HomeMy WebLinkAboutAdmin Site Plan 07-065HYDROLOGY ANAL`
HYDRAULICS CALCUL,
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ADMINISTRATIVE SITE PLAN NO. 07-065
COMMERCIAL BUILDING
16867 ARROW BLVD., FONTANA, CA. 92335
APN: 0191-274-40
PREPARED BY:
HP ENGINEERING, INC.
1465 CRESTVIEW ROAD
REDLANDS, CA. 92374
(909)799-6797
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INTRODUCTION
STUDY LOCATION:
This study area consist of approximately 0.33 acres of already developed commercial
land being surrounded by commercial establishments to the north, east, south and west. It
is located at the southeast corner of Arrow Blvd. and Nuevo Street. The project may be
accessed via Sierra Avenue going north from Interstate 10 freeway, thence west to Arrow
Boulevard to the project site
REPORT OBJECTIVE:
The entire area of this project already have a commercial building, parking lot, and
landscaping. The objective of this report is to determine the basic hydrologic response of
the proposed development to both onsite and offsite storm runoff and to established storm
drain facility design criteria for this localized unit for review by the City of Fontana. The
project is a "Redevelopment" in nature.
HYDROLOGY:
The rational method hydrology system used on the analysis of the subject site is the San
Bernardino County Hydrology Manual dated August, 1986
SUMMARY:
The project study area is less than an acre, so small that a simple Rational Method
Formula, i.e., Q=CIA can be used to determined the flow in 100 -year frequency. The
property east of the project naturally drains to the south and towards the alley and to
Valencia Avenue and does not have impact to the project. North and West of the project
are fully improved streets. South of the project is a commercial building which drains to
Nuevo Street and to the Alley which does not have impact to the project. The on-site flow
therefore will only be used for sizing of concrete open channel.
Applying the formula: Q=CIA , C=0.90, 1=1.45 (100 -yr.), A=0.33 Ac.
Q = 0.43 CFS
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EX. MED14N
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ARROW BOULEVARD
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EXISTING AUTO SUPPLY STORE
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ID
SCALE 1"=20'
W
RIGHT OF WA
GROUP POUNOAAY
GROUP DESIGNATION
14DARY OF INDICATED souRc]e
COUNTY
kele 1130.000
..........
lAll MIP IlPlOOV11O "GM U'-' '11N GIIIIARONG"
SCALE REDUCED BY 1/2
HYDROLOGIC SOILS GROUP MAP
FOR
SOUTHCENTRAL AREA
HP ENGINEERING, INC.
CIVIL ENGINEERING & LAND SURVEYING
1465 CRESTVIEW ROAD
REDLANDS, CA. 923747
(909)799-6797
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rectangular Open Channel
------------------------
Flowrate ..................
Velocity ..................
Depth of Flow .............
Critical Depth ............
Total Depth ...............
Base Width ................
Slope of Channel ..........
X -Sectional Area ..........
Wetted Perimeter ..........
AR^(2/3) ..................
Mannings 'n' ..............
0.430
1<--------(
2.00') ---------- >1
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fps
* * * *
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*
*
* * * *
*
*
*
*
*
*^^^Water
Surface ( 0.121)^^^*
sq. ft.
*
*
*
*
*
*
*
*
*
*
*
*
*
* * * * *
* * * * * * * * * * *
*
*
* * * * *
* * * * * * * * * * *
*
Rectangular Open Channel
------------------------
Flowrate ..................
Velocity ..................
Depth of Flow .............
Critical Depth ............
Total Depth ...............
Base Width ................
Slope of Channel ..........
X -Sectional Area ..........
Wetted Perimeter ..........
AR^(2/3) ..................
Mannings 'n' ..............
0.430
CFS
1.819
fps
0.119
feet
0.113
feet
0.119
feet
2.000
feet
0.500
%
0.239
sq. ft.
2.239
feet
0.054
0.013