Pond repair time lapse

In November 2016, I hired my neighbor to repair the dam that makes my pond. He has lived here all his life. (He's in his upper 60s.) He said this pond was old when he was a boy. Beavers had burrowed through the dam, and trees had fallen, taking big chunks of the dam with them. He repaired the dam, and deepened the pond. Here is a time-lapse movie of one day's work.