HomeMy WebLinkAboutParcel 4 PM 6972 Sewer Study - Signed LetterAllen & Meacham Commercial Project
SEWER STUDY
2
Objective
The primary objective of this analysis is to quantify the sewage discharge from the
proposed commercial development
Existing Facilities
The site is located outside City of Bakersfield’s limits - within Kern County’s jurisdiction
and is currently undeveloped. It is bound on the west by single-family residences, on the
north by a single residence with M-1 zoning, on the east by Allen Road, and on the south
by San Joaquin Veterinary Hospital. An existing 18” sewer main line runs along Allen
Road with an 8” sewer stub to the west to serve this site. The existing Allen Road sewer
line is owned and maintained by the City of Bakersfield. As part of the CSA 71
agreement and the sewer will serve letter provided by the City of Bakersfield, the City
has agreed to serve this County property.
Proposed Project
The zoning for the site is Office Commercial (CO). The 6.25 net acre site will consist of
4 – 6,000 sf office buildings adjacent to Allen Road and 3 – 12,600 sf office buildings
along the west boundary.
Design
The proposed development will be served by the 18” sewer located in Allen Road with
two connection points (see Sewer Study Exhibit). The southern point of connection has
an existing 8” sewer line stubbed to the west. The northern point of connection will have
to be at the existing manhole. Sewer lines onsite were designed according to the 2013
California Plumbing Code.
The total peak sewage discharge generated by the proposed project was determined
using the City of Bakersfield’s Subdivision Design Manual for commercial development.
The equation for peak discharge for a commercial land use is 0.010 cfs/gross acres.
Results
The peak discharge generated by the proposed project is 0.075 cfs. An 8-inch pipe
flowing at eight-tenths depth at a slope of 0.5% can convey 1.0 cfs.
Allen & Meacham Commercial Project
SEWER STUDY
3
Vicinity Map
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____________________________________________________________Not to Scale
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Channel Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc.Thursday, Apr 7 2016
8-inch Sewer Flowing at 0.8 Depth
Circular
Diameter (ft)= 0.67
Invert Elev (ft)= 100.00
Slope (%)= 0.50
N-Value= 0.011
Calculations
Compute by:Known Depth
Known Depth (ft)= 0.54
Highlighted
Depth (ft)= 0.54
Q (cfs)= 1.000
Area (sqft)= 0.30
Velocity (ft/s)= 3.31
Wetted Perim (ft)= 1.48
Crit Depth, Yc (ft)= 0.48
Top Width (ft)= 0.54
EGL (ft)= 0.71
0 1
Elev (ft)Section
99.75
100.00
100.25
100.50
100.75
101.00
Reach (ft)