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Threatened Endangered, and Sensitive (TESJ Species' Habitat Assessment Survey April of 2004. Most of the Canada lynx have remained in the core release area, which has a northern border (Gunnison, Colorado) approximately 60 miles south of the Project Area. As a result of the reintroduction program, Canada lynx have established dens throughout Colorado, with one den found in southern Wyoming. Most of the dens were in Engelmann spruce/subalpine fir forests in areas of extensive downfall at elevations ranging from 8,700 to 11,700 feet (CDOW, 2004e). Suitable den habitat does not exist within the Project Area, which is in Douglas-fir forest with minimal downfall at 6,850 to 7,500 feet in elevation. While Canada lynx dispersing from the core release area may pass through the Project Area, it is anticipated that no effects to this species will result from development of this project. The Uncompahgre fritillary butterfly was officially listed as an endangered species by the USFWS on June 24, 1991. It has the smallest total range of any North American butterfly species, with known habitat limited to two verified major sites and two possible small colonies in Gunnison, Hinsdale, and possibly Chaffee counties, Colorado. All known populations of the Uncompahgre fiitillary butterfly are associated with large patches of snow willow (Salzx reticulata spp. nivalis) on northeast-facing slopes above 13,200 feet elevation (USFWS, 1991). Proposed project development will occur far below the elevation of known Uncompahgre fritillary butterfly occurrence. No effects to this species are anticipated as a result of this project. The boreal toad was added to the USFWS's candidate specie:. list upon publication of a status review on January 6, 1989 (USFWS, 1994). The State of Colorado lists the boreal toad as endangered. It is the only alpine species of toad in Colorado. Tlie boreal toad is restricted to areas with suitable breeding habitat (lakes, marshes, ponds, and bogs with sunny exposures and quiet, shallow water) in spruce-fir forests and alpine meadows between 7,000 and 12,000 feet elevation (CDOW, 2004f). No suitable habitat for this species exists within the Project Area. No effects to this species are anticipated as a result of this project. Four species of fish listed as endangered by the USFWS may be affected by water depletions in the North Fork Gunnison River, which feeds the Gunnison River and eventually, the Colorado River. The bonytail chub and razorback sucker historically occurred in the Gunnison River system (CDOW, 2004g; CDOW, 2004h), and the humpback chub and Colorado pikeminnow have a historic range that includes the Colorado River system (CDOW, 20041; CDOW, 2004j). These four species, and their corresponding critical habitat, can be impacted by water depletions upstream of their critical habitat, Development and operation of this project will not affect water level or quality for any critical habitat for these species. No effects to any of these species aze anticipated as a result of this project. 3.3 BLM SENSITIVE SPECIES Table 2 presents the BLM list of sensitive species for Gunni:>on County, Colorado. The BLM maintains a sensitive species list at the Sate Office level under the authority of the Federal Land Policy Management Act of 1976. Designation of species' as sensitive is considered and eazly warning system that focuses management attention on ecosystem components that are raze, fragile, or in decline. 1838-Oxbow_TES Survey_(10.25.04).doc