The flow in the river is very low now and only portions of the dam's face are covered with flowing water. This allows the hungry ducks to scramble up and down the exposed cement and glean the tasty green weeds and slime that grow there.
The low water also seems to attract children. While I drew this picture a bunch of them scrambled over an expanse of exposed rocks and gravel to the island (not included in this drawing) and explored. They startled a Little Green Heron and brought back memories of something wild …and maybe some poison ivy too :-(