Colorado - Old Dillon Reservoir Enlargement_Application & Scope of Work

• Basin Roundtable: Colorado
• Applicant: Summit County
• Description: Old Dillon Reservoir Enlargement
• Account Source: Basin
• Board Meeting Date: 3/19/2008
• Contract/PO #: 09000000026
• WSRA - Doc Type: Grant Application

Water Supply Reserve Account - Grant Application Form
Form Revised May 2007

4. The water activity meets the provisions of Section 37-75-104(2), Colorado Revised Statutes. The
requirements/language from the statute is provided in Part 3 of the Criteria and Guidelines.

This grant application is to help offset permitting and preliminary engineering costs
for a structural project (Old Dillon Reservoir Enlargement) intended to maximize
the use of Salt Lick Gulch watershed runoff and store this water in accordance with
existing and future water storage rights for the benefit of the people of Dillon,
Silverthorne and Summit County. The 2004 UPCO study and SWSI projected
future water shortages and identified the need to develop additional water supplies
in Summit County (see, for example, Table 5-7 of SWSI Report). Reservoir options
in Summit County are somewhat rare due to the challenging topography and lack
of supply. After reviewing other feasible water supply alternatives within Summit
County, the proposed Old Dillon Reservoir Enlargement Project is one of the most
viable water supply development options available for Summit County, the Town of
Dillon and the Town of Silverthorne.

3. For Applications that include a request for funds from the Statewide Account, describe how the water activity
meets the Evaluation Criteria. See Part 3 of Criteria and Guidelines.

Not Applicable.

4. Please provide an overview of the water project or activity to be funded including - type of activity, statement
of what the activity is intended to accomplish, ilie need for the activity, the problems and opportunities to be
addressed, expectations of the participants, why the activity is important, the service area or geographic
location, and any relevant issues etc. Please include any relevant TABOR issues that may affect the
Contracting Entity. Please refer to Part 2 of Criteria and Guidance document for additional detail on
information to include.

Old Dillon Reservoir is currently a 46.14 acre-foot impoundment owned and operated
by the Town of Dillon and located between the Denver Water Board's Dillon Reservoir
and I-70. Dillon Reservoir is located within Summit County and is just west of the
corporate boundaries of the Town of Dillon and the Town of Silverthorne. Please see
Exhibit 'A' for a map indicating the location of Old Dillon Reservoir.

Summit County, the Town of Dillon and the Town of Silverthorne are cooperating on an
enlargement of Old Dillon Reservoir to serve existing and emerging needs in Summit
County, Dillon and Silverthorne. The proposed enlargement will have a final total
projected capacity of between 180 ac-ft and 255 ac-ft depending on final cost
estimates for different alternates that will be produced during the final design phase of
the project in the fall of 2008.

Presently the Town of Dillon has a 1939 storage right for 46.14 ac-ft in Old Dillon
Reservoir decreed in Civil Action 1806 and a right to store up to 20 acre-feet of water
in exchange for releases from Clinton Gulch Reservoir (95CW077). The Town of Dillon

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