Location:Colusa Subbasin, Colusa and Glenn Counties
Date:2016 - Present
In 2016, the team led by Davids Engineering was contracted to support Colusa and Glenn Counties in SGMA compliance efforts for the subbasins underlying portions of each county, including the Colusa Subbasin. Through funding from a Proposition 1 SGMA Stressed Basin Grant, our team began laying the technical foundation for Groundwater Sustainability Plans (GSPs) by:
•Completing a detailed review of high-priority data available for establishing the Basin Setting
•Identifying potential data management platforms and groundwater models, and
•Developing initial subbasin water budgets and a preliminary Hydrogeologic Conceptual Model (HCM).
Since 2019, our team has led development of a coordinated GSP that will cover the entire Colusa Subbasin. GSP development has seamlessly built upon prior technical efforts to describe foundational components of the Colusa Subbasin Basin Setting, including the HCM; groundwater conditions; and historical, current, and future conditions water budgets.
Ongoing GSP development efforts have followed key guiding principles:
•The processes for developing and implementing the GSP are iterative and adaptive to achieve sustainability for all beneficial groundwater users while also balancing the needs of local communities and the local economy
•GSP decisions must consider both social and technical information, including both qualitative and quantitative factors affecting all users.
In this spirit, the Davids Engineering team is leading GSP development to ensure regulatory compliance with SGMA and provide a foundation to achieve and maintain sustainability of the Subbasin’s groundwater resources while also maintaining and enhancing local communities, the economy, and the environment. These efforts will culminate in the completion and submittal of a SGMA-compliant GSP by January 2022.