72 Mill St, Bruceton Mills, WV 26525
Bruceton Mills waterfall is the result of a manmade dam. I'm still trying to find some history and get a photo, but it's right downtown on Mill St. There appears to be parking riverside off of Mill St. Pretty big space. These pictures are screen caps from Google photo credit is to Jeffrey Pawlak.
The Bruceton Mills Dam includes fishing and boating access to Big Sandy Creek and a shelter. Padlz, a canoe and kayak rental business, offers boat rentals nearby.