†To obtain Power Point versions of PDFs marked with a dagger, please contact the CCCWP at or 925-313-2360.

*To obtain Word or Excel document versions of documents marked with an asterisk, please contact the CCCWP at or 925-313-2360

The latest Municipal Regional Stormwater Permit (MRP 3.0) Provision C.3.j. requires Bay Area municipalities to implement their Green Infrastructure (GI) Plans.  The previous Permit (MRP 2.0) required municipalities to develop these GI Plans to outline how Low Impact Development drainage design will be included in storm drain infrastructure. 

In 2023 and 2024, CCCWP Permittees held a series of workshops to review the most up-to-date and most relevant GI planning and design resources in the region and to develop an updated resource inventory for Contra Costa Permittees to use when implementing their GI Plans. 

The following resources may be useful during GI project planning, design, construction, and maintenance.  Please note that these resources may need to be further adapted for local conditions; you will need to check with your local jurisdiction’s stormwater representative with questions.

Planning Guidance

Stormwater C.3 Guidebook
Contra Costa Clean Water Program
Ninth Edition, 2024

Green Infrastructure Design Guide
San Mateo Countywide Water Pollution Prevention Program
Second Edition, 2020

San Mateo Countywide Sustainable Streets Masterplan
San Mateo Countywide Water Pollution Prevention Program
January 2021

Green Infrastructure Feasibility Analysis Guidebook for Planned Roadway Projects
County of San Mateo
June 2022

SFPUC Asset Protection Standards (Asset Protection Standards |
San Francisco Public Utilities Commission
May 2017

Guidance for Sizing Green Infrastructure Facilities in Street Projects
Bay Area Stormwater Management Agencies Association (BASMAA)
June 2019

  • NOTE: Reduced sizing can only be used for road reconstruction projectsthat follow requirements outlined in MRP 3.0 Provision C.3.b.ii (5)(c), or that are non-regulated projects under C.3.b.
  • San Francisco Regional Water Quality Control Board staff provided conditional acceptance of this BASMAA guidance in a June 21, 2019 letter (PDF)

Design and Engineering Guidance

The CCCWP adopted a set of GI Typical Design Details in Spring 2024.  The CCCWP set is based on details developed by the San Francisco Public Utilities Commission and the County of San Mateo, with some adaptations for Contra Costa Permittees.  CCCWP GI Typical Design Details are included in the CCCWP Stormwater C.3 Guidebook, Appendix F.  PDF and AutoCAD DWG files of the adopted details can be found on the C.3 Guidebook webpage. 

CCCWP Green Infrastructure Typical Design Details
Contra Costa Clean Water Program 
April 2024 

Green Infrastructure (GI) Project Planning and Design

Here are some useful guidance manuals, design examples, and engineering details:

Maintenance of Green Infrastructure Facilities

Public Outreach

CCCWP’s outreach efforts to promote Green Infrastructure have included the following:



In April 2018, BASMAA published a Roadmap of Funding Solutions for Sustainable Streets (PDF)Funded by a USEPA grant and managed by the San Francisco Estuary Partnership, the roadmap includes specific actions designed to improve the availability of funding for Green Infrastructure Projects in the Bay Area and statewide.

Laura Prickett of Horizon Water and Environment prepared a memo (PDF) that includes a summary of the Regional Roundtable process that led to preparation of the Roadmap.

Early Implementation/No Missed Opportunities

Green Infrastructure Plan Preparation–Contra Costa Clean Water Program

Permittee Shared Resources for Green Infrastructure Plan Preparation

Staff and consultants who prepared Permittees’ local Green Infrastructure Plans assisted each other by sharing draft text, references, and other resources.

  • Draft generic text for Plan sections (PDF)*  addressing Provision C.3.j.i.(2)(a), (“a mechanism… to prioritize and map areas for potential and planned projects…”; this text describes the development of project lists through the Contra Costa Watersheds Storm Water Resources Plan), and  addressing Provision C.3.j.i.(2)(d), (“A process for tracking and mapping completed projects, public and private, and making the information publicly available; also addresses C.3.j.iv.). This text was prepared by Geosyntec Consultants for the City of Walnut Creek.

Policies to Support Green Infrastructure Implementation