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.-~ ~ J. E. STOVER & ASSOCIATES <br />2768 COMPASS DRIVE, SUITE 101 <br />GRAND JUNCTION, COLORADO 81506 <br />PHONE: (303) 245-4101, FA% 242-7908 <br />MINE ENGINEERING <br />MINE RECLAMATION <br />October 16, 1995 <br />III IIIIIIIIIIIIIIII <br />sss <br />CIVIL ENGINEERING <br />CONSTRUCTION MANAGEMENT <br />°Cr ~ ~ ~ss~ <br />4~~F~~~n <br />A. J. Waldron Divisip~p~ era's <br />Division of Minerals and Geology ~Ue~,~J~ <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re: Bowie Resources Limited - Bowie No. 1 Mine <br />1994 AHR, ASR & MIR Review <br />ermP' i`t~-81-038 <br />Dear Mr. Waldron: <br />The Division's letter dated September 12, 1995, transmitted its <br />review of the 1994 Annual Hydrologic, Annual Subsidence and Mine <br />Inflow Reports. Follows are Bowie's responses to the Division's <br />questions and concerns: <br />Annual Hydrologic Report <br />General Comments <br />No response required. <br />Monitoring Frequency <br />No response required. <br />Water Ouantitv and Quality <br />The Division noted two observai:ions regarding groundwater <br />quality. First, the Division indicates well B07 had a <br />sudden and dramatic increase in conductivity in 1993. <br />The Division apparently did not interpret the graph <br />presented on Figure 4 correctly. The sudden and dramatic <br />increase was in water level not conductivity. The <br />conductivity of well B07 has been fairly consistent since <br />1988 with a range of about 900 to 1700. I believe 1993 <br />was the year we had the wet winter and spring which <br />probably explains the sudden increase in water level in <br />well B07. Second, the Division noted a sudden drop in <br />conductivity values since 1990 in the East Roatcap Creek <br />and Stevens Gulch colluvial wells. Bowie is not aware of <br />any phenomena that may account for this change in EC. <br />