WSP10444

• File Number: 8441.400
• Description: Colorado Big Thompson Project - Reports
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 8/1/1986
• Author: Colo. Water Resource
• Title: Summary Report - Preliminary Hydrologic Analysis
• Water Supply Pro - Doc Type: Report/Study

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Lakewood, Colorado 80228

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303/987-3443

Colorado Water Resources and
Power Development Authority
Attention: Mr. Dan Law, Associate Director
1580 Logan street, suite 620
Denver, Colorado 80203

August 28, 1986

RE: JOINT-USE RESERVOIR AND GREEN MOUNTAIN EXCHANGE
PROJECTS. SUMMARY REPORT OF HYDROLOGIC ANALYSIS

Dear Mr. Law:

We are pleased to submit this report summarizing the results of
the preliminary hydrologic analysis performed as part of the
Phase 2 investigation of the Joint-Use Reservoir and Green
Mountain Exchange Projects.

Phase 1 of the Joint-use Reservoir and Green Mountain Exchange
Projects involved the initial screening analysis. It was
designed to eliminate at an early stage, those reservoir sites
that would not be suitable for a joint-use or replacement
reservoir. The Initial Screening Report summarizing the results
of Phase 1 was submitted on January 22, 1986.

Phase 2 involves the detailed hydrologic, operational and water
rights analysis of the remaining sites and a recommendation of
sites for Phase 3 analysis. Phase 3, the reconnaissance study
phase will involve detailed geotechnical investigations and
preliminary design and cost estimates.

As a part of Phase 2, we have evaluated six reservoir sites
including Wolford Mountain site A', Wolford Mountain Site C, Red
Mountain, Wolcott, Azure and Una Reservoir sites to determine
their ability to meet the Project requirements. The analyses
show that all six reservoir sites can produce the necessary
yield to meet the Joint-Use Reservoir requirements
(approximately 30,000 af). In addition, Wolcott Reservoir alone