Tri-Valley Ground Water Management District


TVGMD State Water Emails

Tri-Valley Ground Water Management District



From the office of Assmeblymember Frank Bigelow

Assembly District 5


Thank you! Your voice was heard in Sacramento!

Yesterday, my colleagues delivered thousands of petitions YOU filled out to the California Water Commission.

Your message was heard loud and clear: we voted, now do the right thing and fund clean and reliable water storage.

Thank you for your willingness to help and answering the call to action. Together we will get the water storage we were promised and protect California’s future.



From the office of Assmeblymember Frank Bigelow

Assembly District 5


I need your help. Have your voice heard!


In 2014, Californians voted to improve our state’s failing water infrastructure and build additional water storage — including Sites Reservoir and Temperance Flat.

Now, the California Water Commission is snubbing these critical projects and jeopardizing their funding. The Commission’s decision has put California’s future and water security at risk.

I need your help. Have your voice heard!

Tell the Water Commission that we need additional water storage to prepare for the next drought, and we need it now.
Sign the petition today!


Capitol Office
State Capitol, Ste. #4158
Sacramento, CA 94249
(916) 319-2005
fax (916) 319-2105

Jackson Office
33 Broadway, Ste. #C
Jackson, CA 95642
(209) 223-0505
fax (209) 762-8262

Madera Office
730 North I Street, Ste. #102 Madera, CA 93637 (559) 673-0501
fax (559) 673-0503

Placerville Office
2441 Headington Road
Placerville, CA 95667
(530) 295-5505
fax (530) 295-1905



Basin Boundary Modifications Requests – 2018 Schedule

The Sustainable Groundwater Management Act (SGMA) established a process for local agencies to request DWR to review and revise boundaries of existing groundwater basins or subbasins, including establishing new subbasins. The initial round of basin boundary modifications was conducted in 2016 with results published in California’s Groundwater – Bulletin 118, Interim Update 2016. More information on basin boundary modifications, including the Basin Boundary Assessment Tool and the Basin Boundary Modification Request System can be found online at GSAs and local agencies are encouraged to reach out to DWR for assistance with this process. All information to support a boundary modification should be submitted to the Basin Boundary Modification Request System.


    • January 1, 2018: Submission Period opens for 6 months. During this window, GSAs and local agencies can submit the required information to support a Basin Boundary Modification on the SGMA Portal
    • June 30, 2018: Submission Period Closes and 30-day Public Comment Period Opens
    • July 30, 2018: Public Comment Period Closes
    • Fall 2018: Draft Basin Boundary Modifications Released
    • Fall/Winter 2018Final Basin Boundary Modifications Released

Contact: Dane Mathis| | (559) 230-3354

Draft Guidance Documents for Engagement and Communication

DWR’s draft guidance documentsGuidance Document for Groundwater Sustainability Plan (GSP) Stakeholder Communication and Engagement (C&E) and Engagement with Tribal Governments are being finalized. The C&E document offers guidance on communication with stakeholders for GSP development through a transparent and inclusive process. The Engagement with Tribal Governments document is intended to help local agencies engage with Tribal Governments in the planning, financing and management of a GSA, or with the development and implementation of a GSP. Public comments received during the public comment period are taken into consideration as DWR prepares the final versions of these guidance documents. The public comment period closed August 28th, 2017.

Contact: Hong Lin| | (916) 651-9273

Data, Tools, and Reports

From datasets to groundwater – surface water models, the Department of Water Resources (DWR) is providing technical assistance to help Groundwater Sustainability Agencies (GSAs) develop Groundwater Sustainability Plans (GSPs), and implement the requirements of the Sustainable Groundwater Management Act (SGMA). The SGMA Technical Assistance Factsheet enables users to find links to technical resources, available on DWR’s SGMA Program – Data, Tools, and Reports webpage including:

· Statewide Data Platforms

· Interactive Maps

New - The California DWR Land Use Viewer, allows GSAs and the public to easily access both statewide (as recent as 2014 crop data) and existing county land use datasets that have been collected over the last 30 years. The Viewer also includes a variety of tools that will allow users to download and analyze land use data. You may want to access the webinar on YouTube for a demonstration of how to use the Viewer.

New - The Well Completion Report Map Application provides access to statewide Well Completion Reports. Well Completion Reports contain information collected by drillers during the drilling and construction of water wells, including the location, dates of construction, planned use, depth of the well, subsurface geologic units encountered, well construction, and well yield.

·                     Modeling: DWR provides a number of existing integrated hydrologic modeling codes and applications available for use. A summary of these resources is available in the Modeling Tools Fact Sheet, along with FAQs on DWR's Integrated Hydrologic Models and Water Budget Pilot Projects and Integrated Hydrologic Modeling and Water Budgets pertaining to the Sustainable Groundwater Management Act and Groundwater Sustainability Plan Regulations

·                     Climate Change: DWR is providing data, tools, and guidance to assist GSAs with incorporating climate change into their GSPs. This effort leverages previous work done by DWR for the Water Storage Investment Program (WSIP). Please refer to the Climate Change Fact Sheet for more information about what will be provided.

·                     Reports – Best Management Practices, Guidance Documents, Bulletin 118, and Bulletin 160

·                     NEW GSP Initial Notification System (in development) - DWR is currently in the process of developing a new GSP initial notification system for GSAs to use when submitting their intent to develop a GSP in accordance with the GSP regulations (California Code of Regulations, Title 23, Section 353.6). Existing notification that have been provided to DWR and posted on our website ( will be transferred to this new system. DWR will be contacting and assisting GSAs with this transfer process. As soon as the system is operational, GSAs will be required to use the system when submitting future notifications. DWR will provide a user’s demonstration of the system during public meetings tentatively scheduled for December (exact dates and locations will be announced soon). It is anticipated this system will operational in January 2018.

Visit our Data, Tools, and Reports webpage for additional information on DWR’s SGMA related Data, Tools, and Reports.

Land Use Viewer, Wyatt Arnold |
Land Use Program, Simon Eching |
Technical Assistance, Steven Springhorn | (916) 651-9273 |




Contact Your State Representatives


Assemblymember Frank Bigelow


Senator Tom Berryhill





Weather Service Forecasts:






Hammil Valley


Lightning Map


Tri-Valley Ground Water Management District


CA Fire Information


CalFire Fire Incidents

USFS Fire Incidents


Tri-Valley Ground Water Management District


CA Highway Information


California Road Conditions


Highway 395 & Hwy 6 Web Cameras: Coso Junction, 395/203, Benton and Conway Summit

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Water Resources


Mono County Website


California Department of Water Resources


CDFA - California Drought Information & Resources


Cal OES - California drought


USGS-California Drought Information





Page Updated 02-23-17