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. 18 . a bad taste so they manage against it by drawing down water levels and using herbicide. The CDOW is proposing to plant sterile grass carp in Hallenbeck to control aquatic vegetation growth. This reservoir is managed for warm water sportfish. The lake was drained in 1990 and restocked in 1992 with largemouth bass and bluegill (Table 4). Smallmouth bass are also present, having been illicitly stocked. Largemouth bass and bluegill were first stocked in 1983 and a state record bluegill was produced for two consecutive years (1988 and 1989). Both largemouth bass and bluegill populations had low PSD values before the lake was drained in 1990. The lake does not contain a soft-rayed fish species. Angler surveys last conducted from April 1 to July 1, 1990, projected angler use at 6,500 hours with a CPAH of 1.26. Hallenbeck is a popular fishery because it is fairly close to Grand Junction, it is open for much of the year, and offers warmwater species. Tiger muskie would offer a new kind of fishing (trophy esocid) to the area. Fishermen are not allowed to wade, float tube, or boat in Hallenbeck because it is a terminal water supply. Occupied endangered fish habitat exists in the Gunnison River where a remnant population of Colorado squawfish exists. More endangered fish habitat exists at the confluence of the Gunnison and Colorado Rivers where different populations of squawfish and endangered species could be affected (Table 5). The distance from Kannah Creek to the Colorado River is about 15.5 river miles. Native fish species occurring in Gunnison River below Delta are bluehead sucker, tlannelmouth sucker, roundtail chub, speckled dace, and mottled sculpin. All species other than sculpin appear to be common; native fish species information is not available for Kannah Creek. It is possible to prevent muskie escapement from Hallenbeck Reservoir because it can be managed not to spill. Also, releases to the North Fork of Kannah Creek can be screened to remove fish the size of tiger muskie when they are planted - approximately 8 inches in total length. The only escapement route would be into the North Fork of Kannah Creek to Kannah Creek and to the Gunnison River, a distance of about 9 river miles. The channel of the North Fork of Kannah Creek is small - less than 5 feet wide and normally dry. The channel of Kannah Creek is about 15-20 feet wide, usually less than 12 inches deep, and experiences severe drawdowns during the irrigation season. Neither stream appears to provide suitable habitat for . . . . . . . .