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<br />the east side of the valley. This flow <br />• by the construction of an interceptor <br />discharges into the Animas River north <br />interceptor extends underneath the new <br />length. It is understood that a slurry <br />constructed to isolate this drain from <br />material. <br />has been diverted by <br />train and ditch which <br />of the pond. This <br />pond for part of its <br />trench will be <br />the tailings <br />The water table as it currently exists, based upon somewhat <br />limited data, is shown on Figure No.2. The surface as it <br />er.isted in 1980, when the pond apparently was flooded or in <br />operation is shown on Plate III, as is also the current <br />water level. The data for the 1980 surface were taken from <br />the logs of the test borings completed in the fall of that <br />year. The data far the current, October 1985, water table <br />were obtained from current measurements except for well nos. <br />1, 16 and 22, which have been destroyed. The 1980 water <br />levels have been utilized as there is reasonable agreement <br />between current and 1980 levels in the other wells which <br />were in e>:istence at that time. The present water table <br />under the pond conforms to the local water table; whereas <br />the 1980 data indicates that the water table in the pond <br />imposed a "hump" on the local water table. The current water <br />table suggests that <br />• The present water table is at or less than 2 feet above the <br />base of the tailings. East of the pond it slopes steeply <br />westward, while underneath the pond there appears to be a <br />trough parallel to the course of the river, but passing <br />almost under the center of the old pond, indicating the <br />preferred direction of current ground water flow is parallel <br />to the river, under the old pond and passes southward into <br />the marshland south of the old pond into the area of the <br />breached retention pond. This would indicate that the <br />direction of maximum transmissivity is parallel to the <br />river. This would be expected as the depositional direction <br />of the modern sediments would be parallel to the course of <br />the river. <br />Permeabilities of the tailings materials were calculated 6y <br />constant flow, constant head methods utilizing steady state <br />flow data collected during the injection program. As the <br />data are limited, the results should be considered order of <br />magnitude. The values ranged from <br />~~~ <br />. -11- <br />