4 years ago after the snowmagedon winter in Calgary, the city of Calgary built a snow dump located near 32 Ave and deerfoot trail next to the white dome tent at the golf course, the city sends loaders and trucks out to remove snow from neighborhoods and hauls it to the snow dump to be piled up until spring when it can melt, the snow is not the only thing loaded on those trucks, all of the salt that the city lays down is collected and dumped with the snow, when the snow melts in the spring,the melt water containing all of that salt (and oil and whatever else was in the snow) flows from the snow dump directly into Nose Creek that then flows into the Bow river near the science center, last year the banks below Nose Creek on the Bow river had snow and ice free banks weeks before the banks of the Bow above Nose Creek.
I have not seen this metioned but I think there is some correlation to the declining fish numbers since the snow dump went into use.
Next spring have a look at the water flowing out of Nose Creek during the melt...it smells like the ocean.
This mountain of snow salt and oil lasts long into the summer, usually August, the remains of what's left are there right now sitting on the asphalt if anyone wants to see the disgusting mess, I can't imagine this not having a serious negative impact on the health of Nose Creek and the Bow river.