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J~ " <br />III IIIIIIIIIIIII III ~s <br />STATE OF CU~URADO <br />Roy Romer, Govei <br />DEPARTMENT OFNATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />October 5, 1988 <br />Mr. Chris Reed, President <br />Twin Pines Investment Limited Partnership <br />Falcon Energy Inc, General Partner <br />P.O. Box 2059 <br />Canon City, Colorado 81212 <br />RE: Twin Pines #2 Mine (Permit C-83-058) Semi-Annual Hydrologic Reports <br />Dated December 3, 1987 and June 2, 1988 <br />Dear Mr. Reed: <br />This letter is to acknowledge the Division's receipt of the above mentioned <br />Hydrologic Reports in satisfaction of Stipulation No. 1 and 2 of the Twin <br />Pines #2 mine permit, as amended. <br />The mine does not appear to be having any significant impact on the quantity <br />or quality of water resources in the area. Same clairification of statements <br />made in the June 2, 1988 report is, however, requested. In that report, it <br />was said that "The reservoir level in the abandoned mines increased to the <br />level of the probe hole into the Cedar Canon Mine which had previously quit <br />running." In the report dated December 3, 1987 and on the mine maps, however, <br />the Cedar Canon Mine was indicated to be dry. Is the statement in the <br />June 2, 1988 report a mistake? Do you in fact refer to a resumption of flow <br />from a probe hole into the old Twin Pines Mine? <br />The late May decrease in conductivity of the water being discharged from the <br />mine does appear to be significant and to imply less residence time in the old <br />mine. Is there any history available on that part of the old mine workings so <br />far as water level, quality, source of water that might provide some better <br />idea of what can be expected in the future? <br />The levels and quality of ground water occurring in the TPW-1 well appear to <br />be fairly constant over time. While quality has varied very little in the <br />Caldirola #2 well, water levels appear to be generally lower in the last two <br />years. This lowering, however, appeared before the significant increase in <br />water pumpage from the Twin Pines # 2 mine so there would not appear to be any <br />direct relationship between the two. Well TPW-1 is closer to the mine than is <br />the Caldirola #2 well, and its level is relatively stable, again suggesting <br />little <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 806-3567 <br />