Some of our regular walks take us over the Rt 376 bridge downstream of the Red Oaks Mill dam and I try to take a picture whenever we cross.
For reference, two years ago in December 2016:
The dam breast seem from the north (left in above pictures) in December 2018:
Searching for the obvious keywords will produce far more pictures than the subject may deserve.
Getting hydropower from the rubble would require considerable capital investment …