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HomeMy WebLinkAboutParcel Map 13889 Parcels 1-4 Hydrology & Hydraulic Calculations Michael L'eneSh . Professional Civil Engineer & Land Surveyor , I!. Civil Engineering. Land Surveying. Land Planning .~ Hydrology And Hydraulic Calculations For . ~I~ ~1-4 RECEIVED NOV 1 8 1998 CITV OFTEME:l.:ULA ENGINEERING DEPARTMENT PM 13889, Via EI Delora Existing 24" CMP Culvert In the City of Murrieta, CA Prepared For: Noel Paine PO Box 3093 Agana, Guam 96910 (671) 646-7132 Prepared By: Michael L. Benesh Professional Civil Engineer & Land Surveyor 404 South Live Oak Park Road Fallbrook, CA 92028 (760) 728-6938 TO 88" REVISe:-D 404 South Live Oak Park Road . Fallbrook, CA 92028 . Phone & FAX 1760) 728-6938 \ . . PM 13889, Via EI Delora - Hydrology & Hydraulic Study Existing 24" CMP Culvert 1 00. Year Storm Flow Drainage area is currently undeveloped but calculations are based upon an assumed ultimate development of approximately 1 DU/Acre. All drainage northerly of Estero Street is currently directed to Estero Street via gutters & terrace drains, and then along Ormsby Road to Santiago Road without entering the existing CMP Culvert. Drainage Area:....................................... 8.0 Acres Soil Type: ............................................... B (Plate C-1.60) Length: ................................................... 1000' Height:.. .......... ..... ......... .... ............ .... ...... 77' Development: ......................................... 1 DU/Acre Tc........................................................... 12.3 Min. (Plate 0-3) 1..............................................................3.11 InlHr (Plate 0-4.1, Murrieta - Temecula) C ............................................................ 0.72 (Plate 0-5.2) Q=(0.72)(3.11)(8.0)= 17.9 cis Determine Adeauacv of existina 24" CMP to handle 100 Year Storm Flows: Culvert Calculator Given: Shape ............................................... Circular Number of Barrels ............................ 1 Solving for ........................................ Headwater Chart Number .................................. 2 Scale Number .................................. 1 Chart Description ............................. CORRUGATED METAL PIPE CULVERT Scale Decsription ............................. HEADWALL Flowrate ...........................................17.9 cis Manning's n ......................................0.024 Roadway Elevation .......................... 1228.2 fl Inlet Elevation .................................. 1223.0 fl Outlet Elevation ................................ 1221.2 It Diameter ..........................................24 in Length .............................................. 60 fl Entrance Loss .................................. 0.5 Tailwater .......................................... 1.5200 fl (On - due to outlet pipe being elevated.) Computed Results: Headwater ........................................ 1227.37 ft < 1228.2 OK Slope ................................................0.0300 ftIfl Velocity............................................ 6.9670 fps Messages: Outlet head> Inlet head. Computing Outlet Control headwater. Outlet not submerged. Z- . Normal Depth: 16.8858 in Critical Depth: 18.2923 in Normal depth <='critical depth. Flow is supercritical. Since culvert is supercritical no profile generated. Inlet depth = average of critical depth and barrel height. Headwater = inlet depth + entrance loss + friction loss + exit loss. Headwater: 1227.37ft < 1228.2 OK 2 . :? o o Hydrology Map · PM 13888 Scale 1" . 200' , " $"'">', D i "1' "~'\' 1 , " ~ i'" '\ ,.--- ~. -- LEGEND - SOU GROUP BOUNDARY " SOILS GROUP: DESIGNATION ~ HYDROLOGIC SOILS GROUP MAP FOR TEMECULA -:S RCFcaWCD - - - - - HVrJRnl nr;v ~;IANIJAI .......... .,,^^ 't~ LIMITATIONS: L . Tc I. Maximum lenGth = 1000 - .-1000 90 2. Moximum allo = 10 Acres 5 ~ - 900 80 ~ - ~ .. J::L -70 g 6 'i 60n - u r~ :.: .. c( - " IS 300 ~ 60 coo .!! 700 c: ~ _ zoo 7 - - c .. ~ 100 - c: 0 "- c: .. N S .. E 50 ~ .- 80 E 600 ... 0 - . 68 8 ~ 0 c: 0 -;c;: 5 0; ", ,- ;g 0; .. CA;~'~ '3 > > I ~ .. ---- -~- ~ ' C' '0'. 9 0 ~ (I) - ! ~ c 20 500 .. ;; - ~ u c::.. . ~ 35 ______t!. i . 10 'ij ., d E - .. .. {t .. It -- . ~ .. ..!i. IM-.... II ... t-~_... (I) 400 ~ 30 UndevllDlled _L.." _ .. ., ~ ..~-- ;;. ,~ Good Coyer ..:; . L !.: .!: ! - 0 350 25 '~ !~ ! ::> Undevelopea 0 .- h .6 ,4.j:i: 0 c: Fair Cover .6 ~ 'f :0: :J , ;; i.. :~ 300 20 Undeveloped 0 .3 ,,'l.y It. "". t:.' .5 Poor Cover ~ ." ~ .Z ./ -: ::" 19 - 11~3'~ ... ~ 18 Sinole Family ~ ./ 0 .~ 17 5O.!l /~/ ~ 250 - 16 0/4 Acre) .. .. 18 .5 ..J .€ - 19 ~ c: 15 Commerciol 90'~ ~ .c. 0 20 - 'Z 14 (Po~ u ... E! c: c: c: 200 13 // '" .2 ., - ~ ..J c: .. f ., 12 \'1:\ ... g ~. L~ - 8 II c: ~/" 25 .. . u ... .-l(( c: 0 0 KEY (J 150 9 - , ., L-H-Tc-K--Tc ... 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If'lDtfloWl 011........ o . ~ . ~ oJ .. o .. .. . ~ oJ .. . . ": . .. .. " oJ on o on ": . l' ., oJ .. o .. .. . ~ ... .. STANDARD INTENSITY - DURATION CURVES DATA PLATE 0-4.1 (4 of 6) 1 . 1.00 4 6 1.0 .j . ,1-. I rt i 'T i 9 .. "T .9 , ! I I. <- .8 t- .8 t: , I r--t--T" -r .7 .7 .1 . .6 .6 .5 .5 .4 ,4 .3 -' ,2 .t -+- .2 COEFFICIENT CURVES SOIL GROUP-B COVER TYPE -URBAN LANDSCAPING AMC-n (RUNOFF INDEX NUMBER 56) .I r- "--H-H+ +'l- > r+ RAINFALL INTENSITY IN INCHES PER HOUR. +4-i-+-T~ ~.t+~m'i ~-~.. :j-~~Y.~ ~ ~ _; Ll-L_LL..L.... .....' \:~;: o - + -rl " i +~ --r--l-~-~-+: I I - 'W"j, ()o T"T;--o-'T", 2 3 4 5 6 PLATE 0-5.2 B