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., , <br />~~~ III IIIIIIIIIIIIIIII <br />999 <br />i The Pittsburg & Midway Coal Mining Co. <br />~~ A Chevron Company <br />6400 South Fddler's Green Circle, Englewood, CO 80111-0991 <br />Mail Address: P.O. Box 6518, Englewmd, C080155fi51a ~ FAX 13x71 B3Pa204 • Phone laoa) ~~ <br />Mazch 20, 1995 <br />RECEIyEr <br />~ 2 ~ 1995 <br />Division or M~nerdrs o ~euWyY <br />Edna Mine <br />Annual H drology Report <br />Mr. Kent A. Gorham <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room #215 <br />Denver, CO 80203-2273 <br />Dear Mr. Gorham: <br />Enclosed are responses to your comments, dated March 14, 1995, regarding the 1994 Annual <br />Hydrology Report. To facilitate your review, each of the Division's comments have been <br />reproduced in itnlics followed immediately by the comment response. <br />No flow values were located for the April visit [o sites TR-n and TR-b. Please provide dtis <br />information. <br />Flow values at TR-a and TR-b are not available for the date samples were taken along Trout <br />Creek. The samples for surface water quality along Trout Creek were taken on April 5, <br />1994. The streamflow monitoring stations were not able to be activated until April 19, 1994 <br />due to the frozen conditions of the stilling well at TR-a and the creek area at TR-b. In the <br />future, surface water samples will not be obtained until after the streamFlow monitoring <br />stations aze activated to ensure that water quality measurements are accompanied by <br />stream ow measuremenw. <br />No iron valtees were located for the April samples taken ai Sites TR-A, TR-B, TR-C and <br />TR-D. Please provide this information. <br />Iron was added to the surface water parameter list as part of Technical Revision 20 which <br />was approved in July 1994. As such, iron concentrations were not analyzed for prior to <br />that time. <br />3. No water sample infonnntion wns sr4bmitted for the spring and seep survey conducted on <br />May 10, 1994. Please subn:ii the irt(onnation as required by your npproved permit. (page <br />4.6-145, 146). <br />Spring No. I, also known as NPDES discharge point 006, was the only spring observed <br />during the 1994 spring and seep survey meeting the minimum criteria for sample collection. <br />Due to status of this spring as an NPDES discharge point and being monitored for the <br />