The permits issued to create these ponds include a series of conditions, one of which is that a series of wells must be installed to control any leaks. Permit holders must be able to detect and assess any leaks into groundwater. The wells are monitored constantly, and reports are submitted regularly. As I explained, Alberta's Environment Department conducts its own inspections and informs us of the results.
The only way these ponds could have an impact on areas where there are fish is if there is seepage of groundwater, which is, as we know, is an important source of water for the river itself.