I guess they are chasing after all of those thousands and thousands of logs that have been floating down the river for the past couple of weeks. All that flotsam is a pain for most boaters, but 'tis an ill wind that blows no good. I imagine these guys have been and will be pretty busy cleaning it all up.
We have had a lot of rain in May and early June. Now the dams are full and there's nowhere for all that water to go but past - and beneath - our house. The high water washes a lot of debris off of the banks. Sometimes whole, large trees will float by. Today it is bank to bank with smaller flotsam.
The rains have stopped and so maybe the river will start to recede now.