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• • iii iiiiiiiiiiiu iii <br /> <br /> STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Nam rat Resources <br />1313 Sherman SL. Room 115 J <br />E~ <br /> <br />Denver, Colorado b0203 I <br />~~ <br /> <br />Phone: (1031 B6fi-3567 I I <br />FAY: 13031 R}~-g106 <br /> DEPARTMENT OF <br /> NATUR~II. <br />Date: September 7, 1995 RESOURCES <br />To: Harry Ranney enYaomer <br />Governor <br />From: Kent Gorham lames S Lochhead <br />Executive Director <br />Michael B. Long <br />CC: Dan Hernandez Division Dueuor <br />RE: Reduction in Hydrologic Monitoring, TR-06, Hamilton Mine, ~C- <br />91-078 <br />I have completed review of the materials submitted by Honeywood <br />Coal Co. on their proposed plan to reduce hydrologic monitoring <br />(TR-06) at the Hamilton Mine. Materials reviewed, in addition to <br />the information provided for TR-06 by the operator included the <br />1992, 1993 and 1994 Annual Hydrology Reports, section 2.04, 2.05, <br />and Exhibit 3 of the approved permit, and the hydrology <br />correspondence file for this mine. Apparently, there have been no <br />formal reviews of the AHR's for this mine by a staff hydrologist, <br />including the 1994 AHR. Therefore, I have included a monitoring <br />frequency review of the 1994 AHR in accordance with the currently <br />approved plan. <br />1994 Annual Hvdroloov Report Review <br />1. The 3rd quarter monitoring episode for the following sites <br />were apparently missed: N-lA, N-2, AW-3, AW-4, AW-5, AW-6, <br />AW-7, BW-1, BW-2, BW-3, SP-1, SP-2, SP-3, SP-4, SP-5, SP-6. <br />Why were these sites not visited during the 3rd quarter of <br />1994? <br />2. The TDS average historical value is skewed by an obviously <br />erroneous value of 2020 mg/1 for site R-1. Please have the <br />operator correct this information. <br />3. No data of any kind was recorded for springs SP-3, SP-4, and <br />SP-5 for the 1st, 2nd and 4th quarters. Please submit the <br />missing data for these three springs. <br />TR-06 Review <br />1. The operator is proposing to conduct quarterly monitoring with <br />an annual full-suite sample in Bramiers Draw, Lower Broad <br />Creek and Section 33 Creek. I propose that the Division <br />approve this portion of the revision. ( see ;(<5 below) <br />