river

Actually, it doesn't look that troubled. Also, it's more like "through" troubled water, not under it.

Three Department of Public Works employees painting a bridge over a creek. Two of them set up a work platform made out of two stepladders and a plank. The third, a little smarter that those two and probably a supervisor, elected not to use the work platform and erected his own stepladder in the creek. At least they have their hip-waders on.