A TER QUALITY 7.1 Water Quality Design Criteria The design standard for stormwater quality selected for this project is the City of Portland Stormwater Management Manual, Grassy swales have been selected to address required stormwater quality measures for 67% of the proposed parking lot area and Gibson dual chamber catch basins for the remaining 33%.. Per the stormwater quality design standards, the maximum storage depth may vary between 6 and 12 inches. The maximum allowable side slope is 4(H):I(V), The minimum flat bottom width is 2 feet for private swales and 4 feet for public swales, The maximum and minimum longitudinal slopes are 5% and 0,5% respectively, The maximum slope surrounding the swales is 10%, Swale lengths are determined from charts provided under Grassy Swales in the Portland Stormwater Management Manual. 7.2 Water Quality Design Measures Grassy swales have been designed to conform to the standards outlined in the previous section, Parking lot areas not routed to grassy swales are routed to Gibson dual chamber catch basins, 7.3 Water Quality Basins Stormwater basins routed to either grassy swales or catch basins are shown on Figure 2, Runoff length, slope and basin areas are also labeled on this figure, Date Received: APR 2 4 2008 Original Submittal P \38(DJ)\38-04\HydroIReport\5 Dramage Report doc Page 5 of7 Original Submittal, NRCS unit hydro graph method was used to calculate design flows for each stormwater quality facility, Stormwater quality flows are shown in Table 7.4.1 below, I I I I I I I I I I I I I I I I I I I 7.4 Design Flows Table 7.4.1 Basin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Water Quality Flow (cfs) 0021 0015 0005 0006 0002 0004 0001 0002 0013 0035 0007 0003 0002 0032 0035 0035 7.5 Vegetative Stormwater Quality Date Received!: APR 2 4 2008 Method of Treatment Vegetative Non-Vegetative Non-Vegetative Non- Vegetative N on-Vegetative Non-Vegetative I Non-Vegetative I Non-Vegetative 1 Non-Vegetative I Vegetative Non- Vegetative Non- Vegetative Non-Vegetative Vegetative Vegetative Non-Vegetative Design characteristics of runoff from areas routed to the storm water quality swales from each basin is summarized in Table 7.5.1 below, Table 7.5.1 Swale 1 2 3 Length (ft) 100 145 110 Slope (%) 0.50 0.50-1.50 0,50 Flow (cfs) Stormwater 25 Year Quality Event Event 0.032 0,362 0.070 0,790 0.021 0.229 The required length of each swale was derived from Exhibit 2-15 of the City of Portland Stormwater Management Manual included in Appendix 'F'. All flow rates for the stormwater P \38(DJ)\38-04\Hydro\Report\5 Dramage Report doc Page 6 of7 I I I I I I I I I I I I I I I I I I I quality design event, as defined by the City of Springfield, require the minimum length swale of 100 feet. 7.6 Non-Vegetative Stormwater Quality Design characteristics of runoff from areas routed to Gibson dual chamber catch basins from each basin is summarized in Table 7.6.1 below. Table 7.6.1 Catch Basin 1 2 3 4 5 6 7 8 9 8 CONCLUSION Stormwater Quality Event Flow ( cfs ) 0.015 0.068 0.004 0007 0.006 0.001 0,002 0.002 0.013 25 Year Event Flow ( cfs ) 0,167 0.734 0.048 0,080 0,064 0.015 0.025 0,026 0.150 The proposed development provides stormwater conveyance that can safely pass the 25-year return event and provide stormwater treatment for the City of Springfield water quality event of 0,83 inches per 24-hour period as well as the 2-year storm event. All proposed piping and water quality swales conform to the City of Springfield standards and the City of Portland Stormwater Management Manual. Date Received: APR 2 4 2008 Original Submittal P \38(DJ)\38-04\HydroIReport\5 Drainage Report,doc Page 70f7 I I I I I I I I I I I I I I I I I I I Date Received: APR 2 4 2008 Original Submittal Figures I I I I I I I I I I I I I I I I I I I HOTEL DEVELOPMENT EXISTING DRAINAGE BASINS LEGEND :~.