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West Elk Coal Company, Inc. III IIII IIIIIIIII III Post O11ice Box 591 Somerset. Colorado 81434 999 Telephone 303 929 5015 " January 31, 1990 Matthew S. Hayes Reclamation Specialist Colorado Mined Land Reclamation Division 1313 Sherman Street, Room 215 Denver, CO 80203 F~a ~ i~9A MIW~R I,ahU I?ECLAMATION I?IVISI~,V Re: Responses to Mid-term Well Completion & Monitoring Duestions, Permit c-ao-oo~ Dear Matt: In response to Cathy Begej's questions regarding the completion of some of West EIk Coal Company Inc.'s (WECC) monitoring wells, attached are revised tables from the Well Completion and Location Reports Exhibit #2.8.2.A.1 and revised text page Nos. 2-562-12, 4-69, 4-70c & 4-72b. The exhibit tables contain as much information as I was able to locate on a few older wells, and some wells we no longer monitor, about which Cathy had questions. The first table shows which wells are currently monitored. These revised pages should replace those in Exhibit 2.8.2.A.1 submitted previously. Table 2.8.A.6 on page 2-562-12 was corrected by deleting well SOM-23-H-1, as tt is no longer included in the current monitoring program (as approved by TR #55). Pages 4-69, 4-70c and 4-72b were revised to clarity the statement regarding minimum and maximum indicator parameter values contained in WECC's computer files of monitoring data and utilized to indicate potential affects of mining. These minimum and maximum values were not statistically generated, but are the actual minimum value and maximum value for each resource recorded during the pre-mining baseline monitoring program. In addition to these text changes, WECC will provide in the 1989 Annual Hydrology Report, the minimum and maximum values used for each resource, the years, and the number of baseline data points recorded to obtain the values. 4A1C0-E20~