Skip to page body Home Customer Service How To Environment Projects & Programs About Us

Alameda Creek Recapture Project

Project Information
August 2017
June 2019
Cost $29 Million
Project Phases Design & Environmental Review
Additional Information

The information shown reflects the current forecast information published in the latest WSIP Quarterly Report.

Project Materials

Project Fact Sheet-November 2016
Presentation to Sunol CAC 11.16.16

Need more information? Contact:

Betsy L. Rhodes
Phone: 415.554.3240

Sign up for our Sunol Valley Regional Blog to follow the projects in that area.




At the link below please find a copy of the Responses to Comments document on the Draft Environmental Impact Report (EIR) for the above-referenced project. This document along with the Draft EIR, constitute the Final EIR on this project.

The Planning Commission will receive public testimony on the Final EIR certification at the June 22, 2017 hearing. Please note that the public review period for the Draft EIR ended on January 30, 2017; any comments received after that date, including any comments provided orally or in writing at the Final EIR certification hearing, will not be responded to in writing.

The Planning Commission does not conduct a hearing to receive comments on the Responses to Comments document, and no such hearing is required by the California Environmental Quality Act.

Interested parties, however, may write to Commission members or to the President of the Commission at 1650 Mission Street and express an opinion on the Responses to Comments document, or the Commission’s decision to certify the Final EIR for this project.

If you have any questions concerning the Responses to Comments document or the environmental review process, please contact Chelsea Fordham at (415) 575-9071 or

Project Background

The San Francisco Public Utilities Commission (SFPUC) owns and operates the Hetch Hetchy Regional Water System that delivers drinking water to 2.6 million people in Alameda, Santa Clara, San Mateo, Tuolumne and San Francisco counties.

In 2008, the SFPUC adopted the Water System Improvement Program (WSIP), to repair, replace, and seismically upgrade the Hetch Hetchy Regional Water System. The Alameda Creek Recapture Project (ACRP) is one component of the WSIP. The Calaveras Dam Replacement Project (CDRP), another WSIP project, is designed to restore the historic storage capacity of Calaveras Reservoir. CDRP is currently in construction with completion scheduled for spring 2019.

As a part of the regulatory requirements for future operations of Calaveras Reservoir when the new dam is completed, the SFPUC agreed to implement bypass and instream flow schedules for Alameda and Calaveras creeks, to be protective of Central California Coast steelhead below the Alameda Creek Diversion Dam (ACDD) and Calaveras Dam.

The ACRP would recapture water that will be released from Calaveras Reservoir and/or bypassed around the ACDD during future operations of Calaveras Reservoir. The recaptured water would maintain the historical contribution from the Alameda Watershed to the SFPUC regional water system, in accordance with the SFPUC’s water rights.

Quarry Pit Map

Proposed Project

The proposed project would recapture a certain volume of water that would be released and bypassed at Calaveras Dam and Alameda Creek Diversion Dam. The recaptured water would be pumped from an existing quarry pit (Pit F2) in the Sunol Valley, downstream of the compliance points for the bypasses and releases below the ACDD and Calaveras Dam, respectively. The project would utilize the natural infiltration of water into the ground in the vicinity of Pit F2, and the recaptured water would be transferred to the SFPUC water system via either the San Antonio Reservoir or the Sunol Valley Water Treatment Plant. The recapture operation would be conducted within the SFPUC’s existing pre-1914 appropriative water rights.

The ACRP would require construction of several improvements in and around Pit F2. All construction activities would occur on SFPUC-owned property, and no construction would occur in the bed, bank, or channel of Alameda Creek. The proposed project components would include:
  • Four turbine pumps mounted on barges that would float on the water surface of Pit F2 and be attached to the shore using a mooring system;
  • Four flexible discharge pipelines extending from each turbine pump to a new pipe manifold located onshore;
  • A new pipeline connection between the pipe manifold and the existing Sunol Pump Station Pipeline;
  • Throttling valves and a flow meter;
  • An electrical control building; and
  • An electrical transformer and overhead power lines.

Operation of the ACRP is dependent on the instream flow schedules that will be implemented as part of the future operation of Calaveras Reservoir. The SFPUC used the Alameda System Daily Hydrologic Model (ASDHM) framework to estimate the volume of water the SFPUC would recapture. The volume of water bypassed and released, and subsequently available for recapture, would vary from year to year. The estimated average annual recapture volume is 7,178 acre-feet per year, with a range of 4,878 to 9,161 acre-feet per year. On average, the total annual volume of water that infiltrates into Pit F2 would exceed the volume of water recaptured.

Anticipated Schedule
  • Publication of the Draft Environmental Impact Report (EIR): November 30, 2016
  • Draft EIR Public Hearing in San Francisco: January 5, 2017
  • Draft EIR Public Comment Period: November 30, 2016 - January 17, 2017
  • Certification of the of Final EIR: June 2017
  • Construction: Fall 2017-Spring 2019 (18 month construction period)

Questions about the Project or the WSIP in general: Betsy L. Rhodes,, 866-973-1476.
Last updated: 6/8/2017 10:41:18 AM