Project Description

The City of Upland’s Public Works Department is responsible for the maintenance and improvements of the city’s entire infrastructure, including the city water system, stormwater program, and the city’s entire infrastructure.

The San Antonio Water Company (SAWC) has been diverting surface water discharge from San Antonio Creek for recharge in the Cucamonga Creek spreading grounds located along Cucamonga Creek on the western edge of the Cucamonga groundwater basin.

The Colonies at San Antonio (Project) site is located in an undeveloped area in northeastern Upland near the Upland/Rancho Cucamonga city boundary. The Project is described in the Draft Program Environmental Impact Report (DPEIR), The Colonies at San Antonio (prepared by RBF, June 2002). Cucamonga Valley Water District (CVWD), City of Upland Public Works Department, and SAWC expressed concerns that the Project, as described in the DPEIR and supporting technical documents, would result in a reduction of recharge of San Antonio Creek and stormwater in the Cucamonga groundwater basin. A reduction in this recharge will result in a reduction in groundwater yield for CVWD, Upland and SAWC which would make these agencies more dependent on State Project Water.

CVWD, SAWC and Upland jointly retained WEI to review the Project related documents and correspondence and to answer specific questions. WEI reviewed all previous documentation related to this project and gave a thorough explanation of all of the relevant information to the questions and performed several tasks to estimate how the Project could be modified to ensure historical recharge. WEI recommended that the mitigation measures should be incorporated in the final PEIR should the Project be adopted as currently described in PEIR and supporting documents.

WEI, working with attorneys and engineers for all sides, developed a solution to the controversy that when implemented, would preserve the recharge in the Cucamonga Basin.

  • City of Upland
  • San Antonio Water Company