Unfortunately, snow and ice is, well, slippery. That's kinda why snowplows get rid of it.
The driver found this out the hard way, when the plow slid straight down the ramp, flew off the end onto the ice, broke through the lake surface and sunk to the bottom.
His boss would have been less than impressed at $200,000 worth of plow on the bottom of a lake!
More at the Wis10 site.
~ Elisa
PS. Image is of Lake Michigan.
