HomeMy WebLinkAbout4270-18F - L_J I F L_ f e-VVU - I J � 4- V
40
PROPOSED SHEEr FlOW DIRE00N
RATIONAL
HYDROLOOY ANALYSIS SUMMARY,
SUB -AREA "A pp (NORTHEAST PART OF THE PARKING ADDMON)
APPROX. WATER RUNOF'F,Q 10 -YR GENERATED BY SUB -AREA 'T =3.8 CFS
THIS RUNOFF WILL FI -OW SOUTHEASTERLY IN SHEEr FLOW PAT7ERN TOWARDS
THE Exis-nNG DRAiE_WkT_fHAT BORDERS ALONG THE SOLM4 SIDE OF THE
PROJECT SITE. PLEASE SEE CMLD COMPUTER PRINTOUTS ATTACHED TO THIS
SUMMARY FOR MORE DErAlLS
THE 18 CFS RUNOFF' IS DISCHARGED TO THE SAID EXISTING DRKEWAY AT niE
REVISIONS DATE BY
PROPOSED 30 -FOOT DRNIMAY (90 -D -E-12 HEREON). ACCORDING TO THE
zi�
AITACHED FLOWMASTER COMPUTER PRINTOL0, THE RUNOFF AT THE PROPOSED
Am
DR*-VAY HASS APPROX. RUNOFF SURFACE AT 0.05' ABOVE THE PAVEMENT
SURFACE, AND VELOCffY OF 2.5 FPS.
SUB -AREA "B" (SOUTHWEST PART OF THE PARKING ADDMON)
SUB -AREA 'T IS RELATIVELY SMALLER THAN THAT OF SUB -AREA T. THEREFORE,
WATER RUNOFF Q GENERATED BY SUB -AREA *B" IS LESS THAN THAT OF
I 0 -YR
THE SUB -AREA '*A'*. THIS SUB -AREA '*B* RUNOFF WILL FLOW SOUTHERLY WITHOUT
OBSTRUCTIONS IN SHEET FL PAlTERN TOWARDS DiE ffl0_N6_DRNlE-WAY THAT BORDERS
ALONG THE SOLMi SIDE OF THE PROJECT SITE. THERErORE, THE RUNOFF WILL HAVE.
PROJECT'DESCRIPTION
NEGLJGIBLE WATER DEPTH (MUCH LESS THM THAT OF THE 0.05t DEPTH OF 111E
SUB -AREA 'OA'* AS-MM-fONED HEREON). THIS SUB -AREA t*Bw RUNOFF WILL JOIN
Avg,
VETERANS PARK WEST -PARKING L,OT
THAT OF THE SUB -AREA AND THE COMBINED RUNOFTS WILL CONflNUE TO
FLOW EASTERLY IN 714E EXISTING DRAWAY AS DESCRIBED HERE -ON TOWARDS
ADDITION
CUL-DE-SAC 017 THE EXISTING DRIVEWAY.
FONTANA, CA
SUB -AREA "C" (EXISTING W. FIELD)
PREPARED FOR:
THE PROJECT PROPOSES MISC. ADDMON OF SIDEWAtX, SHELTER, ETC. TO THE
AREAS SURROUNDING 7HE BALL FIELD THAT EXISTS TO THE EAST OF lliE PARKING
ADDMON. THE ADDED ITEMS DO NOT OBSTRUCT nlE CURRENT FLOW GENERATED
BY THE SUB -AREA T% THEREFORE, THE C(Ai�NfSHEEr FLow PATTERN OF THE
CITY OF FONTANA
STORM WATER RUNOFF IN THE SUB -AREA *C" WILL BE UNCHANGED.
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