• Limestone and other bedrock in the area are tight rock with very low porosity. This means that the rock can restrict the movement of water. By understanding groundwater bedrock conditions, we know we can use this material as a natural barrier to help block water from areas it is not wanted.
• Naturally occurring karst or caves are avoided or mitigated where they affect the operation. Where small cracks may allow water ‘seeps’; these seeps are grouted-off to help prevent water from being introduced into the operations.