OK, who verified this was a hydro-electric power plant? First of all, Solar energy, Hydro-electric energy, and Nuclear energy all imply producing energy using the force of a natural resource. Such as getting electricity from the energy of the sun, getting electricity from the energy of Nuclear fission, or getting electricity from the energy of moving water.
Hydro-electric Power plants utilize the force of moving water, which is why they are placed or built at a rivers edge, or utilize a dam between two bodies of water. This censored location is at the very southern tip of Woburn lake, a quarter of a mile due east of a Rehabilitation Center, Medical park and Golf Course. There is absolutely no current in this lake let alone any at the tip of the southern end.
The question is, if the government doesnt find it necessary to censor the view of Keflavik Naval Air Station in Iceland, or censor the white house or views of other military installations (mostly because the aerial photos are typically 2 - 3 years old and no longer of any importance as to its location) then why would some business want to censor theirs? Especially nestled in a really nice community with a very decent soccer field across the street (to the east) from it, a golf course to its west, two very nice apartment complexes and some local businesses.The size of the place seems to have no significance since its about 930ft by 500ft. It obviously has no secretive value because of it's visibility in the community and there is no way to stop a joyride in a Cessna from flying over head either.
My guess is someone is trying to create a conspiracy theory out of nothing.