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<br />mor~ common in the Dotsero-New Castle area than downstream. Large eddies, <br /> <br />backwaters, and pools are common along the banks where tbe river bed curves <br /> <br />l\J <br />CC <br />-..] <br />.... <br /> <br />bend. Hot springs in the river bend are common from Dotsero to ~ew Castle. <br /> <br />In winter months, steam co~ng off the water marks exact locations of these <br /> <br />springs. <br /> <br />Changes in the substrate, brought about by sedimentation, alter the river <br /> <br />bottom in some areas. Sediment, in this report, is defined as a dense muck, <br /> <br />brown on the water substrate interface and turning grey or black a few millimeters <br /> <br />deep into the substrate. From Dotsero to the state line, the depth of the sediment <br /> <br />increases from a few centimeters along the eddies and river banks to approximately <br /> <br />one mete~ a20ng the pool areas below De Beque. <br /> <br />In addi tion, rocks in the main <br /> <br />c.i.a."lnel are gradually covered with a thin brown "Aufwchs" composed of sand <br /> <br />grains, diato~, and blue-green algae as summer progresses into winter. <br /> <br />~'ASTE SOURCES <br /> <br />Industry, at present, bas little impact on the Colorado River within the <br /> <br />study area. Four industrial sites are located on tr~ main stem. In GlenwooQ <br /> <br />Canyon, the Sr~shone Power plant diverts water for hydro-electric use, periodically <br /> <br />reducing the river flow for a distance of approximately ~~ee miles below the <br /> <br />diversion to a trickle. All diverted water is returned to tr~ River. Union <br /> <br />Carbide operates a nondischarging uranium and vanadi~ mill immediately west of <br /> <br />Rifle. At Cameo, another power plant diverts water from the River, the water <br /> <br />being returned to an irrigation canal. American Gilsonite Company .~s a plant <br /> <br />west of Fruita discharging 100,000 gallons per day of effluent into the River. <br /> <br />-7- <br />