<,.,' ,'J ''\',.... ,\ ,>\'j DRAINAGE BASIN #2 Date R ceived: Original S~~~hiL. ~ I I 0' 80' 160 - -- ~ "\r. -==~--= ~-~ ----=.-~- ,..- \ - ~ .---"'" .) .. - \ .. "" -",,-.--- .--- ~ _M...M...."".,...--, M \\ I ~~ ~ ~ ~~ ~ )/ # ~ / DRAINAGE BASIN DIVISION LINES ~I//,;/ / / / /"////; ./ ;I .- , ,/:" / 1:' '\ \' \\ \ \ \ \ , \\' .\\\\\\\ ,,\\ ,\ DRAINAGE BASIN #3 DRAINAGE BASIN #1 ~ .. ! I EXISTING" DRAINAGE \ BASIN #1 ~ :i: 0, 50 ACRES; - ----~--.I E,JSTlNG DRAINAGE --BAsIN #2 :i: 1.23 ACRES ...... C/) ~ o ~ ex: ~ ~ ~ ~ IJ --~) ~ I J 11111 III II! III ~ EXISTING DRAINAGE BASIN #3 :i: 110 ACRES , "J DESIGN W. KUENZI, EfT SHEET LEI ENGINEERING & SURVEYING DRAWN A DIVISION OF LOGGING ENGINEERING INTERNATIONAL, INC, CHECKED APPROVED W. KUENZI, EIT M. DUMAN, PE B MARTIN, PE DWG DATE PROJECT 2008 \ ~ ~ ! ~ <Q FIGURE 1 38-04,DWG 38-04 I I I I I I I I I I I I I I I I I I I HOTEL DEVELOPMENT PROPOSED DRAINAGE BASINS ..=,;y==~ \ -- --~, \ '" '\ j NOTE SEE ENGINEERING PLANS FOR j PLAN AND PROFILE OF STORM ORAl! GE SYSTEM r - --~ ------ ~ ... ~ Date Received, APR 2 4 2008 HORIZONTAL ~ I 0' 80' Original SubrmttaL_________<^ u DESIGN W, KUENZI, EIT W KUENZI, EIT M DUMAN, PE B MARTIN, PE LEI ENGINEERING & SURVEYING DRAWN A DIVISION OF LOGGING ENGINEERING INTERNATIONAL, INC CHECKED APPROVED I ~& ~~ ~ ~ ~ ~ ~ ~ /<<J ~ ~ f ~ <0 I I 160' SHEET FIGURE 2 38-04 DWG DWG DATE PROJECT 38-04 I I I I I I I I I I I I I I I I I I I Date Received: APR 2 4 2008 Original Submittal Appendix A: Stermwater Seeping Sheet I I I I I I I ~ . I I I I ~ ~ ~ I ~ I I J9/2006 09:20 FAX 541 736 1021 (r' CITY OF SPRINGFIELD PW III 002 rt' pusuc WORKS Ot=PARfMt:.NT I Engineering Division Fax: (541) 736-1021 STORMWATER MANAGEMENT SYSlfEM SCOPE OF WORK (AMa beJqw this /1JI.efllld out l1y ApJ Ucrmt) (f'lease retl1171 to Mail StotJd(JY'@ CIty ofSpri71g/ield Public Works engine ~ng; Fca Ii 736-.J02J. PhoM # 73MOJS), emazl mstouderniJci.sprin;fie/d. 01, us Project Name: So,,',"~~e\J. ",\-e\ be""h.,,~Applicant: i~ L. P foJttI, fE: Assessors Parcel ",..V \.,.o~.IS'1' hots I~ ...I&/Jo._ Date: 3}g JO(P Land Usc(.s): ,i!bfl!l 'Of'4el".. ,.,.: (CA)_UR\(~1"rtt'i~~hone #: 1(54]) 926-7634 ProjectSize(Acrcs)~ 12,83aeres Fax#: (r;",,':>4J7l.h..i539 Approx,lmperv-iousArea: l,qgcllCye'$ Email: +rll(. t) r4~wes+e.c:.\1Y\ Project .Description (Include a copy of Assessor's map): '/ hi!> Pr".j ~~+- '-I i II c.~~~""e ~ "~ kot~\ Aevdopnu::""t. .,."~ eXi::lH....~ S;~ i~ '" ~I)te\ -r"'~+- ~il\ \De de.~u[iS~ed +c dCC_OMOd~~e c:..o"'S+-Y'weti 0.., 4!>~ 0.. 1A.e..,j \.4o}el. Ike r".pQ5"("cl d~ vel, f H4~",+ ~,\\ dec.V"t"o..~ -t-~.e +tl+~1 iWlpe~"'i !)lA.s. ..slAV'.f"'~ G~ ~~ $i+.. I J.. Drainage Proposal (Public connection(s), discharge locatlon(s), etc, Attach additional sheet(s) if necess!lJ)': Tke f...~p~,ord cl~"elor"'e\ot+ \"lJ~l\ 1.t,\-jliU!. e)l.\~t;~j d.\S't.lc4~~ 'oecd',,;Q,~~ t.." Go.,. ~ ~........... 'it.oc..J,.) G-Cl-.te ~a.'f S *,-ctl Ct."",d (I.... t JI,.,\:S ~-~ j ~,h..'-' ~ 'h..se,cH" +l,,\ 5 ~"'Qy-e-V+j ....~ ~.-: 'B<.\-t-wa.'f o....-y-Q,W\? ?\ecl~~ S~'t a.+-\-IL(.\..1.-E'.\ "JC.k;",;~ Je~\;~ ?....ot't>s~.t s:.;"'~ ~~"'-~Q,~'" J.\$(.\"'oCl.'d~ \, ~1lI.-t-i OI",S, 'Pronosed Stormwater Best Maoaf1!eID~t Practices: I-- The site WIll utili7.C underground ..,,,,,..Water quality faCllmes in add.1tion to oil!\''llter separator catch blll\1nJl and some of the following best ma\lll.,gemcnt practIces from the CIty of Portland StonnwateT Mar ageracnt Manual: lnfiltration Planters, Flow Through Planters, Vegetated Swales, Grassy Sw.ales, Vegetated Filter Strips, ani, Vegetated Infiltration Basins, I , (A1-~--D. below tJds lin.e filled .out In' the CitlI and Returned to tlu! MD&ant' (At a mininntm, all boxes checked by the Cily 011 th2ftont and 6ack a/this sheet shall be submiued for (U1 apollcation La be comolete/or submiUa/, although otM, requlreme11ls may be necessarv.) I , Draill~e Study Tvnt fEDSPM Section 4.03,2)~ (Note. VB mav ~ substituted for Rational Method) o Small Site Study - (use Rational Method for calculations) Ji D Mid-Level Development Study - (use Unit Hydrograph Method for c leu lations) Ii Full Drainage Development Study - (use Umt Hychograph Method Ii,r call;ulations) Environmental Considerations: I Ii Wellhead Zone. ""'I ~,.. 