One of California’s most extreme droughts since hydrologic recordkeeping began necessitated the Sunol Valley Water Treatment Plant Emergency Drought Reliability Improvements Project (SEDRI) using the Construction Manager/General Contractor (CM/GC) delivery method.
Monterey Mechanical provided design review, value engineering, constructability reviews, and planning/scheduling optimum sequencing of design completion to facilitate completion of work with the required timeframe. Major construction activity included replacing more than 16,000 ft. of chemical piping, critical valve replacements, repair of sludge lagoon decant system defects, and installation of a lagoon level monitoring system.
Work at the San Antonio Pump Station included increasing the pumping capacity by providing an additional 33 MGD of transfer capacity by converting an existing diesel driven pump to an electric motor driven pump
Challenges | Solutions
This was a fast-track, emergency project delivered using CM/GC. Key employees of the Owner (SFPUC), the design engineer (MWH Global), and Monterey had previous project experience working together. Employing this experience, an early team meeting established project goals and solidified a solid partnership from day one.
To ensure the required completion date of six months from notice to proceed was met, Monterey Mechanical collaborated with SFPUC staff and the design engineer to develop work packages, receive competitive pricing, and select qualified subcontractors.
The severe drought conditions necessitated an aggressive schedule. After developing the project schedule, Monterey determined it was not possible to complete the design effort prior soliciting bids as contemplated by all. Consequently, Monterey Mechanical scheduled completion of the design work to optimize construction sequencing.
It was also determined that if Monterey s Mechanical self-performed the chemical piping system replacement work, the time required to complete this portion of the design would be substantially reduced. This in turn allowed completion of the work within the timeframe in the aggressive schedule.
Another challenge was the requirement that all chemical piping had to be replaced without disruption to plant operations. To assure plant operations were maintained and met all regulatory requirements, Monterey Mechanical developed and installed temporary chemical conveyance systems.
Awards and Commendations
Associated General Contractors of California
- Constructor Award for Excellence in Project Management, Finalist 2016
- Constructor Award Excellence in Partnering, Finalist 2016