OCR Text |
Show The Colorado River station near Cisco, Utah, lies approximately 160 miles above the upper reaches of Lake Powell. Located between this station and the lake are the town of Moab, Utah, and some uranium mining and milling operations. The Green River station is located in Green River, Utah, approximately 117 miles upstream from its confluence with the Colorado River. Much of the watershed between the Green River Station and the confluence of the Colorado and Green Rivers is within Canyonlands National Park, and human disturbances are negligible. The San Juan River station, located southwest of Bluff, Utah, is approximately 38 miles from the upper reaches of the San Juan Arm of Lake Powell and may be affected by uranium mill tailings and small oil fields around Mexican Hat, Utah. In addition to these long- term stations of the Geological Survey, the Bureau of Reclamation has recently begun to monitor continuous water temperature and specific conductance at three depths in Cataract Canyon. When an adequate data base has been developed, these data will be correlated with data from the upstream USGS stations. Currently, no routine water quality monitoring occurs on the minor tributaries of Lake Powell. 19 |