2- y~ '1 ~ ,riM; ji Hillside Development: rV1' .. WctlandIRiparlan: fi, 1\ -IF100dWaYIFJOOdPlain: i:;i~ . Soil Type; )i- - ~ U~, OtherJurisdictions-- Downstream Analvsis: ) ~ I} Nt A o Flow line for starting water surface elevation: o Design HGl to use for starting water surface elevation: o Manhole/Junction to take anal)sis to: uate Received' Return to Matt Stouder@ Cff:y of Spnngf;a/d. emaif: mstauder@ct.l:~nnafield.or,I,lS, FAX: (541) 73&.-1021 I APR 2 ~ 2008 I I Original Submittal I I I I I I I I I I I I I I I, I I, I Ii J9/2006 09:20 FAX 541 736 1021 Cl~~ U~ ~YKINGtl~LV YW I(!JUUJ . , r r- ror Ot'/lelJollJse On/}- fJJ.< COMPLETE STUDY ITEMS '* Based upon 1M information provided 011 the front of thIS SNW. the follow.'ing represents a mlllimum afwhatlS neededfo,. an application to bll conrpktefar submiltal wi1h 1'rtS~ct to drai~: haweuer, thisli$l should nat be used in lieu of the Spnngfmld Development Code ($DC) or the CIty s Engineering Design Manual. Compllance'lllleh these requsnm4nJ.S does nol COf/.1lltute site approval; Addinaruzl siJs $~cdM: irrform(ljion may be nlqulred Nole. Upon scopir,g sheet submiltal, enswe completedfor", }nr been signed in the ~e provided beluw' Interim Desl~ SbndardsIWater Quality (EUSI'M Cbaptn 3) Retr'il NIA .. D All non-building rooftop (NBR) inlpet"llious surfaces shall be pre-treated (e,g, multi-chambered catchbasin w/oil filtration nlcdia) for slormwlItcr quality, Additionally, a mmimum of 50% of the NSR impervious surl8cc shall be treated by vegetated methods II 0 Wherc ~quired, veget-ative stormwater design shall be conSIStent with interim design standards (EDSPM Section :;,02), st=t forth b}' the BurCiu of Environmental Services (BES) or Clean Water Services (CWS), o 11 For new NfJR imperviOllS area less than 15,000 square feet. a simplified design approach may be followed as specified by the BES for vegetative treatment. , 0 rf a smrmwater treatment s~le is proposed, submit calc.ulations/speeiflCations for si2Jng, velocity. flow, side slopes, bottom slope. and ~ mlX consistent WIth either 6ES or CWS requirements, . . ] Water Quality calculatlon.q as required in S~ion 3 03,) of tbe EDSPM' o Ii All building rooftop mounted equipment, Or other fluid contaIning ~uipment loctlted outside of the building, shall bt; provided with ~"'eol'ld8l)' containrnont Of' woathcr reslGtMt enclosure, General Study R.equlrementB (E...~t ,d $ec:tioa 4.03) ~ 0 Druinage :rtudy prepared by a proressional Civil Engineer licensed in the stale of OregOl:l, o A completl: dl1l1nage study, 11$ required In EDSPM SectIon 4.03,1. including a hydrological Study map, o Calculations showmg system capacity for a 2-year stDrm event and ovefflow effccts of a 2S-year stomJ evcnt. liThe time of concentratton (Tc) smll be determined using a 10 nunute start time for developed basins, Review of Downstream System (EDSPM Section 4,03.4,q o 1M A downstteam drni11age analysis as described in EDSPM Section 4,03 4 C, On-site drainage shall be governed by the Oregon Plumbing Specialty Code (OPSe) o jj.BlcvatiOll$ of me HGL and flow Jines for both city and private systems where applicable. Design orstonn Systans (EDSPM Section 4.04) : fjj. ] Flow lines, slopes, ritu c1CVl1tions, pipe type mid SIzeS clearly mdiclltod ~n the l'lml sct. o .. Msnimwn pi~ cover shall be I B Inches for reinfofCed pipe and '36 Il'lches for plain conctete and plastic pipe materials. or proper enzin=ing calculation~ ~hall be provided when less. The covet shall be sufficicnt to support an 80,000 Ib load without failW'e of the pipe stracttlTc. o .Manning's "TI" values F()t pipes shall bc consistent with Table 4-1 oftbe BOSP, All StOrm pipes shall be designed to achieve a minimum velocity ofthrcc (3) feet per second at 0,5 pipe full'based 01'1 Table 4.1.as well, Other/Misc Ii 0 Existwg and proposed contours. located at one foot interval. Include spot elevations and site grades showing how site drains . 