Aspect
Potential Impact
Risk Rating
Risk Controls
Residual Risk Rating
Treatment
L
C
R
L
C
R
tailings properties are similar as they originate from the same processing plant. Rehab methodology well defined to achieve a safe, stable and non- polluting landform. The proposed activity will result in the reduction of contaminant sources via the excavation and placement of historical ARD generating mine waste into TSFs When tailings are appropriately managed in a TSF, the geochemical properties of the treated tailings are not expected to cause harm to the receiving environment TSF designed by RPEQ in accordance with DETSI guidelines
Adverse effects on the environmental values of and due to unplanned releases or discharges, including spills and leaks of contaminants
Potential impacts on land from construction and operation of the Upper Mundic Gully TSF are unlikely
Possible Moderate 13
Unlikely Moderate
9
given the significant existing disturbance within the area
associated with the Western Dump placement and construction of the water diversion tunnel. The construction of the Upper Mundic Gully TSF will likely improve impacts to land as the currently exposed face of the Western Dump will be sealed.
and ANCOLD best practice Annual regular maintenance
inspections in accordance with EA conditions in Schedule H and the Manual for Assessing Consequence
Categories and Hydraulic Performance of Structures (ESR/2016/1933) .
Nature conservation
Clearing of potential, but degraded, habitat for several MSES
Likely
Moderate 17
Pre-clearance fauna surveys will be undertaken by suitability qualified and experiences persons to identify individual fauna at direct risk from clearing
Likely
Insignificant 7
Considering the historical disturbance and degraded nature of the project area, including existing
ARD contamination in soil, the modified hydrology, and the presence of dense patches of
Project number: 25B061
Page 209
Powered by FlippingBook