Other areas in the power plant include a machine shop, control room, offices and a small parking area. As you can imagine, it is a huge underground complex. The Upper Reservoir Situated atop Northfield Mountain, the upper reservoir holds almost 6 billion gallons of water. Since the water level fluctuates when the plant is operating, it is not a safe place for recreation. The reservoir is fenced in, with no swimming, boating or fishing allowed.
Tours begin with a short informal video and are free of charge .
Seating is on a first come, first served basis. Children under the age of ten are not permitted on the generating station tour but are welcome aboard the reservoir tour. See our newsletters for more details.