0 Pnvatc stQ1'mwater casements shall be clearly depicted on Itlans when private storm water flows from one property to another o ." Drywells ~hall not rccc:ive runoff from any surfl1Ce w/o being treated by one or morc BMPs, with tb~ exception of residential building roofs {EDSP Section 3.03.4,A), Additional provisions apply to this as rcquire.c:l by tbe DEQ. R.cfcr 10 the wcbsitc, www dea.,saue,-oT uslWt'l/~l'i2lOI'dwalulchome.hcm for more Ulfonnation, o ~ention ponds sh~l1 bc dcslgned 10 limit runoff'ro pre--devclopmcDt rates for the 2 through 2S~year storm events "'This/onn l/tcUI ~ included (l$ IUI artacllml!'fl4 i1L~ide the jrOlff c;o~u. of tl,e sto- ...",..1Lr IStlldy * IMPORTANT: ENGINEER PLEASE READ BELOW ANfJ SIGNt AS the engineer of record, I hereby certify the above required items ere complete and included with the submitted stonnwater stud)' and plan set Sign~ J- V ( Date Received: Date-S-Izy/dc. Form VersioD 2; March 2004 APR 2 4 2008 Original submittal I I I I I I I I I I I I I I I I I I I Date Received: APR 2 4 2008 Original submittal Appendix 8: NRCS Soil Data - - - - - - - - - - - - - - - - - - - SOIL SURVEY OF LANE COUNTY AREA, OREGON APft12 4 2008 Meters 200 - - o 50 100 o 200 400 800 1,200 Feet 1,600 (.rf<<t~3mmtal 3/ I 0/2006 Page 1 00 - - - 0 -. ra: ~ 0 ~ en )> I.\) ..... c " CD CT ::::c 3 ....., ;0 ;:;: CD 6) .. 0 ....., CD (::) (::) < co CD Q. USDA Natural Resources Iiiii ConservatloB Semce - - - - MAP LEGEND . SOIl Map Units CItIes DetaIled Counties . Interstate Highways Roads Ralls oC ~ Water Hydrography Oceans - - - - - - - ----- SOIL SURVEY OF LANE COUNTY AREA, OREGON MAP INFORMATION Source of Map Natural Resources Conservation Service Web SOIl Survey URL http Ilwebsollsurvey nrcs usda gov r Coordinate System UTM Zone 10 SOIl Survey Area Lane County Area, Oregon Spatial Version of Data 2 SOil Map Compilation Scale. 1 20000 The orthophoto or other base map on which the sOil lines were complied and digItIzed probably differs from the background Imagery dIsplayed on these maps As a result, some minor shifting of map umt boundanes may be eVident 3/10/2006 Page 2 00 I Sot! Survey of Lane County Area, Oregon I I I Map Unit Legend Summary Lane County Area, Oregon Map Umt Symbol Map Umt Name Acres III AOI Percent of AOI 26 Chehahs sIlty clay loam, occasIOnally 18 2 flooded 73 I I I 32 Coburg-Urban land complex 795 31 9 75 Malabon sIlty clay loam 490 197 79 McBee sIlty clay loam 57 23 I 96 Newberg loam 28 11 I I I I I I I I Date Received: I APR 2 4 2008 Original SubmIttal I USDA Natural Resonrces '" Conservation Senlce Web SoIl Survey 1 0 NatIonal CooperatIve SoIl Survey 3/1 O/200t Page 3 of3 I - - - - - - - - - - - - - - - - - - - Physical Soil Properties Lane County Area, Oregon [Entries under "ErOSion Factors-- T" apply to the entire profile Entries under "Wind Erodibility Group" and ''Wind Erodibility Index" apply only to the surface layer Absence of an entry Indicates that data were not estimated] Erosion factors Wind Wind Map symbol MOIst bulk Saturated Available Linear Organic erodl- erodl- Depth Sand Silt Clay hydraulic water extensl- and SOil name density conductiVity capacity bllity matter blllty bllity Kw Kf T group Index In Pct Pet Pet g/ec mIcro m/see In/In Pet Pct 5 Awbng 0-7 27-30 130-140 400-1400 018-022 30-59 20-50 32 32 3 7 38 7-29 50-60 1 30-1 40 001-042 o 03-0 05 60-89 1 0-2 0 37 37 29-60 27-40 1 30-1 40 1 40-4 00 017-020 30-59 00-1 0 32 32 26 Chehalls 0-13 30-40 1 10-1 30 400-1400 o 19-021 30-59 50-10 24 24 5 7 38 13-55 25-35 1 20-1 40 400-1400 017-021 3 0-5 9 20-3 0 28 28 55-70 25-45 1 30-1 50 400-1400 019-021 00-29 00-1 0 32 32 31 Coburg 0-18 27-35 1 20-140 400-1400 018-020 30-59 2 0-6 0 28 28 5 7 38 18-53 35-45 1 20-140 1 40-4 00 018-020 30-59 o 5-2 0 37 37 53-65 15-30 1 20-1 40 1400-42 00 013-015 o 0-2 9 o 0-0 5 24 24 0 ~ -. 