Water Supply & Facilities Master Plans
California Water Service Company

West Yost has developed Water Supply and Facilities Master Plans for eight California Water (Cal Water) Districts. These planning efforts have included groundwater quality and basin supply assessments, surface water supply alternatives, recycled water supplies, and extended period simulation models.

Work components of these projects include: developing new service and water demand growth projections; developing integrated water supply plans that evaluate alternative water supply sources to meet projected demands; conducting inventory and facilities condition and capacity assessments; updating, enhancing, and calibrating hydraulic models; and providing phased, prioritized capital improvement projects. 

Through our ongoing work with Cal Water, West Yost has implemented a number of innovative tools and approaches, including:

  • Using geocoded software tools to cost-effectively automate the allocation of meter/consumption data to individual junctions in the hydraulic model, improving the accuracy of demand allocation and model results.
  • Establishing a metrics of the life-cycle cost for typical water facilities to quickly summarize, through easily understood graphics where Cal Water is on the replacement cycle curve.
  • Employing a methodology that makes running simulations and modifying/updating the hydraulic model by in-house staff straightforward and intuitive.
  • Using portable electronic meters to collect flow data for development of a composite hourly diurnal curve at a very low cost.
  • Implementing a field reconnaissance approach and facility checklist, allowing our team to get in and out of each site quickly and still gather all needed facility data.

West Yost has provided these services for the following Cal Water Districts:

  • Bakersfield
  • Chico-Hamilton
  • Dixon
  • Livermore
  • Marysville
  • Stockton
  • Visalia
  • Willows