Castle Pines North WC Plan2007 - Laserfiche WebLink

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CDM Executive Summary Introduction The Castle Pines North Metropolitan District (District) currently relies on groundwater from the Denver Groundwater Basin (Denver Basin). Groundwater levels are declining throughout the South Metro area and will lead to a decrease in production and an increase in pumping costs. These effects will require the District to add new wells if the District remains on groundwater. These new wells in addition to the existing wells will have greatly reduced production, leading to higher costs for reduced yield. The District is currently evaluating renewable surface water supplies that would provide a more sustainable supply. Conservation will also be an important component of the District's future water supply management strategy. The purpose of this Conservation Plan (Plan) is to provide guidance in implementing a conservation program that is compatible with Castle Pines North's water supply system, water resources management strategy, and also with the values of the community. The Plan has been developed in accordance with the recommendations outlined in the Colorado Water Conservation Board's (CWCB) Water Conservation Plan Development Guidance Document. Profile of Existing Systelll and Delllands The District has implemented a variety of conservation measures and programs beginning in 2003. These include a modified 4-tiered water rate structure that charges customers (residential and nonresidential) more when an allotted usage is exceeded, water restrictions limiting irrigation to every third day, a rebate program, and educational programs that provide information to customers on conservation and other water related topics. A reduction in per capita demands following the implementation of these measures/programs indicates that these efforts have likely contributed to water savings. However, it is difficult to decipher how much of these savings are attributed to conservation given that a variety of factors such as rainfall and the regional drought awareness campaign following the severe 2002 drought also played a role in demand reductions. Historical well production data from 1998 to 2005 indicates that demands have generally increased as the community continues to develop. Reduction in demands occurred in 2004, which is likely attributed to the factors mentioned above, followed by an increase in 2005. The largest water user within the community is the residential sector followed by District irrigation of parks and open space and Homeowner Association Irrigation. Demands tend to seasonally fluctuate with peak demands occurring during the summer months when outdoor irrigation is the highest. Forecasted demands indicate that the District's water use at build out in 2011 will be approximately 2,240 acre-feet per year (AFY). Potable demands (water that is treated and conveyed through the distribution system) is estimated to be 2,000 AFY. The non- potable demand (treated wastewater that is reused on the Ridge Golf Course) is estimated to be 240 AFY. ES-1 O:\Castle_Pines_North\Conservation Plan\Drafts Submitted For Review\Final Conservation Plan.doc