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<br />May 2003 <br /> <br />098'\ . <br /> <br />Table 1 Endpoints and Attributes <br /> <br />~"7,-eeS <br /> <br />:r:,..c.oI"1V. <br /> <br />Endpoint Attribute Descrtption <br />NATIVE FISH - Abundance Reports the incremental effect of management opttons on the expected <br />Humpback (# fish relative to abundance of humpback chub in the Little Colorado River. Number <br />Chub: lCR reported is a loss or gain relative to 2003 abundance. Thts attribute may <br /> Z003) be viewed as a surrogate for other native fish spectes. <br /> Probability of In some cases, a management option may have a higher expected value <br /> Extinctton for chub abundance, but also a higher risk of a negative outcome. Thts <br /> (%) attribute reports the probability of exttnctton of humpback chub in the <br /> Little Colorado River by 2030. This attribute may be viewed as a <br /> surrogate for other native fish species. <br />NATIVE FISH - Probability of Reports the probabiltty of establishing a vtable population of humpback <br />HBC: Establishing (%). chub in the mainstem Colorado River. <br />Mainstem <br />SPORT FISH - Abundance Reports expected abundance of fish> 150 mm in reach above lees <br />R8T (thousands) Ferry. <br /> Size (% of 2003) Reports expected size relative to Z003 above lees Ferry <br /> Probability of Reports the probability that the abundance of rainbow trout above lees <br /> Major Oecline (%) Ferry will decline by 50% or more. <br />SAND Beaches and Arch Reports the expected area of sand bars in Marble Canyon. Increased <br />DEPOSITION Sites sand deposition will improve the availability and quality of camping <br /> (% of 1984 area) beaches and increase protection of archaeological sites from erosion. <br /> Sustatnability of Reports the probabiltty that the estimated sand depositton can be <br /> Sand Sources (%) maintained indeftnitely. <br />RIPARIAN / Peregrine Falcon Reports the expected incremental effect on peregrine falcon abundance <br />WilDLIFE Abundance as a result of management opt tons. Can be used as a surrogate for other <br /> (% of 2003) avifauna that depend on the cold clear aquatic ecosystem above Lees <br /> Ferry. <br />BOA TI NG Magnitude of Reports the magnitude of the daily or weekly water level fluctuation. <br />ACCESS / fluctuation Indicates the relative degree of safety and/or convenience for boaters. <br />SAfETY <br />POWER / Annual Cost Reports the average annual cost of a management option. For dam <br />fiNANCIAL (million S / year) operation options, this involves an estimate of annual power costs <br /> relative to unconstrained operation; for non.power options, it involves <br /> estimating the levelized annual cost associated with construction and <br /> operation of non-power works. <br /> SPA Issue? Reports whether or not a management options creates issues with <br /> (Yes/No) respect to the Colorado River Storage Project Act. It was argued that <br /> issues associated with other Acts (e.g. Grand Canyon Wilderness <br /> Protection Act) should also be included, or that this attributed be <br /> dropped. <br /> <br />{!/t/!woj <br />1W' <br /> <br />GCDAMP MATA Pilot: <br />May 2003 Workshop Report <br /> <br />2 <br />