WSP08927

• File Number: 8141.600.20
• Description: Fryingpan-Arkansas Project - Studies - Environmental Studies
• State: CO
• Basin: Arkansas
• Water Division: 5
• Date: 10/12/1983
• Author: US DoI BoR
• Title: Draft Supplement to the Final Environmental Statement Fryingpan-Arkansas Project Colorado
• Water Supply Pro - Doc Type: EIS

0007

Alternatives Considered in Detail
No Action Alternative
This alternative reflects the present .level of water sales from the

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reservoir and the present reservoir. operational practices. Reservoir releases

are made to meet senior water rights demands downstream of Ruedi Reservoir or

to compensate downstream water users for out-of-priority diversion by the

collection system of the Fryingpan-Arkansas Project. Fall, winter al).d early

spring releases are made from the reservoir to: provide adequate storage for

spring runoff.

The first-round water sales of 7,850 acre-feet included 1,850 aore-feet

of augmented water sales for munioipal and.domestio uses and 6,000 aore-feet

of augmented water sales for industrial use, and represents the maximum amount

of water whioh would be sold from Ruedi Reservoir during an extremely dry

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year.

Preferred Alternative. Maximum Augmentation Sales, with No Sales from
a 28,000 AF Replacement Pool, Assuming a 20%/80% Munioipal/Industrial
Demand Split, Respectively

The preferred Alternative represents a modifioation of the maximum

unoonstrained yield of the reservoir oapaoity (~lternative 2), This modifioa-
f_ -, ,

tion was a result of"publi6 oomment and oonsul~ation during the assessment

review process. Water sales would be restrioted to the available water supplY

provided by Ruedi Reservoir with 28,000 aore-feet'being available annually for

replaoement purposes. This oonforms with the ihtent of the projeot authoriza-

tion to provide up to 28,000 aore-feet of capaoity in Ruedi Reservoir .equ'iva-

lent to that whioh would have been provided by the proposed Aspen Reservoir

for replaoement and other purposes. Water sales would not be made from the

replaoement pool until additional operating experienoe is gained. This alter-

native will yield a marketable water supply of up to 58,000 aore-feet under a

dry-year condition' depending on the demand pattern reflecting shortages of up

to 15 percent and 30 peroent, respectively, for ,industrial and municipal and

domestic uses.

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ENVIRONMENTAL CONSEQUENCES

The various environmental effeots of the different alternatives are due

to differenoes in the amount of water sold from:Ruedi, and the differences in

the timing of the release of water from the reservoir. In an average year, No

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