Agmt10 West Yost Associates - Laserfiche WebLink

Browse Search

TASK 4.2 REFINE VvATER DUTIES The City has developed unit water demand factors used for developing planning projections of annual water use. These unit water demand factors are documented in the City's Attachment Q. WY A will review unit water demands used by the City, and confirm that available parcel, customer billing and water use data are sufficient to develop existing water use on a parcel by parcel basis for the hydraulic model, and to refine water duties. WY A will also identify particular land uses that may have high fire flow requirements. WY A will compute new land use-based unit demand factors to determine whether the unit demand factors used by the City require revision and refinement. These land use-based unit demand factors will be correlated with the City's service designations so that resulting water demand projections can be compared to projections in the existing Urban Water Management Plan (UWMP), as discussed further in Task 5. In order to develop the new unit demand factors, WY A will collect land use information in a GIS format to the extent it is available. Information will be developed so that it is consistent with customer classifications identified in the UWMP as specified by DWR and with the definitions set forth in SB 610 and 221. Historical metered water use provided by the City, along with GIS parcel data, will be used to develop unit demand factors. Task 4 VJork Products: . Draft TM summarizing land use data, review of unit water use factors and available data for refining water duties and refinements to water duties, where needed. . GIS-based land use map. Task 4 Assumptions: . The City will be provide at least 5 years (2004 to 2008) of metered water use, by address and zip code (per the City, zip code is only available for the last three years), for those services that are metered. Task 5 Water Demand Analysis Objective: Re-confirm the City's anticipated water demand requirement at the buildout of the City General Plan, and accurately allocate projected demands throughout the City, if necessary. This will allow the City the ability to review existing demands as compared to current projections, and to evaluate the potential impacts and timing of new customer demands on existing and future water system infrastructure. Work Tasks: TASK 5.1. DEVELOP ANNUAL WATER USE PROJECTIONS WY A will project water demands for each service class and compare them to the City's forecasts in its existing UWMP. Demands will also be projected using a population-based methodology to serve as a October 22, 2009 5