I'm sure it has. About 50% of that area is underlain by peatlands, including the forested areas, probably at a mean depth of three or four metres. These have taken 3,000 or 4,000 years to accumulate. They act like a giant sponge, absorbing snowpack and the rainfall that falls in thunderstorms and releasing the moisture slowly over time. Industry knows full well, based on research that they have funded by a number of consultants, that they can't restore that sort of ecosystem, not unless they wait 3,000 or 4,000 years. There's no hope of reconstructing the hydrology of those systems, or for that matter the aquifers, because the layers are dug up and put in a pile; there's no attempt to put them back in strata that would restore the aquifers.
This probably wouldn't be a big concern if it were in a small area, but of course it's no longer a small area. I predict it will disrupt the whole hydrology of that lower Athabasca system.