HDR Engineering Inc 7/9/2019 - Laserfiche WebLink

I-Y Task 6 Water Supply Demand Requirements 6.1 Objective Prepare CWP chapter describing current and future supply characteristics, including demand forecasts. 6.2 HDR Services 1. Obtain demographic projections from the City's planning department for three time periods: 10- year, 20-year, and build-out. Build-out is defined as when all land is developed to the extent possible under current(2019)zoning or land use regulations. 2. Summarize ten years of historical supply characteristics using available City data such as numberof connections customer category, production, sales, and usage by large industrial customers, non-revenue water, and peaking factor. 3. Present this information on an annual or monthly basis as it is available from the City. Water use factors, including ERUs, will be calculated based on data from the most recent three years. 4. Contact planning staff at Snohomish County and up to 10 wholesale customers to obtain confirmation of demographic data and projections. 5. Review water system plans of Everett's wholesale customers and contact up to 10 of them to discuss whether plans reflect current expectations for future water requirements. Incorporate findings in the forecast of water requirements. 6. Contact the City's economic development specialists to determine whether special provision should be made for large, new industrial uses of water within the 20-year planning period. 7. Demand forecasts, using the demographic projections and water use factors for the City's direct retail customers and wholesale customer forecasts for the wholesale service area, will be calculated for the 10-year, 20-year, and build-out time periods. Forecasts will be presented by pressure zones for the retail service area and by wholesale customer for the wholesale service area. The forecasts will include adjustments to reflect the conservation program from Task 6. 8. Prepare a Technical Memo for City review and comment summarizing the demand forecasts to allow for any adjustments before this information is used in writing the CWP chapter. 6.3 City Responsibilities 1. Provide source data per the data request associated with Task 2. 6.4 Assumptions 1. The City's 2035 plan, updated in April 2019, will provide a suitable basis for assessing future growth. HDR will extend the City's projected growth by five years to allow forecasting of water requirements for the 20-year period 2021-2040. The City Department of Planning and Economic Development will respond promptly to requests for information or clarification. Everett Comprehensive Water Plan June 12, 2019 Exhibit A—Scope of Services Page 8 of 30