Policy for Maintaining Instream Flows in Northern California Coastal Streams

The Division of Water Rights is in the process of preparing a State Water Board Policy for Maintaining Instream Flows in Northern California Coastal Streams. The proposed policy may affect water diversions in coastal streams in portions of Marin, Napa, Sonoma, Mendocino, and Humboldt Counties. Water Code Sections 1259.2 and 1259.4 require the State Water Board adopt the Policy by January 1, 2008. These Water Code sections were enacted by Assembly Bill 2121, which was signed by the Governor in September 2004. The Policy will be prepared in accordance with state policy for water quality control, which requires the preparation of environmental documents.
CEQA Scoping Meeting
Notice of Public Scoping Meeting (not available yet)
Notice of Preparation (not available yet)

To receive updates by e-mail regarding the Proposed Instream Flows Policy for Northern California Coastal Streams, subscribe on-line to the AB2121 Instream Flows Policy mailing list

More – with links:

Trout Unlimited’s and Peregrine Chapter of the National Audubon Society’s Petition for Timely and Effective Regulation of New Water Diversions in Central Coast Streams. (Project Dedicated Webpage)


December 28, 2005 – Status of Pending Applications to Appropriate Water in the Counties of Marin, Napa, Sonoma, Mendocino, and Humboldt
September 22, 2005, State Water Resources Control Board Resolution 2005-0070 – Authorizing the Executive Director to Negotiate and Execute Contracts Responding to California Water Code Section 1259.4 (AB 2121) Regarding the Development of the Principles and Guidelines for State Policy for Water Quality Control for Northern Coastal Streams

USGS Evaluation of Methods Used for Estimating Selected Streamflow Statistics, and Flood Frequency and Magnitude, for Small Basins in North Coastal California

Guidelines for Maintaining Instream Flows to Protect Fisheries Resources Downstream of Water Diversions in Mid-California Coastal Stream


Napa River Watershed – [Under Construction]

Navarro River Watershed – [Under Construction]

Russian River Watershed

Alan Levine