Wyandotte Creek GSA directs staff to prepare amendments after periodic GSP evaluation

The Wyandotte Creek Groundwater Sustainability Agency on March 20 directed staff to prepare formal amendments to its groundwater sustainability plan after a consultant presented a periodic evaluation and Department of Water Resources (DWR) corrective actions.

The evaluation, presented by Ryan Fulton of Larry Walker Associates, explained that a periodic GSP evaluation is required under the State Water Code and is due every five years; the first is due in January 2027. Fulton said the evaluation "provides an assessment of the subbasin's current conditions, including an evaluation of project and management actions" and recommended a package of amendments to respond to DWR comments and fill data gaps.

Board members heard that DWR's written corrective actions request removal of a "two non‑dry year" condition that the GSP used in its undesirable‑result definitions and asked the GSA to better quantify risks to domestic wells, interconnected surface waters and groundwater‑dependent ecosystems (GDEs). Fulton told the board that the planned amendments will include updates to sustainable management criteria (SMCs), enhancements to the monitoring network and…