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Significant envirorunental and social parameters Air quality Fisheries Benthos Riparian woodlands Table $-1 .--Comparative environmental and social impacts of alternatives (continued) No action Maintenance of high "quality air standards. No expected change. No expected change. No expected change. Modified selected plan 1982 Dust an~ exhaust emissions from construction equipment will be temporary in nature during the construction phase. With the inundation of 13,189 acres, it is expected that the warm-water fishery resource in the conservation pool will improve drama- tically over existing riverine conditions. Additionally, a cold-water fishery will be established downstream of the dam. Anticipated that a significant change in species composition and numbers will take place with the stabilization of the river bottom by impoundment. Inundation of 2,666 acres of woodlands comprised of 1,621 acres of open cotton- wood stands, 62 acres of closed cottonwood stands, 749 acres of willow-cotton- wood stands, 64 acres of pure willow stands, and 170 acres of open park. , Selected plan 1976 Dust and exhaust emissions from construction equipment will be temporary in nature during the construction phase. With the inundation of 13,189 acre-feet of water, it is expected that the warm- water fishery resource in the conservation pool will improve dramatically over existing riverine conditions. Anticipated that a significant change in species composition and numbers will take place with a stabilization of the river bottom by impoundment. Inundation of 2,666 acres of woodlands comprised of 1,621 acres of open cotton- wood stands, 62 acres of closed cottonwood stands, 749 acres of willow-cottonwood stands, 64 acres of pure willow stands, and 170 acres of open park. Further ground- water development Maintenance of high quality air standards. Further ground-water development to the extent needed for irrigation purposes would in all likeli- hood 1 ead to the further degrada- tion of the existing fishery resource. Minor changes due to a lowering of river levels and the con- comittant"loss of attachment sites for bottom-dwe 11 i ng organ; sms. If river flows are reduced through ground-water pump- ing, the gradual encroachment of woody vegetation (willow and cotton- wood) is likely to take place. Weld County reservoir development Dust and exhaust emissions from construction equipment" will be temporary in nature during the construction phase. With the inundation of 13,800 acres of water, it is expected that the warm- " water fishery resource in the pool will improve dramatically over existing riverine conditions. Anticipated that a signifi- cant change in species com- position and numbers will take place with a stabilization of the river bottom by impoundment. Inundation of 4,200 acres to the top of the active stor- age zone are primarily comprised of both living and " dead open cottonwood stands.