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solids of 415 mg/l , with suspended solids ranging from 10- <br /> • 1560 mg/l . The sulfate concentration averaged 100 mg/l , <br /> with copper concentrations ranging from 0-17 mg/l and iron <br /> ranging from 100-1900 ug/l . <br /> Data collected from Bear Creek (BC-1) provide <br /> the best indicator as to the water quality characteristics <br /> which would occur naturally in Dutch Creek. It should , <br /> however , be recognized that Dutch Creek drains an area <br /> which, as described by the Forest Service in the Thompson <br /> Creek Land Use Plan, is characterised by very steep slopes <br /> and high erosion potential . Bear Creek, on the other hand , <br /> drains an area characterized by moderate to steep slopes , <br /> and moderate to high erosion potential . The natural occurrence <br /> • of solids and concentrates in the Dutch Creek samples will <br /> thus be higher than in the Bear Creek samples , although <br /> comparison of the data does provide a useful indicator . <br /> The Bear Creek data show dissolved solids of <br /> 315 mg/l , suspended solids ranging from 0-250 mg/l , sulfates <br /> averaging 120 mg/l and iron ranging from 0-3700 ug/l . <br /> The last sampling point on Coal Creek before <br /> the creek discharges to the Crystal River (Station CC-1) is <br /> located 3 miles below Bear Creek. Upper concentrations <br /> ranged from 0-10 ug/1 and iron ranged from 100-3300 ug/l . <br /> The average TDS was 317 mg/l, suspended solids ranged from <br /> 10 to 350 mg/1 and sulfate concentration averaged 100 mg/l . <br /> -23- <br /> I <br />