Lower Crystal Creek Falls. Heather Hockett Photo. Crystal Creek Falls is the only 'man-made' waterfall in the park. When the Central Valley Project's Trinity River Division project was designed in the late 1950s and early 60's, an important component was the diversion of a large portion of Trinity River water to Whiskeytown Lake and from there to the Sacramento River. The whole project was completed to increase water supply to farms and cities, provide hydroelectric power, and reduce the threat of flooding. A 17-mile tunnel was excavated to transport the water underground from Trinity Dam to the Judge Francis Carr Powerhouse. The tailings for this project were dumped in the area near Crystal Creek Falls.
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