CastleRock_WCPlan_Applic

• Water Efficiency Grant Type: Water Conservation Planning Grant
• Contract/PO #: OE PDA 06-40
• Applicant: Town of Castle Rock
• Project Name: Town of Castle Rock Water Conservation Plan
• Title: Grant application for Water Conservation Planning
• Date: 8/31/2005
• County: Douglas

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"well data and controls are input into the model. including: water levels and aquifer properties;
maintaining a half-mile buffer between wells; only drilling wells within the Town's future service
boundary; and replacing wells over time as they become less efficient. The Town's groundwater
model is derived from the South Metro Water Supply Study model, but is updated to include the
Town's revised growth and use data. The model provides a framework for assessing the impacts on
the groundwater resource over the next 50 years.

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The South Metro Model indicated that our region's water supply shows a diminished supply
over time - as continued pumping occurs, more wells are required to meet projected, future
demands due to the transition of the aquifers from a confined state to an unconfined state. The
Town's refined model shows similar findings.

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The groundwater model will be used in determining the preferred water supply options. The
model will provide a basis on which to evaluate the optimal mix of conservation, reuse,
groundwater and renewable water and its impacts the Town's aquifers.

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The initial results of the model indicate the Town has time to address its long-term water
supply issues. However, the cost to continue down the current path of relying on non-
renewable groundwater is high and the time to develop a strategic plan to diversify the Town's
water portfolio is now. Many of the renewable water projects required to reduce the Town's
dependence on non-renewable groundwater will take decades to come to fruition.

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Renewable Water
Work continues on evaluating the potential of bringing renewable water to the Town. There
are three primary areas where renewable water can be obtained in any great quantity. The
scope of the renewable projects is so expansive that Castle Rock alone cannot develop the
financial or political capabilities to implement them. The Town's involvement in the South
Metro Water Authority and the proposed Conservation District Legislation is crucial to the
Town's success in the renewable water arena, The Town is currently participating in the
following regional programs:

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The design and study of the East Cherry Creek Valley (ECCV) Pipeline to provide lower
South Platte River to ECCV, and allow the Town use of the pipe for transporting the same
water;
Regional efforts to work with Denver Water on a conjunctive use plan;
The Chatfield Reallocation Study that is determining the potential for increasing the storage
pool in Chatfield Reservoir; and
· Talks with Parker Water and Sanitation District for use of their Reuter-Hess Reservoir.

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CWCS Water Conservation Planning Grant Program

SA VING WA TER THROUGH EDUCA nON, INCENTIVES, AND APPL/CA TJON OF BEST MANAGEMENT PRACTICES