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Basin Boundary Adjustments

Department of Water Resources Boundary Modifications
The Sustainable Groundwater Management Act (SGMA) established a process for local agencies to request that the Department of Water Resources (DWR) revise the boundaries of existing groundwater basins or subbasins, including the establishment of a new subbasin. The Basin Boundary Emergency Regulation was developed through an extensive stakeholder outreach process and was adopted on October 21, 2015. The provisions of the emergency regulation go into effect on November 16, 2015. Click to continue reading...

Groundwater Sustainability Agency (GSA) of Tehama County - Initial Notification of Potential Basin Boundary Modification Request
The proposed basin boundary modification is a jurisdictional modification involving a consolidation of the portions of the Colusa (5-21.52) subbasin located within Tehama County into the portion of the Corning (5-21.51) subbasin located within the Tehama County. This 1,300 acre area with 10 individual landowners would get better representation by their local elected officials on the Flood Control and Water Conservation District Board of Directors, then to be grouped into the 918,380 acre Colusa subbasin that spans four counties. The Tehama County Flood Control and Water Conservation District became the exclusive Groundwater Sustainability Agency for the portions of the Corning and Colusa subbasins located within Tehama County on February 11, 2016. Click to view full request...

Groundwater Sustainability Agency (GSA) of Tehama County - Submitted Basin Boundary Modification Request
The finalized Basin Boundary Modification Request (described above) was submitted to DWR on March 29, 2016. DWR confirmed that the application is complete on April 11, 2016, this started a 30 day public review period during which DWR will be taking public comment on the completed modification requests through the Basin Boundary Modification Request System (BBMRS). In early June, DWR will host public meetings to present the draft final basin boundary modifications and to hear any additional public comment. For more information and resources regarding Basin Boundary Modification Requests please visit the website here.

Following the technical review of the requested basin boundary modifications and included public input, DWR will publish a Draft Approved Basin Boundary Modification list on their website. The public comment will be summarized and presented to the California Water Commission, which will hear the modifications and provide the public an opportunity to comment. Following consideration and potential incorporation of comments heard, DWR will publish the final basin boundary modifications on their website. Per SGMA, these new basin definitions will be evaluated under the basin prioritization process and documented in the interim update of Bulletin 118. DWR is planning a second opportunity to request basin boundary modifications in 2018.

Basin Boundary Modification Frequently Asked Questions (FAQ)
Is it mandatory to participate in Basin Boundary Modifications requests? How can I be notified when Basin Boundary Modifications related actions happen? Does DWR provide maps that may assist with Basin Boundary Modifications? What are the types of basin modifications? Click to view the answers to these questions and many more...

 

Existing Bulletin 118 Subbasin Boundaries
Existing Bulletin 118 Subbasin Boundaries
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Proposed Bulletin 118 Subbasin Boundaries
Proposed Bulletin 118 Subbasin Boundaries
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Updated: Thursday September 21, 2017

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