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Folsom Area Stormwater Improvement Project

  Project Materials 
Alternatives Analysis Report


Project Purpose and Need

The Folsom Area Stormwater Improvement Project is a part of the San Francisco Public Utilities Commission's (SFPUC) flood resilience efforts under the Sewer System Improvement Program (SSIP).

The low-lying Inner Mission neighborhood surrounding 17th, 18th and Folsom Streets has been historically subject to flooding during moderate to heavy storms. This capital project will construct new infrastructure to improve collection system capacity to manage stormwater for the level of service (LOS) storm, which has a 20% possibility of occurring in a given year. Additional project information is available in the final Needs Assesment and Alternatives Analysis Report located here.

Project scope:

  • Construct a 3,500 linear foot, 12-foot internal diameter tunnel from the vicinity of Alameda/Treat Streets to the vicinity of 7th/Berry Streets.
  • Construct nearly 12,500 linear feet of sewer pipes to divert wastewater flow towards the new tunnel infrastructure. 
  Click on the image above for a larger view.

Project status: The project team is currently working towards finalizing the Conceptual Engineering Report in Spring 2018. The SFPUC is soliciting a Tunnel Design Consultant through a Request for Proposals to aid in the design phase, which will begin shortly after the Conceptual Engineering Report is finalized.

Request for Proposal for Consultant Design Services: Parties interested in the Request for Proposal for consultant design services please click here: link to be provided after advertisement, anticipated March 2018). 

About the SSIP

The San Francisco Public Utilities Commission (SFPUC) recently launched the Sewer System Improvement Program (SSIP), a 20-year citywide investment to upgrade our aging sewer system and provide a more reliable, sustainable, and seismically safe system now and for future generations. The SSIP includes a series of facility upgrades at the Southeast Treatment Plant (SEP) located in the Bayview neighborhood of San Francisco. Click here to learn more about the SSIP.


Last updated: 2/26/2018 2:44:40 PM