32 <9. Cobur~ 0 0-18 27-35 1 20-1 40 400-1400 018-020 30-59 20-6 0 28 28 5 7 38 :Jl> m 18-53 35-45 1 20-1 40 1 40-4 00 018-020 30-59 o 5-2 0 37 37 en ...... c: ." ('I) 53-65 15-30 1 20-140 1400-4200 013-015 o 0-2 9 00-0 5 24 24 CT ::::c :::0 3 '" Urban ~d ..I::- CD II) 0 fI'o>o,.) CD 75 (::) < (::) Malabc n CO CD 0-12 27-35 1 20-1 40 400-1400 018-020 30-59 40-60 24 24 5 7 38 a. 12-42 35-45 1 20-1 40 1 40-4 00 018-020 30-59 05-40 28 28 42-60 20-35 1 20-1 40 400-1400 018-020 30-59 00-05 32 32 USDA Natural Resources ThiS report shows only the major SOils In each map unIt Others may eXist ~ Conservation Service Tabular Data Version 4 Tabular Data Version Date 12/13/2005 Page 1 of 2 - - - - - - - - - - - - - - - - - - - Physical Soil Properties Lane County Area, Oregon Erosion factors Wind Wind Map symbol MOist bulk Saturated Available Linear Organic erodl- erodl- Depth Sand Silt Clay hydraulic water extensl- and sOil name density matter billty blllty conductivity capacity blllty Kw Kf T group Index In Pct Pct Pct glec micro m/sec In/In Pct Pct 76 Malabon 0-12 27-35 1 20-1 40 400-1400 018-020 3 0-5 9 40-60 24 24 5 7 38 12-42 35-45 1 20-1 40 1 40-4 00 018-020 3 0-5 9 o 5-4 0 28 28 42-60 20-35 1 20-1 40 400-1400 018-020 30-59 00-05 32 32 Urban land 5 8 0 79 McBee 0-24 27-35 1 20-1 40 400-1400 019-021 30-5 9 30-60 28 28 5 7 38 24-41 25-45 1 20-1 40 400-1400 013-021 30-59 o 5-4 0 28 28 41-62 25-45 1 20-1 40 400-1400 013-021 3 0-5 9 o 2-1 0 28 32 95 Newberg 0-14 7-15 1 20-1 40 1400-42 00 012-015 o 0-2 9 2 0-4 0 28 28 3 3 86 14-65 5-15 1 20-1 40 1400-4200 012-015 o 0-2 9 05-1 0 24 28 96 Newberg 0 0-14 7-15 1 20-1 40 14 00-42 00 o 20-0 23 o 0-2 9 20-40 32 32 3 5 56 ... 14-65 5-15 1 20-1 40 1400-4200 cO' 012-015 o 0-2 9 05-1 0 24 28 :5 0 119 ~ Q) Salem en )> -- 0-7 15-20 1 20-1 50 400-1400 C " CD 011-017 o 0-2 9 20-60 20 28 3 6 48 CT ::::0 ;0 7-26 25-35 1 20-1 50 400-1400 o 09-0 17 30-59 1 0-30 20 37 3 ~ ;::;. CD 26-60 0-15 1 30-1 60 141 o 03-0 05 o 0-2 9 01-1 0 02 15 6) ~ 0 00-705 00 '" CD (::) <" Urban land ~ 5 8 0 CO CD n. USDA Natural Resources ThiS report shows only the major solis In each map unit Others may eXlsl ~ Conservation Service Tabular Data Version 4 Tabular Data Version Date 12/13/2005 Page 2 of 2 - - - - - - - - - - - - - - - - - - - Engineering Properties Lane County Area, Oregon [Absence of an entry rndlcates that the data were not eslimated] ClaSSification Fragments Percent passrng sieve number-- Map symbol Depth USDA texture LiqUid PlastiCity and soli name >10 3-10 limit rndex Unified AASHTO Inches Inches 4 10 40 200 In Pet Pet Pet 5 Awbng 0-7 Silty clay loam CL A-6, 0 0 100 95-100 90-100 85-95 35-45 15-25 A-7 7-29 Clay, Silty clay CH, A-7 0 0 100 90-100 90-100 80-95 55-75 25-45 MH 29-60 Clay loam, Silty clay loam CH, A-7 0 0 100 90-100 90-100 75-95 50-65 20-35 MH 26 Chehalls 0-13 Silty clay loam CL A-7 0 0 100 100 95-100 85-95 40-50 20-30 13-55 Silty clay loam, Slit loam ML A-4, 0 0 100 100 95-100 85-95 35-45 5-15 A-6, A-7 55-70 Loam, Silty clay, Silt loam CL A-6, 0 0 100 100 90-100 70-90 30-45 10-20 A-7 31 ~ CoburgQ 0-18 Silty clay loam CL A-6 0 0 95-100 90-100 85-100 80-95 30-40 10-15 -. cO" 18-53 Silty clay, Silty clay loam CL A-7 0 0 95-100 90-100 85-100 80-95 40-50 15-25 5" 0 53-65 Clay loam, Frne sandy loam, ML, A-4 0 0 90-100 85-100 70-90 40-65 25-35 NP-10 ~ 00 Loam SM en )> CD c " 32 0" ::0 :;0 3 ~ 0-18 Silty clay loam CL A-6 0 Coburg;:;: CD 0 95-100 90-100 85-100 80-95 30-40 10-15 ..... -=- ~ 18-53 Silty clay, Silty clay loam CL A-7 0 0 95-100 90-100 85-100 80-95 40-50 15-25 Q) ~ 53-65 Clay loam, Fine sandy loam, ML, A-4 0 0 90-100 85-100 70-90 40-65 25-35 