Upper Colorado Region Comprehensive Framework study : Main report.

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PART V REGIOML NEEDS AND DEMANDS Fly fishing for rainbow trout in high mountain stream near Crested Butte, Colorado. Meeting these demands will require 72,000 acres of developed land for fishing impoundments and waterfowl habitat and will require wildlife con- servation considerations on over kl million acres of key habitat area. By 2020, 137>OOO acres of additional land will be required to provide winter range needs for big-game animals. Water Quality, Pollution Control, and Health Factors Projections indicate an increase in concentrations of dissolved sol- ids of about 6l percent near the mouth of the Green River, 18^ percent at the San Juan River near the mouth, and ^-0 percent in the Colorado River at Lees Ferry due to projected development in the region and water expoxts, In some areas costly treatment will be required to upgrade mine drainage water for downstream fish, recreation, and municipal and industrial use . Restoration of mining areas would lessen harmful discharge. Inadequately treated municipal and industrial effluents are polluting some streams.