White River Falls was a hydroelectric plant that supplied Sherman and Wasco Counties with power from 1910 until 1960. Much of the damn and associated hydropower bulidings and equipment are still standing at the base of the valley, which you can see in the picture below.
The waterfall itself is about 90 feet, and while in the summer the water flow doesn’t seem like much, in the spring it has enough volume to have earned the nickname of ‘The Niagra Falls of the West’.
The park is free for use, the upper park includes the parking lot and a lookout as well as a series of placards explaining the history of the dam. We did not hike down due to the heat and timing but the trail leads off from the upper lot, down along the cliff, past the hydro building and back along the river. The trail then goes onto state land and private land. There are quite a few resources out there discussing both history and usage of the area, this site World of Waterfalls covers it nicely.
I would very much like to go back in the spring to experince the waterfall at its height and also in more friendly weather to hike down into the canyon. It was a very beauitful spot, and just off the main highway from Maupin so if you find yourself in the area with a little extra time I high suggest the stop.