The posted coordinates are not for the actual cache.
This is one of those dam history caches where you'll have to do a little dam research to come up with the coordinates for the final. The majority if not all of your research will come from two information signs (coordinates posted below as additional waypoints) located in an area with plenty of parking and a couple of nice picnic tables.
The final coordinates are
N35 37.ABC
W084 47.DEF
A) Built by Baldwin Locomotive works, each of the complete, original turbines provided 4A,000 horsepower..."A"
B) This turbine, the one from Unit B
C) Dam Height: C4 Meters (XXX feet).
D) D = How many turbines are on display here?.
E) Dam Length: XXX meters (E,960 feet).
F) Reservoir Length: 1F5 kilometers (XX miles).
The final is a pill bottle close by.