Madera and Chowchilla Subbasins Groundwater Sustainability Plans

Client: Madera County

Funder: California Department of Water Resources

Location: Madera and Chowchilla Subbasins, Madera and Merced Counties, CA

Date: 2017 - 2020

In 2017-2018, the GSAs comprising the Madera and Chowchilla Subbasins began developing comprehensive, coordinated GSPs to comply with the requirements of SGMA. The team led by Davids Engineering was contracted to develop data needs assessments for each subbasin in 2017, and to proceed with coordinated GSP development for each subbasin beginning in 2018.

The GSPs were developed through a phased, iterative process that was guided through active engagement with GSAs and stakeholders across the adjacent subbasins. Activities were strategically sequenced to meet an aggressive schedule, leveraging longstanding water management planning activities in each subbasin when possible. Interrelated components of each GSP were developed in parallel when appropriate and efficient. Key efforts included development of interrelated water budgets and groundwater modeling across both subbasins; integrated analyses of the feasibility, benefits, and costs of existing and potential projects and management actions to meet sustainability goals; and coordination with other GSPs in the Madera Subbasin.

The Davids Engineering team successfully completed and submitted the Chowchilla and Madera Subbasin GSPs in January 2020, and have since completed the first Annual Reports for each GSP in compliance with the SGMA requirements for critically overdrafted subbasins. These plans will provide for economic, societal, and environmental sustainability in the Madera and Chowchilla Subbasins.

All Projects

Tehama County Groundwater Sustainability Plan Implementation 

Colusa Subbasin Groundwater Sustainability Plan Revisions

Madera Subbasin Groundwater Sustainability Plan Revisions 

Chowchilla Subbasin Groundwater Sustainability Plan Revisions

Moore Siphon Replacement Project

Dos Rios Ranch SB88 Compliance and Crop Planning Analysis

Hart Ranch On-Farm Irrigation Efficiency Improvements

Orland Project Distribution System Modernization

Water Management Plan Compliance Mapping

Agricultural Development Feasibility Assessment

Analysis of Effects of Water Management on Evapotranspiration from Managed Wetlands

Garden Highway Mutual Water Company Water Control Projects

Richvale Irrigation District Phase I Infrastructure Modernization

Joint Water Districts Board SCADA

Sutter Mutual Water Company Modernization Support

Shasta Valley Groundwater Monitoring

Time Series Evapotranspiration and Applied Water Estimates from Remote Sensing

Customer Delivery Measurement Data Collection and Accounting (RemoteTracker Implementation)

SGMA Technical Support Services and Prop 1 Stressed Basin Grant Project

Efficiency Conservation Definite Plan and Conservation Program

Boundary Outflow Measurements

Oakdale Irrigation District Agricultural Water Management Plan

Yuba Water Agency Agricultural Water Managment Plan

Feather River Agricultural Water Management Plan (FRRAWMP)

Colusa Subbasin Groundwater Sustainability Plan Development

Madera and Chowchilla Subbasins Groundwater Sustainability Plans

2022 Verification Project for Madera County GSAs

Little Shasta River Efficiency Study

Mill Creek Flow Measurement Improvements

Kettle Spring Improvement Project

Antelope Creek Fish Passage Improvement Project

Conservation Planning and Operations Decision Support