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Colorado pikeminnow The Colorado pikeminnow (Ptvchocheilus Lucius is atorpedo-shaped fish with an olive-green and gold back, silver sides and white belly. The Colorado pikeminnow thrives in swift flowing muddy rivers with quiet, warm backwaters and are primarily piscivorous, but smaller individuals also eat insects and other invertebrates. These fish spawn between ]ate June and early September and when they are 5 to 6 years old and at least 16 inches long. Spawning occurs over riffle areas with grave] or cobble substrate. The eggs are randomly splayed onto the bottom, and usually hatch in less than one week. The U.S. Fish & Wildlife Service has previously determined that water depletions in the Upper Colorado River System are a major source of impact to the endangered fish species. Continued water withdrawals have restricted the ability of the Colorado River system to produce the flow conditions required by the various life stages of these fish. OSM could not find any record of any previous consultations for water depletions from the Upper Colorado River Basin and the Colorado pikeminnow. OSM required Snowcap Coal Company to verify its current water depletion estimate for the Roadside North and South Portals mine. Snowcap Coal Company responded that there is a 17.8 ac/ft consumptive water loss from evaporation from sediment controls for the disturbed area and another 4.3 ac/ft consumptive water loss from water used for dust control. Therefore, based on the above information, OSM has determined that PR-03 "may affect /likely to adversely affect" the Colorado pikeminnow. Humpback Chub The humpback chub (Gila cypha) is a streamlined minnow with a concave skull and a prominent nttchal hump at the occiput, the back end of head marked by a line separating scaleless and scaled portions of epidermis with a caudal peduncle thin but not long snout that overhangs upper lip and scales often minute or absent on keel, Adults are dark on tap and light below and fins rarely have yellow-orange pigment near base. Adults are usually range from 12-16 inches long and weigh ;/a to 2 pounds. The humpback chub historically ranged in [he mainstem Colorado River preferring slower eddies and pools downstream to below the Hoover Dam site, however, present populations are restricted to areas in, and upstream, of the Grand Canyon. The U.S. Fish Rc Wildlife Service has previously determined that water depletions in the Upper Colorado River System are a major source of impact to the endangered fish species. Continued water withdrawals have restricted the ability of the Colorado River system to produce the flow conditions required by the various life stages of these fish. OSNI could not find any record of any previous consultations for water depletions from the Upper Colorado River Basin and the humpback chub. OSM required Snowcap Coal Company to verify its current water depletion estimate for the Roadside North and South Portals mine. Snowcap Coal Company responded that there is a 17.8 aclft consumptive water loss from evaporation from sediment controls for the disturbed area and another 4.3 ac/ft consumptive