NP-10 (::) <" (::) Loam SM CO CD a. Urban I rnd USDA Natural Resources ~ Conservation Service ThiS report shows only the major SOils In each map unit Others may eXist Tabular Data Version 4 Tabular Data Version Date 12/13/2005 Page 1 of 3 - - - - - - - - - - - - - - - - - - - Engineering Properties Lane County Area, Oregon ClaSSification Fragments Percent passing sieve number-- Map symbol Depth USDA texture liquid Plasticity and sOil name >10 3-10 limit Index Umfied AASHTO Inches Inches 4 10 40 200 In Pet Pet Pet 75 Malabon 0-12 Silty clay loam ML A-6 0 0 95-100 90-100 80-100 75-95 35-40 10-15 12-42 Silty clay, Silty clay loam CL A-7 0 0 95-100 90-100 85-100 80-95 45-50 20-25 42-60 Clay loam, Loam ML A-4, 0 0 95-100 85-100 70-100 60-80 30-40 5-15 A-6 76 Malabon 0-12 Silty clay loam ML A-6 0 0 95-100 90-100 80-100 75-95 35-40 10-15 12-42 Silty clay, Silty clay loam CL A-7 0 0 95-100 90-100 85-100 80-95 45-50 20-25 42-60 Clay loam, Loam ML A-4, 0 0 95-100 85-100 70-100 60-80 30-40 5-15 A-6 Urban land 79 McBee 0-24 Silty clay loam ML A-6 0 0 100 100 95-100 85-95 35-40 10-15 24-41 Clay loam, Silty clay loam, CL, A-6 0 0 100 100 95-100 80-95 34-40 10-15 0 Silt loam ML .., 41-62 Gravelly loam, Silty clay, Silt CL, A-6, 0 0 55-100 50-100 50-100 45-95 35-50 10-25 cg' loam GC A-7 ::l 0 Q) 95 (J) )> I.\) ...... Newber~ -c CD 0-14 Fine sandy loam SM A-2, 0 0 100 100 60-85 30-50 20-25 NP-5 :::c 3 ....., ;0 A-4 ;::+. ~ CD 14-65 Coarse sandy loam, Fine SM A-2, 0 0 75-100 75-100 40-85 25-50 20-25 NP-5 .- 0 Q) sandy loam, Sandy loam A-4 ....., CD (::) <" c::;) 96 CO CD Newber!; a. 0-14 Loam ML A-4 0 0 100 100 90-100 65-85 30-35 NP-5 14-65 Coarse sandy loam, Fine SM A-2, 0 0 75-100 75-100 40-85 25-50 20-25 NP-5 sandy loam, Sandy loam A-4 USDA Natural Resources ThiS report shows only the major SOlis In each map umt Others may exist. ~ Conservation Service Tabular Data Version 4 Tabular Data Version Date 12/13/2005 Page 2 of 3 - - - - - - - - - - - - - - - - - - - Engineering Properties Lane County Area, Oregon Map symbol ClaSSification Fragments Percent passing sieve number-- and soli name Depth USDA texture LiqUId PlastlClty Unified AASHTO >10 3-10 4 limit Index Inches Inches 10 40 200 In Pct Pct 119 Pct Salem 0-7 Gravelly slit loam CL-ML, A-4 0 0-5 55-80 50-75 45-75 40-70 25-35 5-10 GC-GM, GM, ML 7-26 Gravelly clay loam, Gravelly CL, A-2, 0 0-5 55-80 50-75 40-70 20-65 35-45 10-20 sandy clay loam, Gravelly GM, A-6, slity clay loam ML, A-7 SM 26-60 Very gravelly loamy sand, GP, A-1 0 10-15 25-55 15-50 10-35 Very gravelly sand, GP-GM, 0-10 0-14 NP Extremely gravelly sand SP, SP-SM Urban land Date Received: APR 2 4 2008 Or; . gmal SUbm;tt I a _____ USDA Natural Resources ~ . Conservation Service Tabular Data Version 4 Tabular Data Version Date 12/13/2005 This report shows only the major sOils In each map unIt Others may eXist Page 3 of 3 - - - - - - - - - - - - Water Features - - - - - - - Lane County Area, Oregon [Depths of layers are In feet See text for defimtlons of terms used In this table Estimates of the frequency of pondlng and floodmg apply to the whole year rather than to mdlvldual months Absence of an entry Indicates that the feature IS not a concern or that data were not estimated] Map symbol and sOil name HydrologiC group 5 Awbng D 26 Chehalls B 31 Coburg C Date Received: APR 2 4 2008 Original Submittal USDA Natural Resources ~ Conservation Service Surface runoff January February March Apnl May November December January February March November December January February March April May November December Month Water table Upper limit Ft o 0-0 9 o 0-0 9 00-09 00-09 00-09 o 0-0 9 00-09 1 5-2 5 1 5-2 5 1 5-2 5 1 5-2 5 1 5-2 5 1 5-2 5 1 5-2 5 Lower limit Surface depth Ft Ft >60 >60 >60 >60 >60 >60 >60 >60 >60 >60 >60 >60 >60 >60 Tabular Data Version 4 Tabular Data Version Date 12/13/2005 Pondlrlg Duralion Flooding Frequency Duration Frequency