Page 12 - Yucaipa Valley Water District - Board Workshop

Workshop Memorandum No. 18-241 Page 3 of 13

Long-Term Infiltration Study for the proposed Calimesa Lake and Spreading Basins

The District staff has been working with Geoscience for the development and operating plan for
the proposed Calimesa Lake and Spreading Basins. Based on a thorough evaluation and study
of the groundwater basin, the District will be able to effectively operate and manage the westerly
portion of the Beaumont Basin consistent with the adjudication overseen by the Beaumont Basin
Watermaster (http://www.beaumontbasinwatermaster.org/)

The attached scope of services will utilize the installation of monitoring wells to determine the
water mounding effect and lateral movement of subsurface water when the spreading basins are
constructed.

This information is necessary to be able to properly size and operate the proposed spreading
basins.

Yucaipa Valley Water District - October 30, 2018 - Page 12 of 56