Laserfiche WebLink
<br /> <br />Mr. Rick Mills - 8 - July 7, 1988 <br />Other possible problems identified are as follows: <br />a) The total dissolved solids value for the well 001-5-5, April 7, <br />1984 analysis seems to be in error; and <br />b) The lead value (well 001-5-5; October, 1982) is possibly a data <br />entry error. <br />These values should be checked and corrected as necessary. <br />Spoil Springs <br />Numerous spoil springs are monitored throughout the Mine 1, Mine 2 and Eckman <br />Park mine areas. The data indicate possible increasing electrical <br />conductivity and/or total dissolved solids at spring 114, C-1, C-2, Dcomp, and <br />J. Iron levels may be increasing at springs A-2 and Dcomp. High silver <br />values have been recorded at springs 114, A-2, C-1, Dcomp, E, J and EP-87-1. <br />Relatively high zinc values have been reported for springs 114 and E. <br />Finally, a relatively high nitrate value was recorded during 1987 at spring <br />EP-87-1. <br />Please provide your interpretation of the elevated silver values. <br />Surface Water <br />The surface water monitoring network includes sites operated by both Colorado. <br />Yampa Coal Company and the U: S. Geological Survey. In general, relatively <br />elevated values for electrical conductivity, total dissolved solids, iron, <br />manganese, and/or sulfate are observed at sites along Foidel, Middle, Fish and <br />Trout creeks. Specific observations and requests are listed below. <br />Foidel Creek Stations - <br />1. The content of Figure 36 (stations 8 and 14) is extremely helpful; <br />however, the graph is not easily interpreted because too much information <br />is displayed. Please consider distributing the information over two or <br />three graphs in the next AHR to allow easier interpretation. <br />2. Station 800 exhibits elevated silver levels. Zinc levels have also been <br />relatively high. <br />3. Please check the April 1981 (Station 800) molybdenum value, it may be in <br />error. <br />4. Please include a graph representing electrical conductivity for <br />Station B00, with the next AHR. <br />5. Why are two stations (station 8 and station 2005) used, one for <br />monitoring water quality and one for discharge. All data should be <br />collected at the same site. Please verify that quality and discharge <br />data will be collected at the same location. <br />