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Headworks Facility Project

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Construction is Underway!

The staging of materials and equipment in the parking lane on the southside of Evans Avenue between Rankin Street and Quint Street continues until 2023.

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Headworks Facility Project
 Project Materials
Fact Sheet - English
Fact Sheet - Spanish
Fact Sheet - Chinese
30 Day Construction Notice
3/2018 Business Briefing
• 1/2018 Presentation
11/2017 Presentation

Headworks Process Diagram
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   • Call: (415) 551-4SEP (4737)
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Built in 1952, the Southeast Treatment Plant (SEP) treats 80% of the City’s wastewater, but many of the SEP’s aging facilities have passed their useful lives and need to be upgraded and modernized.

The first step in the wastewater treatment process occurs at the Headworks facility where debris (such as baby wipes) and grit (like sand) are removed from the wastewater stream. This process is critical to protect downstream equipment, help control odors, and ensure that the SEP can operate efficiently. The existing 35-year old Headworks facility is at the end of its useful life and is unable to adequately perform these functions.


Project Purpose and Need

The Headworks Facility Project (Project) will construct a new Headworks facility, modify the Bruce Flynn Pump Station, and construct a new odor control structure. The Project will provide the following benefits:
  • Continue to protect public health and the environment.
  • Minimize odors using advanced odor control equipment.
  • Meet current seismic standards to better protect the facilities from earthquakes.
  • Improve operational reliability and flexibility.
  • Increase efficiency of treatment processes and protect downstream equipment.
  • Achieve the adopted Levels of Service goals for wastewater treatment.

View the construction fact sheet to the right for more details.


Headworks Facility Map March
The SEP is shown above and the buildings in green and yellow are the Headworks Facility and the Bruce Flynn Pump Station.


Construction Overview

Starting in spring 2018, the San Francisco Public Utilities Commission (SFPUC) and the contractor, Sundt/Walsh, a Joint Venture, began construction with an anticipated duration of approximately five years, which will include:
  • Establish a contractor work and staging area along Evans Avenue
  • Modifications to Bruce Flynn Pump Station and facilities inside the SEP
  • Modifications to existing underground combined sewer system in the vicinity of Rankin Street and Evans Avenue
  • Shifting the four traffic lanes on Evans Avenue to establish safe construction zone
  • Demolition of old Headworks Facility on Evans Avenue
  • Construction of new Headworks Facility in same area as old facility
Headworks Staging Map March
No parking along Evans Avenue, between Rankin and Quint streets. Pedestrian access and four lanes of traffic will be maintained.
 Headworks Construction Timeline March

What to Expect During Construction
  • Noise, vibration, dust, and traffic impacts in the work zone.
  • Residents near the work zone will maintain access to their homes and businesses.
  • Construction Hours: Monday through Friday from 7:00 a.m. to 8:00 p.m. with occasional weekend work from 7:00 a.m. to 8:00 p.m. Residents and businesses will be notified in advance when weekend, nighttime, holiday or 24-hour work is required.
  • Transportation Impacts: Streets will be open for traffic throughout construction, with optional detour routes available. Delays should be expected. No impacts to Muni service are expected at this time.
  • Parking Impacts: Staging of materials and equipment in the parking lane on the southside of Evans Avenue between Rankin Street and Quint Street continues. This condition is anticipated to remain until 2023.
  • Sewer Service: No interruptions to sewer service will occur during construction.
  • For more information about construction activities at the Southeast Treatment Plant, visit

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 or for information on upcoming meetings, visit


San Francisco’s Arts Enrichment Ordinance Compliance requires two percent of the gross estimated construction cost be invested in public art. For more information, please visit impact/programs/public-art.



Last updated: 7/17/2020 9:56:26 AM