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' <br /> xvii <br />' streams contained no fish. <br /> From qualitative sampling of invertebrate populations, it was observed <br /> di <br /> ng <br />that the National Resource Land streams produced a poor to moderate stan <br /> crop of benthic invertebrates. Common organisms identified were caddisflies, <br /> mayflies, stoneflies, midges, damselflies, and dragonflies. <br /> Historical water flow measurements ranged from yearly averages of 7 <br /> thousand cubic feet per second (CFS) to S CFS. The Green River had the <br /> D <br />il <br />i <br /> ev <br />, <br />rty <br />largest discharge followed by the Virgin, Price, San Rafael, D <br />' Paria and Escalante in descending order of magnitude. Water quality was <br /> similar throughout the study area. Each river exhibited a pH of about <br /> 8.0, a temperature range from 0 to around 30 C, and suitable dissolved <br /> oxygen levels for fish life. A characteristic of rivers of southeastern <br />' ess <br />d <br />h <br />di <br />b <br /> n <br />, <br />ar <br />i <br />ty, <br />Utah was the heavy sediment load which caused high tur <br /> and conductivity. Results from field water quality monitoring fell within <br /> the ranges of that determined as normal from historical data. Possible <br /> impacts of proposed mining on water quality and the aquatic biota were <br /> discussed. <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br />11