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Last modified
11/23/2009 12:40:55 PM
Creation date
8/29/2007 3:46:42 PM
Metadata
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Template:
Floodplain Documents
County
Arapahoe
Title
South Metro Water Supply Study - Technical Appendices
Date
2/1/2004
Prepared For
South Metro Water Supply Study Board
Prepared By
Black & Veatch, Rick Giardina & Associates, HRS Water Consultants, Hydrosphere
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />Appendix 2 - East Cherry Creek Valley Water and <br />Sanitation District (ECCVWSD) <br /> <br />District Boundary! Service Area <br /> <br />ECCVWSD provides water and wastewater services to primarily residential users located in south <br />central Arapahoe County, the District extends east from Parker Road across E-470 to Gun Club <br />Road and from Arapahoe Road north to Quincy Avenue. The District includes 8,800 acres of <br />planned service area of which 7,600 acres are either fully or partially developed. Significant in- <br />fill residential development will occur as well as development of residential and some <br />commercial properties in the 1,200 acres that are not currently developed. The District has <br />developed just over one half of its residential equivalents with build-out expected by 20 10- <br />2015. The service area is shown in Figure E-l. <br /> <br />ECCVWSD, at this time, relies exclusively on non-tributary groundwater for its municipal water <br />supplies. Because of the density of urban development in the District and the aquifer properties in <br />the Denver Basin aquifers underlying ECCVWSD, it has been necessary to develop additional <br />water supplies from areas beyond the district boundaries. These non-tributary groundwater <br />supplies have been acquired on State Land Board leases on the Lowry Bombing Range <br />(Rangeview) to the east of the district and from the Willows Water District where non-tributary <br />groundwater resources became available after Willows Water District acquired water service <br />contracts from Denver Water. ECCVWSD holds 771 acre-feet of surface water supplies on the <br />South Platte River that it intends to deliver through a proposed piped interconnection with the <br />Denver Water system at the Willows Water District. All non-tributary groundwater and surface <br />water supplies that would be developed through the Willows Water District will be conveyed. <br />along a pipeline to be built along the E-470 corridor. Current plans are for this pipeline to deliver <br />water by summer 2003. <br /> <br />Limited tributary groundwater supplies could be developed along Cherry Creek as an exchange <br />for lawn irrigation return flows from the Piney Creek drainage. <br /> <br />A wastewater collection system in the district connects to the Aurora wastewater collection <br />system for delivery to Metro for treatment and discharge to the South Platte River north of <br />Denver. No wastewater treatment occurs or is planned within the District. No return flows from <br />wastewater conveyed to the Metro Wastewater Treatment Plant are available to ECCVWSD for <br />augmentation or nonpotable purposes. The district does intend to consider potential approaches to <br />maintaining dominion of at least part of those return flows in the future as a method for reducing <br />their demand on pumping from nontributary groundwater sources. <br /> <br />ECCVWSD's Board has adopted a policy of acquiring 50% renewable supplies to reduce the <br />demands being placed on the non-tributary groundwater resources. The Board has also adopted a <br />requirement that water supply planning include a 10% reserve above forecasted demands. While <br />the current portfolio of non-tributary groundwater resources is adequate to meet future demands <br />on an annual volumetric basis, the District does recognize that declining well production in the <br />future will require the addition of replacement wells outside the District boundaries. The District <br />must also resolve hydraulic capacity limitations within their water system so peak flow demands <br />can be met. At this time, it is estimated that the District will require an additional 5,500 gallons <br />per minute of peaking capacity under ultimate buildout conditions. It is anticipated that this <br />
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