We used to dump it on the lake. Of course they cant do that anymore because it’s somehow worse for the environment than letting the same exact snow melt with all it’s same exact contaminants and flow into the same exact lake ‘naturally’.
They still dump snow in rivers here when it gets like this (probably because it will end up there anyway through the storm drains). The logistics would still make that difficult in my area; cars are parked on top of frozen snow, and the vehicles to remove it can’t fit into many of the spots from which it needs to be taken.