Stormwater C.3 Guidebook

Stormwater C.3 Guidebook


A 6th Edition of the Guidebook is anticipated in February 2012. The 6th Edition will incorporate addenda to the 5th Edition and other incremental technical and organizational improvements.

Stormwater C.3 Guidebook. 5th Edition (October 2010, 2.2 MB .pdf)

Stormwater C.3 Update describes changes in effect December 1, 2011.

List of corrections and addenda to date (December 1, 2011, 52KB .pdf)

Memo on Vertical Position of Underdrains in Bioretention Facilities (February 22, 2010, 69KB .pdf)

Memo describing changes from the 4th Edition (October 2010, 123KB .pdf)

Additional Guidebook Resources

IMP Sizing Calculator

Released October 2009. Consistent with the 5th Edition. Be sure to review and follow Guidebook instructions for preparing a complete Stormwater Control Plan. Calculator and setup file (3MB .zip). After installing the calculator, read the help file.

Appendix A: Local Exceptions and Requirements

Follow the link to the local municipality website:

Appendix B: Soils, Plantings, and Irrigation for Bioretention Facilities

As of December 1, 2011, Appendix B in the Guidebook is superseded by the soil specification in Attachment L to the MRP, which was added by San Francisco Bay Regional Water Quality Control Board on November 28, 2011. See the Board Agenda Item Package on the Board website. The following suppliers have submitted a soil sample and test results to the Program per the requirements of Appendix B. Acceptance of materials for a specific project is at the discretion of the local municipal inspector. (Suppliers will be requested to resubmit samples and results in compliance with Attachment L.)

Memoranda

Guidance for HSPF Modeling

For compliance with flow-control requirements using Option 3 (memo 763 KB .pdf)

Basic Geomorphic Assessment Methods and Criteria

For compliance with flow-control requirements using Option 4b. Contact the Program to obtain a copy.

Contra Costa Hydrology Data

Stormwater Control Plan Template

Current version (July 31, 2011) corresponds to the Guidebook 5th Edition and also prompts organized input of information that the Water Board recently added to municipalities' annual reporting requirements. (115KB .doc)

Example Stormwater Control Plans

Please note these example plans were prepared in compliance with previous editions of the Stormwater C.3 Guidebook. They are made available as examples for format and presentation.

Operation and Maintenance of Stormwater Facilities

Forms

The following documents are in MS Word and may be incorporated into Stormwater Facilities Operation and Maintenance Plans. See Chapter 5 of the Stormwater C.3 Guidebook, Fourth Edition

Operation and Maintenance Fact Sheets

The following fact sheets provide general information on maintenance of stormwater facilities. In the Stormwater Facilities Operation and Maintenance Plan, this information should be augmented with information specific to the facility and the site.

Example Operation and Maintenance Plans

The following plan is provided as an example. Requirements tend to be project-specific and should be discussed with staff of the municipality having jurisdiction.

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