HomeMy WebLinkAboutMINUTES - 06231992 - 1.24 TO: BOARD OF SUPERVISORS AS THE GOVERNING BOARD OF CONTRA COSTA COUNTY
FLOOD CONTROL AND WATER CONSERVATION DISTRICT
FROM: J. MICHAEL WALFORD, CHIEF ENGINEER
DATE: June 23, 1992
SUBJECT: San Ramon Creek Bypass Project
SPECIFIC REQUEST(S) OR RECOMMENDATION(S) &BACKGROUND AND JUSTIFICATION
I. Recommended Action:
APPROVE Flood Control District Zone 3B financial participation in the corrective work for the
San Ramon Creek Bypass channel cover. Said participation shall not exceed 50% of the repair
contract costs.
II. Financial Impact:
The estimated cost to'Zone 3B.is $400,000.
III. Reasons for Recommendations and Background:
During the construction of the reinforced concrete cover for the San Ramon Creek Bypass
channel, the Corps of„Engineer's Resident Engineer agreed to a contractor suggested change
in work permitting sawed construction joints in the cover slab in lieu of the construction joint
detail shown on the plans. The reason for the change Was to expedite the construction process.
The Resident Engineer failed to secure clearance for the change from the structural engineer
who designed the cover.
Continued on Attachment: X SIGNATURE:
RECOMMENDATION OF COUNTY ADMINISTRATOR
_ RECOMMENDATION OF BOARD COMMITTEE
APPROVE OTHER
SIGNATURE(S):
ACTION OF BOARD ONJUN 2 3 1992 APPROVED AS RECOMMENDED OTHER
VOTE OF SUPERVISORS
✓ UNANIMOUS (ABSENT 37-- )
AYES: NOES:
ABSENT: ABSTAIN: I hereby certify that this is a true and correct copy.of
an action taken and entered on the minutes of the
MFK:drg Board of Supervisors on th�e date shown.
a\MFK:SRCB023.T6 ATTESTED: JUN c1992
e er
Orig. Div: Public Works (Administration) PHIL BATCHELOR,Clerk of the Board
cc: County Administrator of Supervisors and County Adminlstrator
County Counsel _
County Auditor Controller By 6ALAA ,Deputy
Public Works-Acctg.
Public Works-Flood Control
Corps of Engineers,via PWD
I
San Ramon Creek Bypass Project
/. 2y
June 23, 1992
Page Two
III. Reasons for Recommendations and Background (Cont'd):
The cover as constructed does not meet the original design criteria. The joints have cracked
completely through the cover slab. The rubbing between cover slabs causes significant noise,
and the lack of sufficient load transfer across the construction joint reduces the load carrying
ability of the cover to a substandard legal highway load.
The cover is a non-federal local cost item. At the request of the District, the Corps of Engineers
agreed to include the cover construction in the project at 100% local cost. Because the cover
is a non-federal cost item and it was included in the project as a favor, staff recommends that
the District participate in the cost of the corrective work even though the.decision to change the
construction joint was,lsolely the Corps of Engineers'.
IV. Consequences of Negative Action:
All costs would have to be born by the federal government, this may lead to their refusing to do
the repair.
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