Laserfiche WebLink
appears to mirror the quality of the adjacent spoil water. It appears that the elevated EC and iron readings are <br />associated with the water that has pooled in the mine sump, which is in contact with the overlying Marine Shale. <br />This contact has provided the opportunity for additional salts and iron to be leached from this unit. The pumping <br />of the sump should see a decrease in the elevation of the pool over time, with an anticipated decrease in the EC <br />and concentration of iron in the effluent. <br />Subsidence: During 2012, no ponds or surface creeks were undermined or subsided. No subsidence ponding <br />overlying historical mined areas along Foidel Creek, or Middle Creek was evident in 2012. No ponding was <br />evident along Fish Creek in 2012, with the exception of a small permanently ponded area around alluvial well <br />AVF -15 that occurred around 2003. No significant/adverse water quality impacts relating to subsidence were <br />evident in 2012. <br />19 <br />