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<br />100
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<br />2530 recovery efforts, and new technologies as they become available, Resources targeted for data
<br />2531 recovery should include those in which dam related impacts are suggested although that
<br />2532 relationship may not be understood, Other criteria to target resources include the immediacy
<br />2533 of the impacts, the probability of data recovery, data utility for other program
<br />2534 research/monitoring efforts and traditional and scientific resource.
<br />2535
<br />2536 B. Recreational Resources
<br />2537 1, Backwound
<br />2538 Recreational use of the river corridor has economic and environmental importance.
<br />2539 As a major public use within Glen and Grand canyons, recreation creates jobs and financial
<br />2540 support within the region and also has affects on other resources. The preferred alternative in
<br />2541 the EIS has considered impacts on recreation and has attempted to enhance the recreational
<br />2542 experience (e.g., opportunities to experience wilderness, natural quiet and solitude, etc.) in
<br />2543 the river corridor and increase safety. Also of importance are the possible impacts of
<br />2544 recreation on other resources. The objectives of the long-term monitoring and research
<br />2545 program are to determine whether recreational experiences and safety are affected from
<br />2546 dam operations, and whether changes in recreational patterns resulting from selected dam
<br />2547 operational conditions have any effect on the downstream resources.
<br />2548 Status of Knowledge
<br />2549 Past studies have focused on issues related to recreational impacts from crowding,
<br />2550 and safety and risk of injury relative to flow releases from the dam. Recreation and crowding
<br />2551 studies have addressed flow releases, launch schedules, and travel time to estimate numbers
<br />2552 of encounters as a proxy for crowding. These studies concluded flow levels affect travel time
<br />2553 and that launch schedules have a large effect on encounters (Jalbert 1992, Underhill and
<br />2554 Borkan 1986). River flows also affected available camping beaches which affected the
<br />2555 frequency of encounters ( L. Kearsley and Warren 1993). Safety studies suggest that flow
<br />2556 discharges can be related to white water accidents, and depending on flow stage, some rapids
<br />2557 are judged to be more or less dangerous with corresponding levels of risk ( Brown & Hahn-
<br />2558 Oneill, 1987).
<br />
<br />November S, 1998
<br />Second Draft - Do Not Cite, Pbotocopy, or Distribute
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