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HomeMy WebLinkAboutSW5220301_Stormwater Report_20220330Stormwater Management Report Deliverance Church SEA Job # 5091 Summey Engineering Associates, PLLC PO Box 968 Asheboro, NC 27204 Phone: 336-328-0902 Fax: 336-328-0902 Email: mack@summeyengineering.com L1 1 ` 26447 1 ►►►►1I7111119i1�1, Deliverance Church SEA,PLLC Proiect Overview: Deliverance Church will consist of a 8,056 sf place of worship located on the North side of US Hwy 64 approximately 1,500 LF East of the intersection of Ellington Road/Stockyard Road and Us Hwy 64 in Chatham County, Siler City, NC. The project parcel is approximately 6.61 acres and is entirely wooded. The soils on site are classified as Hydrologic Soil Group (HSG) D. The site does not lie within a special flood hazard area per FIRM Panel 3710874200J. There is a perennial stream located on site that runs from north to south through the majority of the parcel. There is also a small intermittent stream located off of the perennial stream. There are approximately 78,649 sf of jurisdictional wetlands on site. The entire site drains to an unnamed tributary of Blood Run Creek, surface water classification C, that is part of the Cape Fear River Basin. See the Wetland Delineation Report dated April 5m, 2019 for more information. Stormwater Requirements: This project must comply with stormwater rules set forth by the Town of Siler City, NC. The maximum built upon area for low density is 7%. This project will have a proposed built upon area density of 6.96% making this a low -density project per the Town of Siler City Unified Development Ordinance Article XVI. This project must also comply with NCDEQ stormwater quality regulations. The maximum BUA for NCDEQ Low Density Project is 24%. The proposed BUA of 6.96% is well below the 24% BUA limit. Therefore, this project will have no permanent stormwater control measures designed to treat for water quality or runoff attenuation. A 100 ft buffer is required along all perennial streams and a 50 ft buffer is required along all intermittent streams. This buffer has been provided and shown on all plan sheets. There is approximately 381 sf of disturbance inside the stream buffer to connect the sanitary sewer service to the existing manhole located inside the stream buffer. No impervious surfaces or grading has been proposed inside the stream buffer. Stormwater Treatment: As a low -density project, no permanent stormwater control structures are proposed as a part of this project. The project will utilize grass lined runoff conveyance channels and sheet flow to provide water quality protection. Two permanent grass swales are located at the western boundary of the project. The remaining runoff that does not drain to the permanent swales will sheet flow across the proposed grass and existing wooded areas prior to leaving the site. The project as proposed, meets all the stormwater requirements set forth by the Town of Siler City and NCDEQ. Refer the to "Attachments" for more information. Deliverance Church SEA,PLLC Attachments: - DA-1 Existing Site Area Map - DA-2 Proposed Site Area Map - DA-4 Diversion Ditch Drainage Area Map - DA-5 Roadside Ditch Drainage Area Map - USGS Topo Map - NRCS Hardbound Soils Map - Hydrologic Soils Group Map - FIRM Panel 3710874200J - Aerial - Diversion Ditch Calculations 1 / 1 / �//o / �l � �/t11 � /1 �W � W W �pW! W W W W W W W\ \ 1 1 L / x � � \ �• f l �1/ ✓� l �� i \h \��"'/``�~\p] \ W W Wp v�II5*gl 0W W .4W -1"w W DRAWING LEGEND W 1 � � \ � � �� PERMANENT