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The water levels can indicate if the mine has had an effect on the water table in the Vermejo of the Immediate area. Other than a slight increase in the water level of Well 29-4 in the March 1994 sample, the only unusual item in the data is the tact [hat the Montoya well was dry during the 12/94 sample. The Engleville Mine discharge point (called EMD) vas also dry in December of 1994. This is not a cause for alarm due to the follo'vving reasons: 1) the Montoya well is hand dug and its total depth is only approximately 60 feet. Normally, water levels are 44-57 feet, so water levels do not need to drop much for the well to run dry. As is seen from the previous graph, some pre-mine well levels almost reached well bottom, 2) the summer of 1994 produced record droughts which always have a delayed effect on ground water levels. The Engleville Mine Discharge (EMD) also went dry in December of 1994, which is located on the opposite side of Engleville Gulch from the Rimrock pit and could not have been affected by the mine operation or reclamation, and 3) if the mine affected levels in the Montoya well, it should also have affected levels in the USGS well, which is located between the Montoya well and the Rimrock pit. The samples show no significant change in levels at the USGS well. Below is shown a chart showing the specific conductance readings of the three wells. • Rimrock Mine Groundwater Well Conductivity U m p9 G E N O E U 0 z O U e'~~ F: •~ .w..M1:'ra . ~r, "tt:.x Monlo a Well ry 12/94 6/88 8/88 10/88 12/88 3/89 5189 7/93 9/93 12/93 1/94 4/94 7/94 12/94 e1129-4~Montoya Well++~~,USGS Well 5000 4500 40D0 3500 3000 2500 2000 1500 1000 500 All samples 5189 and earlier are before mine startup • 2 07(I) Page 1 1 1 / 1 Z/95 -r ~ ~ '.