WSP09467

• File Number: 8281.990
• Description: Colorado River Studies and Investigations -- Webster Hill Dam and Reservoir
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/2001
• Author: Brown and Caldwell
• Title: Technical Memo NO 4A: Analysis of Alternative 4 - New Storage Facility at Webster Hill Site - Mainstem Colorado River
• Water Supply Pro - Doc Type: Report/Study

'I
II
II
I
I
I
I
I
I
I
I
I
I
I
I
.
I
I
I

o

(.~ )

DRAFT

N
c')
e.n
O'J

INTRODUCTION AND PURPOSE

The Phase 1 investigation (CWCB, September 2000) recommended that six possible reservoir sites
downstream from the Shoshone Power Plant be investigated for feasibility for supplying the
20,000 acre-feet release. These reservoir sites include: .

. Alternative 4f, Roan Creek,
. Alternative 4g, Mt. Logan,
. Alternative 4k, Dry Hollow Creek,
. Alternative 4m, Colorado River Main Stern,
. Alternative 4n, Parachute Creek and
. Alternative 40, Starky Gulch,

These sites were analyzed in Technical Memorandwn 4 (CWCB, March 2001). After review and
discussion of these alternatives; the Executive Committee made the following fmdings and
directions:

. The tributary sites (4[, 4g, 4k, 4n, and 40) were found to be of questionable economic
feasibility and were dismissed from further consideration.
. Further analysis of the economic feasibility of the mainstem site, Alternative 4m, was
directed.

The purpose of Technical Memorandwn 4a is to report on the findings of this additional economic
analysis.

- .\.l~...\.......\.......lo.\ 1 O';';'oC;\f1Urm::.tive4\techmem04\techmem04a\techmem04a.doc
,

3