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About the Project

The Pinole-Hercules Water Pollution Control Plant (WPCP) is located along the shoreline of San Pablo Bay at 11 Tennent Avenue within the city limits of Pinole. The WPCP was constructed in 1956 to treat wastewater generated only by the City of Pinole homes and businesses. In 1971, the Cities of Pinole and Hercules entered into a joint use agreement, which included expansion and facility upgrades to the WPCP. The plant is currently administrated by the Pinole-Hercules WPCP Joint Powers Authority (JPA) and treats wastewater from both cities to secondary standards.

Presently the treated wastewater from the WPCP is discharged to San Pablo Bay through a deep water outfall in San Pablo Bay. During the heavy rainfall periods the rainfall diluted WPCP effluent is also discharged from a shallow wastewater outfall in San Pablo Bay. The existing WPCP has a Water Quality Control Board permit providing for an average dry weather flow capacity of 4.06 million gallons per day (mgd) and a maximum daily wet- weather flow capacity of 10.3 mgd. The proposed new improvements at the WPCP will provide for Water Quality Control Board permit expansion to a maximum daily wet-weather flow capacity of 14.59 mgd.

The WPCP improvements will cost in the neighborhood of $48,000,000 to be shared equally by Pinole and Hercules, including approximately $4,500,000 in administrative and construction management costs. The projected construction schedule is:

  • Call for Bids: October 1st, 2015
  • Bid Opening: December 10, 2015 @ 10:00 a.m.
  • Bid Award: Feb/March, 2016
  • Start of Construction: April, 2016
  • Construction Completed: December, 2018

Please direct all questions to mwarriner@carollo.com or call (925) 932-1710. Do not send questions to the PlanetBids website.


Project Documents

Neighborhood Meetings

Bid Procedure Documents

Technical Specifications

Project Labor Agreement


Prequalification Process - Completed

Public Works is accepting Statements of Qualifications for the Pinole-Hercules Water Pollution Control Plant Upgrade Project due at 4:00 p.m. on June 18, 2015.

If you wish to submit your qualifications, you must be added to our list of potential bidders so that we can send you addendums to the document. To be added to our list of potential bidders please send us an email giving us the following information:

1.Company Name

2.Contact Person

3.Company Address

4.Email Address

5.Phone and Fax numbers

email:pubwks@ci.pinole.ca.us to let us know.

Notice Inviting Statements of Qualifications for Upgrades

Addendum Number 1

Addendum Number 2



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