I hate to rain on everyone’s parade but the Kinzua (Kin-Zoo) reservoir had little to with either flood control or power generation. You need to think more sinister. I know. I grew up there.
I guess we also have to read your mind. Hmmmm. I am trying. No picking up anything.
True; the Kinzua Dam is on the Allegheny River, in the Allegheny National Forest. The upper reservoir at Seneca Plant is a man-made "pond", with an asphalt-lined bottom, constructed purely to hole the pumped storage water from the plant, to be released when generation was brought on-line, and flows out into the Allegheny River from the output of the generators. The drop in elevation from the Upper Reservoir to the River is about 700 ft. or so, which gives the "head" for generators to function.