Coordinated Water System Plan - Kitsap County Government

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Kitsap County May 9, 2005 Coordinated Water System Plan Regional Supplement 2005 Revision obtained from several water systems during the survey for the CWSP update did not provide this kind of detailed water usage information. Therefore, projections were made based upon the total number of households, with no distinction being made for single-family and multi-family households. Projections for commercial, industrial, and other customer classes are reflected by the employment projections. 7.3 Boundaries To develop the water supply requirement projections, FAZ boundaries, UGA boundaries, and subarea boundaries were identified and used to assess water demand and water use characteristics. Water supply requirements were projected for the FAZ areas. UGA boundaries were used to distinguish between rural and urban water usage characteristics in the County. The Kitsap County zoning map defines the UGA boundaries for Kingston, Poulsbo, Silverdale, Bremerton, Port Orchard, and Bainbridge Island (see Exhibit 7-2). Where FAZ boundaries did not correlate with UGA boundaries, a percentage of the FAZ was designated as being outside the UGA and inside the UGA. This was accomplished using three approaches. Where possible, the TAZ forecasts, which project population in smaller areas than FAZs, were used to determine where the population growth was occurring. A second approach was to divide the growth based on land area that fell within or outside the UGA. The final approach was to have staff from the County planning department review the areas and comment on the percentage of growth attributed to the area within the UGA. To analyze supply requirements on a larger scale, forecasts were summarized by dividing the County into four subareas: North Kitsap, Central Kitsap, South Kitsap, and Bainbridge Island (see Exhibit 7-1). The subarea boundaries are drawn along section lines that approximate FAZ boundaries in order to facilitate analysis with existing database formats. 7.4 Water System Data To estimate the total forecasted water use in Kitsap County, the following methodology was used. Water production data from the last three years as reported by water systems throughout Kitsap County, was used in conjunction with the demographic forecast to project future water supply requirements. A Survey of Water Demand and Sources of Supply, dated December 10, 2001, was sent out to all Group A water systems with 50 or more connections. The level of information and data collection methods varied between water systems. Due to the varying responses to the survey, individual water systems were chosen to represent water supply requirements inside and outside UGAs. Five water systems with complete data were chosen to represent a typical water supply requirement on a per household and per capita basis for areas outside the UGAs. Five water systems within UGAs provided complete data that was used to estimate water supply requirements inside UGAs. Per capita water supply requirements were calculated by dividing total water supply requirements by the total number of people estimated to be served by the water system. Total water supply requirements include the following components: Section 7 - Water Supply Requirements 7-2
Kitsap County May 9, 2005 Coordinated Water System Plan Regional Supplement 2005 Revision • Residential demand – The amount of water sold to residential customers. • Non-residential demand – The amount of water sold to non-residential (e.g., commercial and industrial) customers. For some systems, such as the City of Bremerton, this component can be quite large (Bremerton’s non-residential use is 50% of its average day demand). • Non-revenue water – The difference between the total amount of water produced by a water system’s sources of supply and the total amount of water sold to customers. This includes water used for system flushing and maintenance, fire fighting, as well as water lost to leaks in the distribution system. To estimate the number of people served by the water system, the total number of households reported to be served by the water system was multiplied by the average number of people per household. Based on year 2000 PSRC data, the average number of people per household in Kitsap County is 2.68. In the analysis below, values associated with “per capita” or “per household” water use include water for other than residential purposes. Table 7-1 summarizes per capita water supply requirements based on survey results for the representative water systems outside UGAs, for years 1998, 1999, and 2000. The per capita water supply requirements for the three years were averaged. The average of all of the water systems’ three-year average was 88 gallons per capita per day. Table 7-1 Water Supply Requirements Outside the UGA - Gallons per Capita per Day (1) (Including Non-Revenue Water) Water Systems 1998 1999 2000 3 Year Average Indianola 77 74 75 75 North Peninsula 77 77 72 75 Alpinewood 100 91 93 95 Vinland 102 94 101 99 Keyport 110 91 92 98 Average 93 85 87 88 (1) Includes commercial, industrial, and other uses Table 7-2 summarizes per capita water supply requirements for the representative water systems inside UGAs, for years 1998, 1999, and 2000. The per capita water supply requirements for the three years were averaged. The average of all of the water systems’ three-year averages was 133 gallons per capita per day. Section 7 - Water Supply Requirements 7-3
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Kitsap County Coordinated Water Sys
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Kitsap County May 9, 2005 Coordinat
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List of Tables Kitsap County May 9,
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Section 1 Summary 1.1 Introduction
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Section 2 Kitsap County May 9, 2005
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2.3 1992 CWSP Preparation Kitsap Co
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Section 3. SUPPLY Kitsap County May
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Ordinance No. 134 Page Two Kitsap C
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Page Four Kitsap County May 9, 2005
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10.9 Environmental Document Kitsap
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WAC 197-11-960 Environmental checkl
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System Name Kitsap County May 9, 20
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Appendix L Kitsap County May 9, 200
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Stream Number** Stream Name Gage Nu
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#279 Blackjack Creek and tributarie
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#342 Unnamed Stream and tributaries
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Coordinated Water System Plan - Kitsap County Government

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