DIVERSION DITCH jo '� l�� W W W W o L LLL DRAINAGE AREA BOUNDARY �\\> IMPERVIOUS AREAS r �, PpINg\ ,7A.:V1iY DIVERSION DITCH 1: � l � > J� S ( 1 l) 1 4�� W W W W W W Wo. \1 �� \ GRASS: 26,939 S.F. (0.62 AC) IMPERVIOUS: 1,604 S.F. (0.04 ACC 0 � 1 "ram mi l\ TOTAL AREA: 28,543 S.F. (0.66 AC) W _ \\ C= 0.43 w= W o o U o 0 1= 7.52 z� z )� C A= 0.66LLJ z �'� € DIVERSION DITCH 2: r � GRASS: 23,430 S.F. (0.53 AC) J M D1VER.l!.77l1ON /% I �W�W W W W ( ) I IMPERVIOUS: 12,866 S.F. (0.30 AC) � W = 3 / Dr LJ� // W W W W� v (I j \ Q Q EE ����������+++++ffll ///► s FFE-60I.5,� TOTAL AREA: 36,296 S.F. (0.83 AC) V �J _ s W W w I ` C- 0.58 1 1= 7.52 A= 0.83 DIVERSION DITCH 2 nm LLCM �\ Plal CFS= 3.62 Om BOOK/PACE 1 ss/1o83 PUTOM/PAM' SEA Job No: �-5C91 W za Z z �0>> '59 593 � i; u ° o Date: Wgg H 2C22 m MHr 00 CA ~ 7 — ZHG u, , = Drawn by. -� us 64 WEST Checked by: HMS �,—� — Sheet r- p_ ___� _ -o / ( J\� �� �( _ ` ` — 0' 100' 200' 300' > u-o DA�4 DRAWING SCALE � Q O V � O N / t51 : 8Y82W W .4 W W W U \ W j t)l Ill Cf11N]tANC! GNR � Cfflg% W W oxNr;Hx: PEN7EOOSTAL NCTCRY 7ELPlE oe 1711/90e 1 P Io e1as3 r pN: s7ssosaue�s 1 W C J ogdO eooN/r sa./7ss I \�7 , w� wt '70 SF N m - —4L ' 771 > LL o � � Q O V � O DRAWING LEGEND PERMANENT DIVERSION DITCH DRAINAGE AREA BOUNDARY IMPERVIOUS AREAS 6 Q Z� ROADSIDE DITCH: ¢ � oC 5 �; GRASS: 60,327 S.F. (1.38 AC) Q u U o z IMPERVIOUS: 16,429 S.F. (0.38 ACC UJI Q v w Z 0 4 ��E� 0 � � z TOTAL AREA: 76,756 S.F. (1.76 AC) U 0 Q w W 0 O 7 L ") ° z o J ¢ zz-) o W Q 1 ` V 0 SEA Job No: �-5C91 �z _ z o Date: Wgg H 2C22 000 _ Drawn by. Z H G Checked by: HM5_ Sheet 0' 100' 200' 300' immmmm DA�S DRAWING SCALE � UVYV U.S. DEPARTMENT GEOLOGICAL SURVEYERIOR science for a cnJnginug world 79.30' 35.45' '36O1nT `37 °38 ar57mc� N 2 12 w „5 42'30' ,,5 m a Io "44 35-37'30" me aax,r Map y► US Topo 27AIS SILER CITY QUADRANGLE NORTH CAROLINA-CHATHAM CO. 7.5-MINUTE SERIES 25' -22AIS '44 '45 '46 35.45' "57 � � PROJECT o r� €`n,Tr, 3r s _ cnre7 — S3�LEIi � O W c? O sLer etc N,p t2iu I ` /. � _ - lm,r D o� 8 o3J i 9 � � O o xrv�x° QED a° o on O a ark r O 5 o � 0 ( � , ° c➢;' O \ � q✓ ��� IPvi c9� 9.9 e53 42AIS �''52 In K. "49 40' 1A48 21 go "44""N 35-37'30" 79.30' '36 `37 `38 11 e00 000 FEET a38 27'30" °48 41 1 42 `43 26' `44 "45 `46m°'"E 79-22'30^ Produced by the United States Geobgicel Survey SCALE 1:24 000 ROAD CLASSIFICATION xe3) al TC ,op oo oo o ,000 2000 n0o<il*NAO o�mopo y oaa oc or = 10000 foofod<sNa'oaooa,al Sy,le. of,9x3 . — — —s R 4WD eof ooforioe proafo L,oa :. nowemo.0eDf issioo Before uTR sw aFIFES FEET ouoa NLos" N Roofo us Roofo O s m Roofo oFcuxanox aT 11—R of sxE FT Im aeon ........................... NAI9, Aoeosf 2014 ONzm Namos ys Ha,oeapnv Nafooa Ha,oeapnv Dafao, afooa EooafoofDafasoz BZoLodual,. ms wfa°asFwS Nafo°a wrfa°as °er°fon 1977 z04 NORTH nMERaN VERT cn Tn o Naf ooa Goospafpa 9sopeamusTopooroa�fsfaoaara zo,, Amr"aafaf ea— afea MIT ms proaers aarc ve,sooae.,9 a C,o 4ssroaas IT 3 Silk op �cerorHy s scooorrcaeryNE 2cnf°o 7 x z nw SILERCITY, NCa nmso-m 2016 �z z UNITED STATES DEPARTMENT OF AGRICULTURE ' NATURAL RESOURCES CONSERVATION SERVICE —30'00" IF�3XLIY CHATHAM COUN"Il', NORTH CAROLINA � STLER CITY QUADRANGLE ° SHEET NUMBER 8OF18 tes seen J9" 2230" m m ]9'30'00" �3 This sail survey --piled by t, U.S. Depargnent of AgriculWr,, N.