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Section 5 Formulation of Alternative Plans

EAA Storage Reservoirs Revised Draft PIR and EIS February 2006

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groups (“1” means no acceptance, “6” means greatest acceptance among

stakeholders). Effectiveness is based on achievement of planning objectives and

generation of habitat units (“1” represented the alternative with the least

number of planning objectives while a “6 “represented the alternative the

achieved the greatest number of planning objectives). Completeness is uniform

for each of the project alternatives, and therefore is not included in the

evaluation matrix.

5.4.6 Plan Comparison using Cost-Effectiveness and Incremental Cost Analyses

(CE/ICA)

Cost-effectiveness analysis begins with a comparison of the costs and outputs of

alternative plans to identify the least cost plan for every level of output

considered. Alternative plans are compared to identify those that would produce

greater levels of output at the same cost, or at a lesser cost. Alternative plans

identified through this comparison are the cost-effective alternative plans. Next,

through an incremental cost analysis, the cost-effective alternative plans are

compared to identify the most economically efficient alternative plans, that is,

the “Best Buy” alternative plans that produce the “biggest bang for the buck.”

Cost-effective plans are compared by examining the additional (incremental)

costs for the additional (incremental) amounts of output produced by

successively larger cost effective plans. The plans with the lowest incremental

costs per unit of output for successively larger levels of output are the “Best Buy”

plans. The results of these calculations and comparisons of costs and outputs

between alternative plans provide a basis for addressing the decision question

“Is it worth it?”

System formulation outputs used for CE/ICA are displayed in Table 5-21. The

basis for average annual output calculations was previously explained. Note

that the output values reflect the differences between without project and with

project on an average annual basis (i.e., ecological “lift” provided by each of the

alternatives).

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