None Bnef Rare None Brief Rare None Bnef Rare None Bnef Rare None Bnef Rare None Bnef Rare None Brief Rare None Bnef Occasional None Bnef Occasional None Bnef OccasIOnal None Bnef Occasional None Bnef Occasional None None None None None None None None None None None None None None Thrs report shows only the major SOils rn each map unrt Others may eXIst Page 1 of 3 - - - - - - - - - - - - - - - - - - - Water Features Lane County Area, Oregon Water table Pondlng Flooding Map symbol Hydrologic Surface runoff Month and soil name group Upper limit Lower limit Surface depth Duration Frequency Duration Frequency Ft Ft Ft 32 ~ Coburg C January 1 5-2 5 >60 None None February 1 5-2 5 >60 None None March 1 5-2 5 >60 None None Apnl 1 5-2 5 >60 None None May 1 5-2 5 >60 None None November 1 5-2 5 >60 None None December 1 5-2 5 >60 None None Urban land 0 Jan-Dec None None 75 Malabon C Jan-Dec None None 76 Malabon C Jan-Dec None None Urban land 0 Jan-Dec None None 79 McBee C January 20-30 >60 None Bnef Frequent February 2 0-3 0 >60 None Bnef Frequent Date Received: March 2 0-3 0 >60 None Bnef Frequent Apnl 20-30 >60 None None November 2 0-3 0 >60 None Brief Frequent APR 2 4 2008 December 20-30 >60 None Bnef Frequent Original Submittal USDA Natural Resources ~ Conservation Service ThiS report shows only the major salls In each map unIt Others may eXIst Tabular Data Version 4 Tabular Data Version Date 12/13/2005 Page 2 of 3 - - 95 Newberg 96 Newberg 119 Salem Urban land - Map symbol and soil name - - Hydrologic group 8 B 8 D USDA Natural Resources ~ Conservation Service - - Surface runoff - Month January February March December January February March December Jan-Dec Jan-Dec - - - Water Features Lane County Area, Oregon Water table Upper limit Lower limit Ft Ft Tabular Data Version 4 Tabular Data Version Date 12/13/2005 - Surface depth - Ft Pondrng Duration - - - Flooding - - - Frequency Durabon Frequency Bnef OccasIonal Bnef Occasional Bnef Occasional Bnef Occasional Bnef Occasional Bnef Occasional Bnef Occasional Bnef Occasional None None None None None None None None None None None None Date Received: APR 2 4 2008 Onginal Submittal. ThiS report shows only the major sOils .n each map unrt Others may eXist Page 3 of 3 I I I I I I I I I I I I I I I I I I I Date Received: APR 2 4 2008 ) Orig.inal Submittal . Appendix C: City Drainage Basin Map "" - ""-, ::' (.-:;:/ ,/ - . -~ "-, > ',,'V" / .. , " \// mil-I. ~08/, __ _ " .. - -SMH: 016 . Rim 4:3Q:f!' 'OMH 10:7 ~ - , Rim. -4-30;;8 Deptn \ [) - .. Rim: 431 13' .. Oep~ I - 5.. Pro; ~t1-_( 75LQQ Depth: 3' .. - .. Pro r 00-006 '. -1 I~ _ Pro; P30_0Z,1 _00 502 - ~ - ~ ~ ,~ - - OM 102 5Q.3~ t!t _ .. f _ _--_IOl.......... 430 ~2' - J" '<...V--U'- ", epth 3 703- ~.- - _':'0:." "~FL42?_" " 351 yON 8'" ProF OSP_0291_00 330' 165 -<Dl~ ,.j.., 250 ^.. - - ~ "T --:"~~?:,":_.--~ --___ 40 CONlO" T~ '353-<.;tT'~AMr.rwhFjl;f-<~~8~D.Fl419.4 .. ~::!."..?-./_-- - y:HD J:lbL -_ -=::~ __ .. .. .... - ---~ .. - 235'..-- ~ -1L429 5 -';! DMH 1 1 , '",,:'_ 5Q1. ~ . .. Fl4291..--..-- - ..-- STRIP: .. ~Im..... 43 8 f>"_,, '\~ 'b - 3 \ - - - :.mI-;::; ..-- ON 8" 2 2 -=-Dept'" , -, _.. ~ '\ _ .. ~ CON ,8" 407 FL4291 C oRAEfil 4)2 ProJ: OSP _ 91_00 ~ ~(; \ " 9~ '--.._________. 1: ,{: :~.- - ~ ~~ - ~ .., .. -' ~ '<"'>0. 1, d - ~~.. '- '" 0467 .. I~ DMH 103 -:.. 0 .. ~12 431 ~5' / '" c -? .... r oC -~ -'- = .. " 7 , ~ --_~ ~~o ..-- .. ~06' - I r -. ~ "" ~-~-_. --~ ..;S ~ 4: 1; G; i ~ - -70" ~ ~ ,T'" --, ~--_.... ---.0 7~-~..2..-=-" ~O ~~: ..4-:~~~ 1~g"9' __~ /y ~.;..- .. M-'3 ! _0 --T .. 352 {'j;ih v 4" W .. '_ "'<,<:, - SMH _007...;;:>1 I ~ _'-"'::::"~mr~~ c _ u~Jlm--' ,Jr-- \ ~.oj:":::OO-:\)OO - ~ 1~ -~ -=-c .. 5Mb A f~ 1 L - - \ 3520 I Pro. 40~rn ~~' i~~:l~3:'~~ o-_.~-~--_/ - '\ --~' 0~ , ~-'-:~(;)N 12" l' ProF ..OO-~ '" -.- 1', 0 --l " , / ~ -_,"" J .. - I' __ L~\ 3521 ~ " -' j l' --, -'-_"-~' ""0,, --- (,I;:......, --- 1 . ---~ --------------r '- / -- -"" .. , , ' , '-, ' ff ~========== --ti~ -~-~_,' >:?