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

Headworks Facility Project

Headworks Art March
The SFPUC & SF Arts Commission are commissioning artwork for the new Headworks Facility
Construction is Here!

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.

Visit for Southeast Construction Updates!


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
9/2017 Presentation
8/2017 Presentation
3/2017 Presentation
Headworks Process Diagram
We want to hear from you! Contact us with your SEP construction questions:

   • Call: (415) 551-4SEP (4737)
   • Email:
   • After hours: Dial 3-1-1

Stay Informed! 
For more information, sign up for Southeast Construction Updates at

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.
  • A city construction inspector will be on-site during work hours. Inspectors typically wear a yellow safety vest and hard hat.
  • Construction Hours: Monday through Friday from 7:00 a.m. to 8:00 p.m. 
  • Nighttime and Weekend Work: Construction could occur as needed on Saturdays and Sundays from 7:00 a.m. to 8:00 p.m. Standard SFPUC practice requires advance notification to area residents and businesses prior to weekend and nighttime activities.
  • Holiday and 24-Hour Work: If holiday or 24-hour construction is needed for critical facility connections, advance notice will be provided.
  • Transportation Impacts: Streets will be open for traffic throughout construction, with optional detour routes available. Delays should be expected.
  • 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.
  • Muni: No bus impacts are expected at this time.
  • Sewer Service: No interruptions to sewer service will occur during construction.

About the SSIP

The Sewer System Improvement Program (SSIP), is a 20-year citywide investment to upgrade our aging sewer system and provide a more reliable, sustainable, and seismically safe system now and for generations to come. For more information on SSIP, please 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: 1/7/2020 2:15:03 PM