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mine be monitored if the sandstone shows impacts due to mining. The Division reminded TCC of <br />this commitment in a letter dated 11/25/94, after review of the 1993 AHR. Please submit data <br />collected to date for the wells in the vicinity. <br />Response: No additional data is available for Trout Creek Sandstone wells located within the affected <br />area. Page 2.05-111 of the permit requires additional monitoring in the event inflows from the Trout Creek <br />Sandstone aquifer to the mine workings are encountered. No such inflows have been encountered to date <br />and consequently no additional monitoring has been conducted. TCC believes the declining potentiometric <br />surface measurements exhibited at wells 001-83-106 and 001-83-107 are the result of pumping well 001- <br />83-106 and are not directly associated with mining impacts. <br />4. Data appears to indicate a 20-foot decline in Fish Creek sandstone well 91-M004 since the fall of <br />1993. Does this decline corzespond to undermining during 1994? <br />Response: Mining in the 1 SW L,ongwall panel approximately 1100 feet north of well 91M004 <br />occurred during August 1994. We1191M001 shows no corresponding decline during the same period even <br />though it lies much closer to the panel. TCC does not believe the decline exhibited in well 91M004 <br />corresponds with undermining during 1994. <br />Alluvial Wells <br />1. No response required <br />2. No response required. <br />3. No response required. <br />4. No response required. <br />5. No response required. <br />6. No response required. <br />Surface Water <br />1. No response required. <br />2. No response required. <br />3. No response required. <br />4. No response required. <br />5. An odd shift occurred in the flow data recorded at site 69 on Trout Creek. What change in gauging <br />or stream conditions explains this obvious shift? <br />Response: After evaluating stage/discharge information generated during 1995, TCC believes that <br />staff gage data point adjustments are appropriate for data collected during the 1994 water year. On <br />average, additions of 0,64' to the staffgage readings recorded during 1995 stream gauging measurements <br />i:ldocumenfahr~f'oidel. ckUccalv.l V <br />