Laserfiche WebLink
11111111111111111 <br />• • <br />STATE OF COLORADO <br />MINED LAND RECLAMATION DIVISION <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />303 866-3567 <br />Fa x: 303 632-8106 <br />pF CO(O <br />h4'~- 9,y <br />Ne; .f.; o <br />0 <br />~ ~ . <br />~.: ~y,'. <br />X976 ~ <br />Roy F,omer. <br />January 15, 1992 Governor <br />Fretl R Banta. <br />Dwisicn Director <br />Kenneth E. Carlson <br />Pittsburg & Midway Coal Mining Company <br />6400 South Fiddler's Green Circle <br />Englewood, Colorado 80111 <br />RE: Edna Mine (C-80-001) <br />1990 Annual Hydrology Report <br />Dear Mr. Carlson, <br />The Division has reviewed the 1990 Annual Hydrology Monitoring <br />Report submitted by Pittsburg and Midway. The following findings <br />were made during the review: <br />1. The variations in the orthophosphate data plots are most <br />likely due to a decimal placement error during transfer <br />of raw data from lab pages to a plotting database. <br />Figure 7 of the report shows values of .13 mgl and .12 <br />mgl for the first and second quarters of 1990. The raw <br />data provided in Appendix 2 reports values of .013 and <br />.012. <br />2. The sampling and analysis meet the requirements of Rule <br />4.05.13 and of the approved monitoring plan. <br />3. The data fall within the historical ranges at the mine. <br />4. The data from the 1990 sampling and measurements are <br />within the projections of the Probable Hydrologic <br />Consequences. <br />If you have questions or are in need of additional information <br />regarding these comments, please contact me. At this time I would <br />also like to remind you that Annual Reclamation Reports are due to <br />be filed at the Division by February 15, 1992. <br />Sincerely, <br />Susan L Morrison <br />Reclamation Specialist <br />