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<br />- 6 - <br /> <br />Station <br /> <br />Location and Description <br /> <br />large floc particles. Depth generally 1-1/2 ft., <br />width 30 to 40 ft. Bottom rocks covered with red- <br />gray film. Corresponds to Station B-7. <br /> <br />US-13 <br /> <br />San Miguel River just above mouth. Width 24-30 ft., <br />depth 1-1/2 ft. Stream swift with general appear- <br />ance and bottom as ~ Station 12, except coloration <br />not as intense as at Station 0S-l2. Corresponds <br />to Station B-8. <br /> <br />B-4 <br /> <br />Dolores River, 4.7 river miles below confluence of <br />Dolores and San Miguel Rivers. <br /> <br />US-14 <br /> <br />Dolores River, 12.2 river miles below confluence, <br />21.4 miles above Gateway, at bridge, Colorado <br />Highway 141. Two channels, rocky bottom. Wider <br />channel had slower velocity, greater depth, <br />gray-brown mud bottom. Narrow ".hannel had 6" to <br />I' depth, swifter velocity, gray-green slime-mud <br />bottom combination, less turbid water. <br /> <br />. <br /> <br />US-IS <br /> <br />Dolores River, at Gateway, Colorado. Riffles just <br />downstream of Highway 141 bridge. Stream wide, <br />2-1/2 ft. deep, very turbid after rain. Bottom <br />rocks covered with light algae growth and slime. <br />Corresponds to Station B-S. <br /> <br />SAMPLE COLLECTION AND PROCESSING <br /> <br />Slick Rock Area <br /> <br />Two quart river samples and one quart effluent samples for chemical and <br />radiological analysis were taken daily, August 17-28. The sampling period was <br />divided into a S-day composite cycle (I), August 17-21, and a 7-day cycle (II), <br />August 22-28. On days where there was no flow at a particular station, no <br />sample was collected. Two quarts of Burro Mine drainage were collec~ed daily for <br />the first cycle of which one was filtered by the Slick Rock plant laboratory <br />through Whatman #2 paper. During cycle I, the Slick Rock plant seepage was <br />sampled by a daily grab; during the second cycle an automatic sampler took a <br />sample once an hour which was composited and collected each day. <br /> <br />Uravan Area <br /> <br />River and effluent sampleswere the same size as in the Slick Rock area. <br />All four effluent samples at Uravan were taken daily from 24-hour composites by <br />company-owned splitter box samplers. Compositing periods were the same as in <br />the Slick Rock area. <br /> <br />Other Samples <br /> <br />One pint sediment samples for radiological analysis were taken at. each <br />