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<br />I'"E305 "30 '0.' <br /> <br />disCh&r98 and associated flows and fluctuations. By the <br />co~pletlon ot the Glen Canyon fIS, these values will be <br />eight years old. In addition, these studies were conducted <br />durinq periods of relatively high and steady tlows. Finally, <br />there has been the observation that the nature of commercial <br />white water trips have changed in terMS ot average trip <br />length. For the purpose of comparisons with impacts to power <br />production discussed above, it would be useful to reestimate <br />these relationships. Associated services toed to rafting <br />trips also need to be determined. <br /> <br />Intoraation Heeds: Contingent valuation surveys will be <br />designed to determine the relation between the economic <br />benetits of recreation, its associated services, and flow <br />characteristics. <br /> <br />C. Non-use Economics <br /> <br />15. Question: Are there any non-use benefits that are <br />attributable to the maintenance of a stable environment in the <br />canyon below Glen canyon Dam and if so would these values be <br />aftected by changes in dam operations? <br /> <br />~-15.1. There are no significant non-use values associated <br />with existence and condition of Grand canyon resources unlea~ <br />individuals intend to directly utilize them for their own <br />recreational activities. <br /> <br />Justitication: Various surveys have shown that individuals <br />have non-zero values for maintenance of the environment. <br />These non-use values could be motivated by a sense of <br />environmental responsibility, the desire to preserve the <br />resource for personal use, or the desire to preserve the <br />resource for future generations. The question is whether <br />these attitudes and associated economic benefits are present <br />with respect to any portion of the Grand Canyon that are <br />affected by da~ operations. <br /> <br />Inforaation Heeds: surveys will be designed to determine the <br />attitude of the public toward supporting preservation and <br />maintenance ot the Grand Canyon environment. The appropriate <br />sample to be surveyed is yet to be determined. Possibilities <br />include a sample of re.ident western states, a sample of <br />U.S. residents, or a sample of households served by <br />utilities that have a firm power contract for CRSP power. <br /> <br />17 <br />