—I Resources Canservatian Service and y+asp` cooperating agencies. Base maps are orTophotagrmhs 0 prepared by the U.S. Departlnentof lhelnteriar, GedogicA Survey, ham 19]&1399 aerial photography. Adminislra— boundatles were acquired from the State of North Carolina Boundaries may have been edited to cantorm uilh features represented on the publicagon oIth0phet,graphy or 10 e hence tl�e darlty of the sdls lnformatlan. Nortli American Datum of 1—qN AD83). GRE80 Spheroid 1000�meter gcks: Universal Transverse Mercater, zone f ] Coordinate ggrid gcks and land division d-, if shovm, are pprodmatdy positioned. Digital data are available for this quadrangle. 79-27'30" ]9 26'00" sc ALE 1:24000 MILE a caassxaws SILER CITY, NORTH CAROLINA 7.5 MINUTE SERIES SHEETNUMBER 8 OF 18 Soil map delineadons extending beyond the dashed white quadrangle neatline are tar reference only and are induded on adjacent map sheets. e�NJ a ry 636010 35° 44' 14" N 35° 44' 1" N Hydrologic Soil Group —Chatham County, North Carolina 636060 636110 636160 636210 636010 636060 636110 636160 636210 in Map Scale: 1:2,010 if printed on A portrait (8.5" x 11") sheet. Meters N 0 25 50 100 150 Feet 0 50 100 200 ?00 Map projection: Web Mercator Conermordinates: WGS84 Edge tics: lfrM Zone 17N WGS84 usoA Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey m 636310 0 35° 44' 14" N 0 35° 44' 1" N 636310 N 9/24/2018 Pagel of 4 Hydrologic Soil Group —Chatham County, North Carolina MAP LEGEND Area of Interest (AOI) 0 Area of Interest (AOI) Soils Soil Rating Polygons 0 A 0 A/D 0 B 0 B/D C 0 C/D 0 D 0 Not rated or not available Soil Rating Lines r 0 A r 0 A/D B B/D N 0 C r 0 C/D r 0 D r 0 Not rated or not available Soil Rating Points 0 A 0 A/D 0 B 0 B/D ❑ C 0 C/D 0 D ❑ Not rated or not available Water Features Streams and Canals Transportation — Rails ­0 Interstate Highways US Routes Major Roads Local Roads Background D6 Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Chatham County, North Carolina Survey Area Data: Version 20, Sep 26, 2017 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: May 19, 2015—Oct 16, 2017 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. usoA Natural Resources Web Soil Survey 9/24/2018 Conservation Service National Cooperative Soil Survey Page 2 of 4 Hydrologic Soil Group —Chatham County, North Carolina Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI CmB Cid-Lignum complex, 2 to 6 percent slopes D 11.8 100.0% GnC Georgeville-Urban land complex, 2 to 10 percent slopes B 0.0 0.0% Totals for Area of Interest 11.8 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long -duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink -swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. USDA Natural Resources Web Soil Survey 9/24/2018 Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group —Chatham County, North Carolina Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff.- None Specified Tie -break Rule: Higher USDA Natural Resources Web Soil Survey 9/24/2018 Conservation Service National Cooperative Soil Survey Page 4 of 4 s I � x t . ' OF f z�nt�am 4 Mt 4 3'00 N I o o ;.� ast(9�9yl�f ®Lp j v �91 ( 1 �Sf(91P' Y BS1J 11TLR] oo VIA , Nollukuny ell ALL q �It _,I spm aW9s�r6Y9 *� bones All erating Teo ical Statc FLOOD HAZARD INFORMATION SEE FIS REPORT FORZONE DESCRIPTIONSAND INDEX MAP THE INFORMATION DEPICTED ON THIS MAP AND SUPPORTING DOCUMENTATION ARE ALSO AVAILABLE IN DIGITAL FORMAT AT HTTP://FRIS.NC.GOV/FRIS -Without Base Flood Elevation (BFE) Zone A. V, A99 With BFE or Depth sane AE, AO, are, VE, are SPECIAL FLOOD HAZARD AREAS — Regulatory Floodway HAZARD — 0.2 % Annual Chance Flood Hazard, Areas of 1% Annual Chance Flood with Average g Depth LessThan One Foot orWith Drainage Areas of Less Than One Square Mile zone x — Future