Another bulldozer sank while trying to pull the bulldozer in the frozen river
failure to tow riverside water tanker with bulldozer was videotaped
on a gentle slope, the dozer, whose brakes did not work, crashed into the vehicle behind it.
Dozer going from one point to another to work was submerged by icebreaking
Dozer working on the edge of the cliff lost control and fell into a stream