The plant leases surplus flow from the north millrace. A flow study determined that during an extreme low-water period in June, 1910, they could still get 4500 hp with an 11-foot head.
This interior view shows the 6 new 320kw Westinghouse umbrella generators that are driven by 74-in. Samson Special water turbines operating at 75 rpm. Four of the units generate 25hz and two generate 60hz. Because the demand for interurban power goes up while the demand for lighting power goes down during the day, the coupled rotating units on the right is the 750kw, 300 rpm frequency convertor. They have enough capacity that all of the output of the plant can be converted to the needed frequency.
The above 6 direct coupled generators occupy the west and center portions of the station. I cropped the west side of the floor plan because it was just more of the direct coupled generators, and I want to concentrate on the east side which contains two horizontal shaft generators.
Below, the lower-right is part of one of the direct-coupled exciters.The unit this side of the frequency converter is the motor-generator exciter.
When I took a picture of the river side, the river was running above normal. The opening on the left (west) side is for the spillway.
John's picture from 2008 shows a more normal river level.
|John Weeks III|
You can see the head of the spillway on the right in this photo that was taken while the plant was still operational.
There was a sheer boom across the forebay that diverted trash into the spillway.
The plant quit operating in 1989, and water no longer flows into the headrace so the water level of the forebay is way below the operational level. I have no idea why the dirt ridge was added to the forebay.