Laserfiche WebLink
Slurry Wall Design Report <br /> Loloff Pit <br /> 5/24/2016 <br /> Page 6 of 16 <br /> investigation determined the presence of localized areas containing very hard limestone <br /> concretions. <br /> All packer testing was completed in the siltstone and claystone rock. The hydraulic conductivity <br /> of the bedrock ranged from 2.7 x 10-6 centimeters per second (cm/sec)to 8.2 x 10-5 cm/sec <br /> when measurable by water pressure testing in 7 tests. For some intervals of the water pressure <br /> tests, the apparent hydraulic conductivity of the bedrock was below the sensitivity of the water <br /> pressure tests, as indicated by no measurable flow during the test. Table III presents a <br /> summary of the measured hydraulic conductivity for the bedrock. <br /> Groundwater in the alluvial aquifer was encountered from 22 ft to 55 ft bgs. Groundwater <br /> elevations ranged from 4603.3 ft to 4622.6 ft. Groundwater elevations may have been impacted <br /> by local dewatering operations inside of the active mine. Due to the dewatering drawdown, the <br /> elevations would have decreased from the native groundwater table. <br /> BRIERLEY <br /> ASSOCIATES <br /> Creating Space Underground <br />