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<br />~ <br /> <br />Aquatic Life. Impacts to aquatic life could be expected in the <br />Blue River between Dillon and Green Mountain Reservoirs as a result of <br />substantially reduced streamflow during phase 2. This reduction in <br />streamflow would reduce trout biomass in this reach of the river <br />especially during dry years (4 years out of 28 during the modeling <br />period). Mitigation measures could include project operational changes <br />(release modifications), fish stocking, and instresm habitat improve- <br />ments. A supplemental fish stocking program would cost $10,000 to <br />$20,000 annually. Habitat improvement involving instream structures <br />would cost $10,000 to $50,000 per mile. Potential costs associated <br />with changes in project operations cannot the determined at the present <br />time. <br /> <br />Wetlands and Riparian Areas. Loss of 1,256 acres of wetlands as a <br />reault of inundation by Wolford Mountain Reservoir would adversely <br />affect livestock and hayland production and waterfowl and foraging <br />habitats. The cost to mitigate wetland impacts would vary depending. on <br />the measures selected. Costs could range from less than $100 per acre <br />for minor adjustments up to $10,000 per acre for new wetland creation. <br /> <br />Soils. Inundation of approximately 591 acres of State-important <br /> <br /> <br />farmlands by Wolford MountaIn Reservoir would be considered a signifi- <br /> <br />cant long-term impact. The soils associated with these farmlands would <br /> <br /> <br />be removed from agricultural production for the life. of the project. <br /> <br />There are no practical mitigation measures available to replace these <br /> <br />soils. Slope stability snd soil erosion caused by road and dam con- <br /> <br />struction activities would be significant short-term impacts. Numerous <br /> <br /> <br />mitigation measures such as proper design of cut-and-fill slopes, ade- <br /> <br />quate sediment and erosion control fscilities, and activity scheduling <br /> <br />could be employed. Costs could range from $500 to $8,000 per acre. <br /> <br />32 <br />