-?~~ ~ ___,o~~, ~~D8 r 2~ 25(08' ---I. -- -_ '~~~--..-~ - -=====- -- -~ 50' jo" <' ~~grDb~a..oo_.. ~ ---- ~ - -, ~ ~- '. - _-----_ ./' Im-~'-="," - -u~, U~:R~~j\~),~~--~)\ ~,o~ - ~,~' ~~~<1a //' , 1,) /)) / BELTLINE RD"""") >-'-354 I-'-::~-' ~-'\ //0" . c:....L Ittal y / , / / // / ~ .-----: /" namal ,,~,...llI.1m , ' , / / I / - . 104 , ..----- ^I / - " /' 1 ,/ / " 5~6 0 434 pS ~-:- _-=:::::::-<- -: _n J. I / / 590 / / Depth 0 (~~ ~ .t", - ;/ 1~' -- ~~ - -~----,=-------- / ~o; 00-000 -f -'6'r--'s-7485 I __ ~ - =-==------- _=________ ,... __ ____ .. ,. ___ __ _ D _~ _ _ ~ =---= ,...---- '1,' ti/' ~.-:::::-:-~._- ..~: 0 --- :::::0.. :",-,~~ 4-3$"7 '-.~/ - \ / -~ --5MH 011 /00 ;Of ' ....---------.., I 0 ------ A4ll..~- .... - -= -"--=', / , " 'I' I Rm~344' ";}//~,!' ~~ ~~:'~~~l~;_-'~-^-'~_-~:\r,,~_/:'_ \,' \'-;~r,,~~g"60oi. I ) ..- .- I I 1 _ lJS":~ ------ ----~ -Q: ..._----........... ~, 1 , ---.J ~ "'-'--;1 _ -; .;:0 ~ i - , i r- '-- -0- I _~ l ._-,~ I ......._~~ '-Ji'=--' "- r ..' ,- ,', ....---........ ._~ , I I I I I I I I I I I I I I I I I I I Date Received: APR 2 4 2008 Original Submittal Appendix D: 1-00 Year Flood Plain - - \ .J. o --1 ~~ WI~ O2 ::> - w'o: LL c.. o if) I ~ (5, U~ U I >-J I ~,'- - - - - - - - - - - - ZONE X LANE COUNTY UNINCORPORATED AREAS 415591 GAME ~ ~ BEL TUNE ROAD )) - - - - - - 'itW~ APPROXIMATE SCALE IN FEET 500 0 500 =- I ~ I ~.~ II NAnONAL ~~D INSURANCE PROGRAMI r I . I FIRM i I! FLOOD INSURANCE RATE MAP "I LANE COUNTY, OREGON AND 1111, .1 INCORPORATED AREAS 'I I II 'j PANEL 1133 OF 2975 F I' i: (SEE MAP INDEX f:OR PANELS NOT PRINTEO} I Ii I :.! II I CONTAINS I COMMUNfIY EUGENE OTY Of SPftINGFlElO CITY OF LANE COUNTY I UNI""OAPORA TED AIIEAS ....., 1tl3 II 1,'1 :j~1 ItD II 11f.8 ,I.lIJII.I Federal Emergency Management Agen~ NUMBER PANEL SUfAX "10t22 1133 410692 1tl3 MAP NUMBER 41039C1133 F EFFECTIVE DATE: JUNE 2, 1999 This IS an official copy of a portion of the above referenced flood map ft was extracted uSing F-MIT On-Line This map does not reflect changes or amendments which may ha\fe been made subsequent to the date on the title block For the latest product information about Natlonall=lood Insurance Program flood maps check the FEMA Flood Map Store at WNw msc fema gOY '" I I I I I I I I I I I I I I I I I I I Date Received: APR 2 4 2008 Original submittal Appendix E: OOOT IOF Curve for Zone 7 ------------------- r RAINF ALL INTENSITY - DURA TrON - FREQUENCY CURVES 5.0 -I , ! - :- III '- 1111111:1 I -.::r:: - 0 4.0 - -- Zone 7 -. - ra: I ::J 0 - l>> 3.0 - - - I.\) - ~ en )> - ++t+++++H+H-H- ..... - c -0 CD - - - - CT :::c ;0 - - ""- 3 ~ ;:;: CD ~ - ..0- n 2.0 - ~ '" CD L - -- (::) <" - -- 1-- (::) :J - -- co CD 0 - -- .... 0- J::. - -- " ...... .... Cf) - --r CD --I ... .c. I" () 1.0 - ~= -I II . II c .- 0.9 . - >- 0.8 - = -..I I- --~~ - II) 0.7 - ==~~ =-: Z - - w 0.6 I- z 0.5 .J .J r 100 Yr. .:{ 0.4 moot ill ~ ~ 1..1... ~ 50 Yr. Z - .:{ - 25 Yr. 0:: 0.3 - 10 Yr. - -- - - - - 0.2 - - - 5 Yr. - - - - -- :1' 2 Yr. _L ~ 4-1+/-1.1-- - -- - -- - w._. ---- - -_. 0.1- -- ro. . 4 5 6 7 8 9 10 15 20 25 30 40 50 60 70 80 too 150 200 300 400 RAINF ALL DURA nON. Minutes I I I I I I I I I I I I I I I I I I I Date Received: APR 2 4 2008 Original Submittal Appendix F: Grassy Swale Curves ,- I I I I I I I I I I I I I I I I I I I Grassv Swale Exhibit 2-15 (Sheet 1) Swale Length at 1.5% Longitudinal Slope 180 I Bottom WIdth = 6' I 170 I - I Bottom Width;: 4' , I I 160 . _1- _ - I CD I ~ 150 I , . - - - f- - .r::. I I - 140 I en I - -- C I CD I ..J 130 I I ~ Swale Data ctI 120 3: Side slopes are 4'1 en 110 - - r - - Minimum length IS I , , , 100' 100 , , I I 90 I 0 0.2 0.4 0.6 0.8 1 Flow Rate, Q, cfs ---- -- - --- Date- Received: APR 2 4 2008 Original Submittal Stormwater Management Manual Adopted July 1, 1999; revised September 1, 2004 Page 2-72