Conditions 1% Annual Chance Flood Hazard zone x OTHER AREAS OF — Area with Reduced Flood Risk due to Levee FLOOD HAZARD See Notes Zane x OTHER — Areas Determined to be Outside the AREAS 0.2% Annual Chance Floodplain 2onex Channel, Culvert, or Storm Sewer Accredited or Provisionally Accredited GENERAL Levee, Dike, or Floodwall STRUCTURES . . . . . . . . . . . . . Non -accredited Levee, Dike, or Floodwall BM5510, North Carolina Geodetic Su rvey bench mark BM55100 National Geodetic Survey bench mark BM5510 '�> Contractor Est. NCFMP Survey bench mark o�ra.z— Cross Sections with 1% Annual Chance Water Su rface Elevation (BFE) s8) - - - - - Coastal Transect ------- Coastal Transect Baseline Profile Baseline Hydrographic Feature OTHER Limit of Study FEATURES Jurisdiction Boundary NOTES TO USERS For Information Intl a s'boutthls ma vallable rotlucts a 'tetl with Ibis FlRM:,Illdin q e p,' p g hlsmbc versbns Of mis FIRM h0wm Omer r0tluc[s Orme N'e0n'I rloga msw'nce," a eaI please all me FEMA Map Inf—t , eXch'nge at 1-e]]-FEMA -MAP (1-e77-336-2627) orrvlsitthd FEMA Map Service Center web sib at htgh.//msc fem'.gmv. An'ceomp'nying Fbotl Insuance St tly report, Letter of Map Revision (LOMR) or Letter of Map Amentlment (LOMA) revising DID1111 of this panel, Intl tliglbl versions of this FIRM may be available. Visit the North Carolina FlootlplainMapping Program websib at Utp//www.ncfbotlm con or cenbc[ the FEMA Map Service Center. Communites annexing lantl on atljacent FIRM panels must obb,, a current copy of the atljacent panel as well as the curent FIRM Index. These may be o,db,bd tlirecty fmm the Map Service Center atthe number Ilsbtl above. For community Ina aunn,,wme map tl'td, referb me Flootl bsuance SNtly ap0rtbrmisjuhstlld0n. TI tleb-,,b If flootl bsuance Is'v'o'be In be 10mmu11ty, contaetylur bsuance agent 01 at me N't0n'I Flootl Insuance Pmgam at 1-800-638 6620. Base map Inmrnaton shown on this FIRM was pmvitletl In tligibl format by the North C'mlln' Flootlplain Mapping Pmgam(NCFMP). The source of this Inm 3t,an be tlebrminetl f,m the metatlab'vallable In me tliglbl FLOOD tlatabase Intl In the Tech31 Support Dab Notebook TARN). ACCREDITED LEVEE NOTES TO USERS. If'n'ccretllbtl Ievee note appears on thls panel chb,kwltlh your baI iuuY b of cha h tllevlfp pm tltl(Hh yexceetlthe permce h eI p tl E g'' A PI on h v (,) h p ,ding pmbcron. To m[g fl tl k restl I k ,Amp rty ntl Itl ce g tl tlerflootl 111,311, tlfl tlp ofing h p ctiv .Fro f nfl tl I,tb,b,tbd p'rtes h Itl h FEMA-b UDIP1 vw f g v/bu g fpl,tl dhtm PROVISIONALLY ACCREDITED LEVEE NOTES TO USERS If P d IIyAm tlL (PAL)n,tb appears on this panel, check with your IOaI community m obt- more Information, such as the estm'tetl level of Ipmtectln pmvitletl (which may exceed be 1_peaent-annua3chance level)— Emergen Action Plan, on the ees,,lemlk shown 3s pmvting pmtecto, Tom'bbin'ccatll't0n, me levee owner or community Is levee b submit the tlata Intl tlocome-bb, necessary b comply with the 65.10 of the NFIP regN3tons. If me toh""ty 0' owner does not provme the nece—, tlata Intl tlocumenbeon or If the tlata Intl tlocumenbeon pmvitletl Indc3tes the levee "tem doe, not comply with Section 65.10 requirement,, FEMA will revise the flood hazard Intl risk Inmmaton for this area to reflect de 3—etlibton of the levee ry,tem. To mitg'te flood risk In R' dual risk areas, pmpehy ownea Intl resment— encouaged b considereuutl bsuance Intl fioodpmoeng r other protective measures. For more IU-3ton on flood Insuance, Interesbtl p'rtesshoultl visit the FEMA Website at