Stormwater Resource Plan Draft & Feedback Form

What is the San Mateo Countywide Stormwater Resource Plan?


The San Mateo Countywide Stormwater Resource Plan (SRP) is a comprehensive document that represents a significant transformation in watershed resource planning and stormwater runoff management. The SRP was developed by the City/County Association of Governments (C/CAG) of San Mateo County through its Countywide Water Pollution Prevention Program (Countywide Program), representing the twenty cities and towns and the County of San Mateo. The SRP is being prepared through a collaborative effort with stakeholders and the public and tailored to the specific stormwater runoff issues in the region. The main goals of the SRP are to identify and prioritize opportunities to better utilize stormwater as a resource in San Mateo County through a detailed analysis of watershed processes, surface and groundwater resources, input from stakeholders and the public, and analysis of multiple benefits that can be achieved through strategically planned stormwater management projects. These projects aim to capture and manage stormwater more sustainably, to reduce flooding and pollution associated with runoff, improve biological functioning of plants, soils, and other natural infrastructure, and provide many community benefits, including cleaner air and water and enhanced aesthetic value of local streets and neighborhoods.


Through Senate Bill 985 (Pavley, 2014), SRPs are now required in order to compete for state grant funds from any voter-approved bond measures. The San Mateo Countywide SRP is intended to fill that role for future stormwater management projects in the County. 


San Mateo Countywide Stormwater Resource Plan Approach


The San Mateo Countywide SRP takes a watershed-based approach to prioritizing stormwater management projects. The screening and prioritization process is based primarily on critical watershed characteristics and processes, including land use, soil hydrology, land slope, and other relevant landscape features.  Opportunities to manage stormwater are prioritized through consideration of overall community benefits and the potential to co-locate stormwater capture projects with other currently planned and future capital improvement projects. Because ideal conditions for a suitable stormwater management project vary by type and size of project, projects were screened and prioritized in three overall categories: regional stormwater capture projects, green streets, and onsite stormwater management.  Regional projects capture runoff from large drainage areas and typically require larger parcels for siting infrastructure, green streets capture drainage from individual roadway segments, and onsite stormwater management projects only capture and manage runoff generated on a particular parcel or site. 


The SRP is a collaborative model for addressing the opportunities and challenges in stormwater management in San Mateo County. The SRP includes GIS data layers and locally planned projects from C/CAG’s member agencies. C/CAG’s member agencies also provided important guidance and feedback while the plan was under development. As part of the public engagement component of the SRP, C/CAG has scheduled three public workshops in January 2017 to solicit public and stakeholder feedback on the SRP.


Web Viewer


C/CAG created a web viewer to enable interested parties to view the results of the screening and prioritization process.  The viewer shows locations and relative rankings of regional stormwater capture, green street, and onsite stormwater management opportunities.  Instructions for using the viewer can be accessed here


Status of the Plan


A draft version of the SRP, which was developed in coordination with C/CAG’s member agencies and includes 22 detailed project concepts from across the County, was approved by the C/CAG Board of Directors for release as a public review draft on December 8, 2016.  The draft plan is now available for public comment through January 13, and C/CAG will host a series of public workshops in early January 2017, as detailed below. The C/CAG Board of Directors will consider adopting the final plan at its February 9, 2017 meeting.  This deadline is to meet State Water Board requirements for submittal by March 1, 2017.


Review the Draft Stormwater Resource Plan and Provide Comments


DRAFT San Mateo Countywide Stormwater Resource Plan


DRAFT – APPENDIX A: Characterization of Imperviousness Study


DRAFT – APPENDIX B: Results of Quantitative Prioritization of Projects


DRAFT – APPENDIX C: Conceptual Design Fact Sheets


DRAFT – APPENDIX D: Bayfront and Vista Grande Canal Projects


DRAFT – APPENDIX E: Stakeholder List


Please provide your comments by completing a comment form regarding the plan (limited to five comments).  If you intend to submit more extensive comments on the plan, we recommend downloading this spreadsheet-based comment form that can be emailed to with a subject line of “Comments on SRP.” 


You can also submit formal comment letters by e-mail to (subject line “Comments on SRP”) or mail to C/CAG at 555 County Center 5th Floor, Redwood City, CA 94063, ATTN: Reid Bogert.


The deadline by which C/CAG must receive comments is 5 PM on Friday, January 13, 2017.


Upcoming Public Workshops


C/CAG invites you to attend public workshops for the San Mateo Stormwater Resource Plan. The workshops will provide an opportunity to learn more about the plan, ask questions, and offer feedback.


A flyer with details on the workshops can be downloaded here.


NOTE: The workshops have passed but you can view the SRP workshop presentation.


Thurs, Jan 5, 2017

6:30-8:30 PM

Arrillaga Family Recreation Center, Cypress Room

701 Laurel Street

Menlo Park, 94025

Click here to register!


Mon, Jan 9, 2017

6:30-8:30 PM

Chetcuti Community Room

450 Poplar Avenue

Millbrae, 94030

Click here to register!


Tues, Jan 10, 2017

6:30-8:30 PM

Pacifica Community Center 540 Crespi Drive

Pacifica, 94044

Click here to register!


For more information, please e-mail or 650-599-1433.  


Web SRP Comment Form 


Comment form limited to up to five comments per individual.  If you intend to submit more extensive comments on the plan, we recommend downloading this spreadsheet-based comment form  that can be emailed to with a subject line of “Comments on SRP.” 


Update: Comments via the web comment form are closed as of 5pm on Friday, January 13, 2017.