HomeMy WebLinkAboutTract 7044 7043 Drainage Study(03
BAKERSFIELD
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September 25, 2019
McIntosh & Associates
2001 Wheelan Court
Bakersfield, CA 93309
RE: Drainage Study for Tract 7044
Dear Mr. Neptune:
We have completed review of the revised drainage study for Tract 7044, dated
September 6, 2019. As a result of our review, we approve the study with the following
comments:
1. Per the recommendations in the soils report by Krazan and Associates dated
February 8, 2008, the sump shall be overexcavated to at least 35 feet below
existing ground level, to approximate elevation 308.00, and backfilled with free
draining sand to sump bottom elevation 328.00. Prior to sump acceptance a
letter from the soils engineer will be required verifying that the sump has been
constructed in accordance with the recommendations in the soils report.
2. Prior to acceptance of the sump a percolation test shall be performed by filling
the sump once to the design water level under the supervision of City staff to
record the rate of infiltration to the satisfaction of the Water Resources
Department. If the sump drains sufficiently rapidly that it is infeasible to fill to
design water level that will be considered evidence of sufficient percolation and
the sump test will be deemed complete.
3. This study sizes a shared drainage basin for both Tracts 7043 and 7044, but
hydrology and hydraulics only for Tract 7044. A future study will determine
hydrology and hydraulics for the Tract 7043 storm drain system.
4. As the portion of the sump located within Tract 7043 is also required to be
constructed in order to provide drainage for Tract 7044, all necessary easements
and dedications for the complete sump shall be obtained prior to approval of
the grading plan for Tract 7044.
5. Please provide an electronic copy of the calculations. As a back up to the hard
copy submitted, the City is asking all the engineering firms to submit a digital PDF
copy.
UA
Public works Department
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1501 Truxtun Avenue, Bakersfield, CA 93301
1-326-3724 FAX: 651-852-2120
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Should you have any questions, please contact Alerik. Hoeh at (661 ) 326-3576.
Very truly yours,
NICOLAS FIDLER
Public Works Director
B:
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Manpreet Singh
Civil Engineer III -Subdivision
Cc: Reading File
Tract 7044 File
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