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Q029 2.1 . : ~-, .: ". _>. ~ ' i II. DESCRIPTION OF THE ALTERNATIVES This chapter presents the alternatives evaluated in the impact assessment process. Eleven alternatives were originally considered in detail in the EA, including four sets of objectives. The first objective (No Action Alterna- tive) described the present sales and operational conditions for Ruedi Reservoir. The second set of objectives (Alternatives 2-5 plus Preferred Alternative) included maximum sale of water from RUedi Reservoir to meet muni- cipal, domestic, and industrial demands. The third set of objectives (Alternatives 6-8) included minimization of risk to in stream and recreational values. The fourth set of objectives (Alternatives 9 and 10) included hydroelectric power generation. Section 2.2 describes alternatives eliminated from detailed study. Section 2.3 discusses po~sible mitigation measures which are applicable to the alternatives. Section 2.4 compares alternatives in detail using tabular and graphic presentations. Appendix H presents the Record of Decision ,which identifies the Preferred Alternative. 2.1 Alternatives Considered in Detail 2 .1.1 Alternatives Considered in Detail in this, Supplement preferred Alternative. Maximum Supplemental Supply, With No Sales from a 28,000 AF Replacement Pool, Assuming a 20%/80% Municipal/Industrial Demarid Sp1i~, Respectively The preferred'a1ternative represents a modification of the maximum unconstrained yield of the reservoir capacity (Alternative 2). This modifica- tion was a result of public comment and consultation during the assessment review process. Water sales would be restricted to the available water supply provided by Ruedi Reservoir with 28,000 acre-f,eetbeing available annually for replacement purposes. This conforms with the 'intent of the project authoriza- tion to provide up to 28,000 acre-feet of capacity in Ruedi Reservoir equiva- lent to that which .would have been provided by the proposed Aspen 'Reservoir for replacement and other purposes. Water sales would not be made from the replacement pool until additional operating experience is gained. This alter- native will yield a marketable water supply of up to 58,000 acre~feet under a dry-year condition depending on the demand pattern reflecting shortages of up to 15 percent and 30 percent, respectively, for industrial and municipal and domestic uses.