Emptying water from the Charles River

We have had significant rainfall over the past weeks. The Charles River empties into Boston harbor and the level is regulated by the locks and associated dam. Rainfall has been so high that the locks were open to allow the necessary waterfall. Normally there is a heavily used pedestrian pathway over the locks from Boston to Charlestown. No path today. In the background I pan to show the Zakim Bridge, which takes I-93 over the river and then under Boston, as well as the TD Garden, the home of the Bruins and the Celtics