Laserfiche WebLink
' EAST MIDDLE FORK <br />' East Middle Fork is a tributary of the Middle Fork of Parachute <br />Creek. The WQCC has proposed use classifications and water quality <br />standards fot Recreation Class 2, Cold Water Aquatic Class 1, Water <br />' Supply, and Agriculture. <br />Currently the East Middle Fork drainage has received little <br />development associated with the Exxon's Colony Shale project. Current- <br />) ly the primary use of the stream is the support of aquatic life. <br />7 Access to the lower segment of the stream is controlled by Exxon. <br />Access to the upper reaches is difficult. <br />l Water quality problems that could potentially limit use of the <br />f stream are limited and are the result of natural conditions. Aquatic <br />life in the stream has been studied in 1973 and 1982. Fish species <br />are limited to cutthroat/rainbow hybrids. The populations of fish <br />decrease as one moves downstream due to the deterioration in habitat. <br />Exxon recommends that the following use classifications and water <br />quailty standards be established for East Middle Fork: <br />Cold Water Aquatic Life Class 1 <br />DO 6.0 mg/1, 7.0 mg/1 spawning <br />pH = 6.5 - 9.0 <br />NH3 = 0.02 mg/l, unionized <br />1 Cyanide (free) = 0.005 mg/1 <br />S as H S 0.002 mg/1, undissociated <br />Nitrite = 0.05 mg/1 <br />Arsenic 0.05 mg/1 <br />Cadmium = 0.005 mg/1 <br />Chromium (Tri) = 0.1 mg/1 <br />Chromium (Hex) = 0.025 mg/1 <br />Copper = 0.01 mg/1 <br />Lead 0.05 mg/1 <br />Iron (Tot.) 1.0 mg/1 <br />1 Manganese (Tot.) = 1.0 mg/1 <br />Mercury = 0.00005 mg/1 <br />Nickel = 0.2 mg/1 <br />1 Selenium = 0.05 mg/1 <br />Silver = 0.00015 mg/1 <br />Zinc = 0.1 mg/1 <br />-~ - Recreation Class 2 <br />Fecal Coliform = 2000/100 ml <br />v <br />