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and recovery of the species. The second step, in this process is to determine the potential economic impacts of the proposed critical habitat designations. The final step is to decide which proposed critical habitat areas, if any, should be excluded from designation based on economic or other relevant impacts, and to determine costs and benefits associated with the final designation. This final step will not be completed until public comments on this document have been received. Proper development of the links between the biology and the economics of the Colorado Basin area is critical to the evaluation of the economic impacts of critical habitat designation. Only if these links are clearly delineated can a dollar value on the impacts of designating critical habitat be determined. Bridging the gap between the biological dimensions of this study and the economic dimensions is a complex process. To properly estimate the impacts of critical habitat designation it was necessary to estimate the combined economic effects of listing and designating critical habitat. This set of results is presented in detail in Chapters II-11, II-12, and II-13 of Volume II. The economic effects of critical habitat designation are the incremental effects above and beyond those which may be attributed to listing the species. Thus, economic effects of the critical habitat designation are those that remain after the listing effects have been subtracted from the total effects. Chapter II-14 presents the methodology for determining the incremental critical habitat impacts. Chapter II-15 presents the incremental monetary impacts of critical habitat designation. The economic team's efforts were directed along three principal lines. First, the economics team worked with the biological team to identify the management practices that may need to be altered in order to ensure the recovery of these fishes. Second, the economics team identified the sectors of the economy that would be impacted based upon the potential alteration of these management practices. These include the agricultural, hydroelectric, mining/gas/oil, recreation, municipal, and industrial sectors. Direct economic impacts to these sectors are discussed in Chapters II-9 and II-10. Finally, the economic team developed a series of models to perform the analysis of the economic impacts due to the proposed critical habitat designation. I-2