FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Acting Director of Engineering
SUBJECT:
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GISLER-RED HILL INTERCEPTOR AND BAKER FORCE MAIN REHABILITATION, PROJECT NO. 7-65
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Receive and file Bid Tabulation and Recommendation for Gisler-Red Hill Interceptor and Baker Force Main Rehabilitation, Project No. 7-65;
B. Approve a project budget increase of $11,100,000 for Gisler-Red Hill Interceptor and Baker Force Main Rehabilitation, Project No. 7-65, for a new total project budget of $55,500,000;
C. Award a Construction Contract to Steve P. Rados, Inc. for Gisler-Red Hill Interceptor and Baker Force Main Rehabilitation, Project No. 7-65, for a total amount not to exceed $44,706,000; and
D. Approve a contingency of $4,470,600 (10%).
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BACKGROUND
The Orange County Sanitation District (OC San) owns and maintains regional conveyance facilities in the City of Costa Mesa, including the 30 and 33-inch diameter Gisler-Red Hill Interceptor, dual parallel 42-inch diameter Baker Force Mains, and the Main Street Pump Station, which is located in the City of Irvine. The Baker Force Main and Main Street Pump Station carry flows from large watersheds of Irvine, Tustin, and Costa Mesa as well as required interagency flows from Irvine Ranch Water District. The facilities range in age from 30 to 55 years. The facilities are not capacity deficient.
RELEVANT STANDARDS
* Comply with California Public Contract Code Section 20103.8, award construction contract to lowest responsive, responsible bidder
* Achieve less than 2.1 sewer spills per 100 miles
* Protect OC San assets
PROBLEM
Condition assessments of the Gisler-Red Hill Interceptor indicated corrosion in many of the manholes, as well as multiple cracks in the vitrified clay piping. Condition assessments of the east Baker Force Main indicated corrosion ...
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