The segment that includes Mitchell Point Tunnel is one of the last pieces of the puzzle and has been a massive undertaking.
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Get a preview of the Mitchell Point Tunnel, a bold new attraction in the Columbia GorgeOne of the most incredible features of an ambitious recreation corridor is set to open in the Columbia River Gorge. The recreated Mitchell Point Tunnel, the latest addition to the Historic Columbia ...
Gandy Creek travels some 3,000 feet through the sinks as it passes under a spur of Yokum Knob, a summit in the Allegheny Mountains. Its upstream entrance is about 30 feet wide and 15 feet high. The ...
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