Santa Clarita Valley Basin Boundary Modification

Under the Sustainable Groundwater Management Act (SGMA), public water purveyors can apply for basin boundary changes that modify the areas they are managing. The application process requires significant technical information to support the need for modifications, but can give water purveyors more direct control to sustainably manage groundwater resources.

GSI helped CLWA staff in preparing the technical information necessary to submit a modification request, which ultimately led to DWR's approval of the request in fall of 2016. The boundary changes will give SCV Water greater ability to develop a workable SGMA-compliant groundwater sustainability plan for its basins.

GSI’s work involved:

• Developing maps and technical data on the geology and groundwater conditions in the Upper Santa Clara River Valley East Sub-Basin and the Pleasant Valley Basin
• Reviewing well logs and water level data to characterize groundwater conditions
• Assisting with preparing applications and technical deliverables for boundary modifications to the California Department of Water Resources (DWR)
• Helping to identify stakeholders that may be affected by the boundary changes