ht[p://.fema g0v/busines U,/rode-shim LIMIT OF MODERATE WIVE ACTION NOTES TO USERS Forsome coasblFlood, zonesthe AE Zone ategory has been tllvitletl by a Limit of Modeate Wave Action (LiM WA). The LiM WA represent, the appmma bte 3ndwa limit of the 15-foot breaking wave. The effects of wave h3z3,d, between the VE Zone Intl the LiM W1 (or between De shoreline Intl the LIM W1 for areas where VE Zones are not,dentified) will be smilar b, but less seven than those In the VE Zone. Limit of Moderate Wave Action (LiMWA) COASTAL BARRIER RESOURCES SYSTEM (CBRS) NOTE This map may —elude approximate houndd-,0fthe CBRS fo—f0mabonal purposes only. Flood Insuance is not mg'o'be w¢hb CBRS areas to, tub e, matare newly hoot orsub,bnt,blly Improved on o, dDe, me dbte(s) l,ted 0n the nap. Fur more lnbmat0n see hbp>/www rwsg0vm'bIb[c0nsem't0n/c0'sbI b'merhmn, he FIS Report, or all heUS. Fish Intl VNltllife Service Customer Service Center at 1-800-344WILD . ® CBRS Area 0 Otherwise Protected Area SCALE eMao A ra State Plane Proection Northh Ca.ollinin Feet Zone 3200 Datum. PAD 1983 Horizontal NAVD 1988 Vertical 1 inch = 1,000 feet 1:12,000 0 500 1,000 2,000 Feet Meters 0 150 300 600 PANEL LOCATOR i I pLpMpNCE COUNTY i i I i ORANGE COUNTY I i DURHpM COUNTY 1®®®wrer1r' fre®®� WYfilflttil'YfIW®®® ®®�YfY G NORTH CAROLINA FLOODPLAIN MAPPING PROGRAM NATIONAL FLOOD INSURANCE PROGRAM '_OOD INSURANCE RATE MAP `j L NORTH CAROLINA ao v o F-+ PANEL8742 ' CD ��C panel Contains: L COMMUNITY CID PANEL SUFFIX r^I CHATHAM COUNTY 3]0299 8742 .. SIT CITV,T NTOF 370058 8742 .. L v _v U_ v Z MAP NUMBER 3710874200J '*a...� MAP REVISED 02/02/07 • " Pentecostal , Victory Temple g F 111y �Y. { L r _=-'-3`WNCA - - liurch.Of w , z 1 old 4 kGf Hog Slat In nc, 9/7/22, 1:10 PM ECMDS 7.0 NORTH AMERICAN GREEN CHANNEL ANALYSIS > > > Diversion 1 Name Diversion 1 Discharge 2.13 Channel Slope 0.01 Channel Bottom Width 2 Left Side Slope 3 Right Side Slope 3 Low Flow Liner Retardence Class C 6-12 in Vegetation Type None Vegetation Density None Soil Type Clay Loam (CL) North American Green 5401 St. Wendel-Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 >Fax 812.867.0247 www.nagreen.com ECMDS v7.0 S150 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Depth 1ManningsNj' Shear Stress Shear Stress Factor Remarks Pattern S150 Straight 2.13 cfs 1.29 ft/s 0.48 ft 0.055 1.8 Ibs/ft2 0.3 Ibs/ft2 6.01 STABLE D Unvegetated Underlying Straight 2.13 cfs 1.29 ft/s 0.48 ft 0.055 1.96 Ibs/ft2 0.2 Ibs/ft2 9.59 STABLE D Substrate \\,111111111/I// A R �� Q ..O�.SS'..��. SEAL 5D747 ff'+ `CRY H . G1' 11111 00\\� https://ecmds. com/project/148635/chan nel-analysis/206226/show# 1 /1 9/7/22, 1:09 PM NORTH AMERICAN GREEN CHANNEL ANALYSIS > > > Diversion 2 ECMDS 7.0 North American Green 5401 St. Wendel-Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 >Fax 812.867.0247 www.nagreen.com ECMDS v7.0 Name Diversion 2 Discharge 3.62 Channel Slope 0.01 Channel Bottom Width 2 Left Side Slope 3 Right Side Slope 3 Low Flow Liner Retardence Class C 6-12 in Vegetation Type None Vegetation Density None Soil Type Clay Loam (CL) S150 Phase FReach I Discharge Velocity Normal Mannings N Permissible Calculated Safety Remarks Staple Depth Shear Stress Shear Stress Factor Pattern S150 Straight 3.62 cfs 1.55 ft/s 0.61 ft 0.052 1.8 Ibs/ft2 0.38 Ibs/ft2 4.73 STABLE D Unvegetated Underlying Straight 3.62 cfs 1.55 ft/s 0.61 ft 0.052 1.96 Ibs/ft2 0.25 Ibs/ft2 7.89 STABLE D Substrate \, CA F? SEAL - 50747 = JJfI ��R�iH,•tG��```; https://ecmds.com/project/148635/channel-analysis/206248/show 1 /1