Hi Penny, Don't know about Rochester but Toronto had lines of trucks filled with snow that needed to be dumped. I understood Kays explanation and that explains the fish kill in the spring. Never had figured that out before. I thank you Kay!! I think if they were allowed to dump in the great lakes it would be mega- amounts of snow. . .particularly this winter . . .and the salt and oil and general road debris would be considerable. Even our little town of Peterborough which doesn't move that much snow off the road has a large field where they dump the snow and it takes till june sometimes for the mountains to melt . . . . nothing grows in that field in the summer so that should tell us something. Jill Zone 5 (in a good year) Peterborough, ON, Canada rfyffe@peterboro.net ***********************