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Ground Water- Year 1993 <br />[n 1993. three wells were monitored: <br />1) the Montoya dug well, downstream and north of the permit area, <br />2) the USGS well, approximately 1000 feet northeast of the northeast permit boundary, <br />3) the Monitoring well 29-4, located at tfie southern, upstream end of the permit area. <br />All wells were checked for pH, water level, specific conductance, temperature and the <br />standard groundwater analysis suite. This analysis is attached to this report. <br />Generally, the wells showed no alarming variations in any measured parameter, <br />although specific conductance levels were higher in 1993 for all three wells than those <br />levels measured in 1988. The old Engleville Mine has changed the way that recharge <br />and discharge takes place in the lower Vermejo Formation of the entire area and the <br />Rimrock pit mining did nothing to change the hydrologic balance. No water was <br />encountered in any old workings that were uncovered in the Rimrock pit. All entries <br />were completely dry. <br />Surface Water- Year 1994 <br />During year 1994, the Rimrock Mine was reclaimed. All pit areas were backfilled and <br />recontoured; all topsoil was replaced on the re-contoured area and all site facilities <br />were removed. All disturbed areas were channeled to the sediment pond, so that no <br />disturbed area runoff was allowed to enter Engleville Gulch. As in the previous year, <br />the staff gage in Engleville Gulch recorded no significant runoff events. Mine <br />personnel said that a base flow of a few gallons per minute was noticed in the Spring <br />during snowmelt. <br />Much of 1994 was an extremely dry year, setting low rainfall records throughout much <br />of Colorado during the summer. The sediment pond remained in place throughout the <br />year but did not discharge during the year. There was no evidence that the Mine <br />activities affected the hydrologic balance in any way. <br />