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CHAPTEBTHREE EnulronmeMal Consequences through several water pumps or withstand high temperatures or mechanisms of the process facility. If there are future spawning of razorback sucker and Colorado pikeminnow in this reach, entrainment of drifting or less motile larval forms would probably be unavoidable. Entrainment would result in death and would reduce the larval population in the river. Dispersal of larval fish is passive, random and more or less evenly distributed across a channel cross-section, so that entrainment losses would tend to be proportional to diversion volumes. It is anticipated that the alluvial wells in the Parachute Creek Valley would provide virtually all of American Soda's water requirements in 19 of every 20 years, based on precipitation patterns, river flow, and the exercise of senior water rights. During the driest yeaz, water would be removed directly from the river through the intake structure about 42 percent of the year, in April and July to October. Razorback sucker would be subject to entrainment mortality during the last 2 weeks of April (up to 0.05 percent mortality) and the first 2 weeks of July (up to 0.01 percent mortality) in about 1 of every 20 years. Colorado pikeminnow would be subject to entrainment (up to 0.08 percent mortality) throughout their entire larval drift stage in spring and summer, based on the assumption that larval entrainment is proportional to flow. Other Listed or Candidate Species. Potential effects to other listed or candidate species under the Agency Preferred Alternative would be the same as under the Proposed Action. Other Special Status Species Black Tern, Long-billed Curlew, Western Snowy Plover, and White-faced Ibis. With the netting of all active process ponds, these buds would not be impacted under the Agency Preferred Alternative. Other Special Status Species. 1'he Draft EIS addressed potential effects to fish, reptiles, amphibians, and other special status species. Potential effects to these other species under the Agency Preferred Alternative would be the same as those described for the Proposed Action. 3.10.2 Unavoidable Adverse Impacts Some unavoidable adverse impacts aze expected to remain under the Proposed Action and the Agency Preferred Alternative. If successful population establishment and future spawning were to occur, larval razorback sucker and Colorado pikeminnow would likely be entrained by the Colorado River water intake during the dry periods when it is in operation. Although approximately 560 acres of pinyon juniper woodland would be removed under the Agency Preferred Alternative and the Proposed Action, the Agency Preferred Alternative includes provisions that would lessen impacts to northern goshawk. Higher density stands of pinyon juniper would be protected under the Agency Preferred Alternative and would provide suitable nesting habitat immediately after a mine panel is retired. • Minor losses of Great Basin spadefoot toad, northern leopazd frog, and western yellow- bellied racer may occur at the Piceance and Parachute Sites and along the pipeline corridor, and the amount of available habitat would be slightly reduced. Threatened and Endangered Species 3-19