Project Location

Project Site Detail

General Study Area Map of Colma Creek and Plant

Lower Colma Creek Section 103 CAP

LOWER COLMA CREEK, CALIFORNIA
CONTINUING AUTHORITIES PROGRAM, SECTION 103

VIRTUAL PUBLIC MEETING

* This meeting was held on Wednesday, June 29, 12-1 p.m. Click here to watch the presentation, followed by discussion. 
* The U.S. Army Corps of Engineers and the City of South San Francisco (SSF), together with the SSF - San Bruno Water Quality Control Plant are partnering on a coastal storm damage reduction project for the Water Quality Control Plant and one of its pump stations. Our goal is to manage the risk that coastal flooding poses to this critical infrastructure, to maintain critical services, despite the increasing flood risk that is expected with sea level rise. Flood-inducing plant failure could result in raw sewage backups into homes and streets, as well as emergency sewage releases into Colma Creek. This project aims to reduce the risk of these damages, and increase the community’s resilience to flood risk.
** We want to hear from you! The study team will present an overview of the project and the tentatively selected plan. Download the project fact sheet to learn more. Also available in Spanish, Tagalog and Chinese versions. ** 

COASTAL STORM RISK MANAGEMENT FEASIBILITY STUDY

The U.S. Army Corps of Engineers San Francisco District (USACE), in collaboration with the City of South San Francisco as our non-federal sponsor, prepared a Draft Detailed Project Report and National Environmental Policy Act Environmental Assessment (DPR/EA) for the Lower Colma Creek Continuing Authorities Program Section 103 Project in South San Francisco, California.

On June 10, 2022, USACE released a letter announcing the availability of this Draft DPR/EA for public review and comment. The comment period is scheduled to end on Sunday, July 10, 2022. A virtual public meeting will be held on June 29, 2022. Hard copies of the DPR/EA will be available at the main branch of the public library in South San Francisco and at the public library in San Bruno.

Written comments may be emailed to Jeneya.A.Fertel@usace.army.mil or mailed to: Mr. Jeneya Fertel, 450 Golden Gate Ave, 4th Floor, San Francisco, CA 94102.

Lower Colma Creek Continuing Authorities Program Section 103 Project - Draft Detailed Project Report and Environmental Assessment [PDF]

Appendix A: FONSI Appendix B: Environmental
Appendix C: Cultural Resources Appendix D: Economics
Appendix E: Real Estate Plan Appendix F: Civil Design
Appendix G: Cost Engineering Appendix H: Hydrology, Hydraulics and Coastal
Appendix I: Geotechnical  


PROJECT LOCATION AND DESCRIPTION

The Lower Colma Creek Section 103 study addresses the problem of coastal flood risk to the South San Francisco Water Quality Control Plant (SSF WQCP) located in the City of South San Francisco, San Mateo County, California. A Federal Interest Determination prepared by the San Francisco District of the U.S. Army Corps of Engineers determined that if there is no project, the SSF WQCP facility is at risk of coastal flooding. The primary consequence of this would be loss of wastewater treatment services to more than 120,000 people, discharge of untreated wastewater into San Francisco Bay, and inundation damage to the facility.  Additionally, there could be a loss of wastewater treatment services to the service population until damage to the facility infrastructure could be repaired. Flood mapping indicates that flooding during a base year one percent annual chance exceedance coastal event is expected to cause flooding and damage the SSF WQCP infrastructure, which could potentially lead to service outages/closures that could have serious public health, safety, and environmental impacts due to untreated sewage backing up into streets, homes (basement toilets), or being released untreated into Colma Creek or the San Francisco Bay. Over time and with sea level rise, the risk of physical damage due to coastal flooding and associated service interruptions will increase. The Draft DPR/EA found that this flood risk can be significantly reduced without significant environmental impacts by construction of sheetpile floodwalls at the main WQCP and a ring wall at pump station 4.

FY 21 ACCOMPLISHMENTS
 

  • Completed a draft detailed project report and environmental assessment.
  • Resource agency coordination and outreach.
  • Continued planning level design and analysis.

ISSUES AND OTHER INFORMATION

  • The City of South San Francisco is the non-federal sponsor for this project.

CONGRESSIONAL INTEREST

  • 14TH District, Rep. Jackie Speier

POINT OF CONTACT

  • Project Manager, Robert Grimes, (505) 342-3389
  • Planner, Daria Mazey, daria.s.mazey@usace.army.mil
  • Deputy for Project Management, Edwin S. Townsley, (415) 503-6593

Updated on 29 June 2022

 

Project Contacts

  • Project Manager, Robert Grimes, (505) 342-3389
  • Planner, Daria Mazey, daria.s.mazey@usace.army.mil
  • Deputy for Project Management, Edwin S. Townsley, (415) 503-6593

Contact

Projects & Planning General Info
415-503-3674
450 Golden Gate
San Francisco, CA 94102