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Table of Contents <br />List of Tables and Figures ........ <br />iii <br />............................... <br />Executive <br />Summary ............ ............................... <br />iv <br />Section 1: <br />Introduction <br />I <br />......... ............................... -1 <br />Section 2: <br />Critical Habitat, Species Listing <br />and the Designation .................... <br />I-4 <br />A. <br />Critical Habitat ........ ............................... <br />I-4 <br />B. <br />Listing History and Habitat Designations ....................... <br />I -5 <br />1. Listing History .... ............................... <br />I -5 <br />2. Historical and Current Habitat ......................... <br />I -5 <br />Section 3: <br />Physical and Economic Settings ........................... <br />I -10 <br />A. <br />Physical Setting ...... ............................... <br />I -10 <br />B. <br />Physical Factors and Activities in the Determination of the Without Fish <br />Scenario for the Colorado River Basin ..................... <br />I -12 <br />C. <br />Linking the'Biological Dimensions to the Economics ............... <br />I -13 <br />D. <br />Economic Setting ..... ............................... <br />I -14 <br />1. Economic Output <br />. ............................... <br />I -14 <br />2. Employment .... ............................... <br />1 -15 <br />3. Historical Development of the Basin .................... <br />I -15 <br />Section 4: <br />The Economic Modeling Framework ........................ <br />I -16 <br />A. <br />Overview ......................................... <br />I -16 <br />B. <br />The Modeling Approach . ............................... <br />I -17 <br />C. <br />Without Fish and With Fish Scenarios ....................... <br />I -17 <br />1. Without Fish Scenario ............................. <br />I -17 <br />2. With Fish Scenario ............................... <br />I -18 <br />D. <br />Aggregation of Producing Sectors .......................... <br />I -18 <br />Section 5: <br />Approaches to Economic Activity Changes <br />From the Without Scenario ................. <br />I -20 <br />A. Recovery Implementation Programs and Section 7 Activities .......... <br />I -20 <br />B. <br />Flow Related Activities .. ............................... <br />I -21 <br />1. Hydroelectric Impacts ............................. <br />I -24 <br />2. Recreation Impacts ............................... <br />I -24 <br />3. Agricultural Impacts .............................. <br />I -24 <br />4. Municipal and Industrial Impacts ....................... <br />1 -24 <br />C. <br />Nonflow Related Activities .............................. <br />I -25 <br />1. Oil, Gas, and Other Drilling Activities ................... <br />I -25 <br />2. Nonnative Fish Stocking and Fish Program ................ <br />I -25 <br />3. Other Impacts ... ............................... <br />I -25 <br />i <br />