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published Oct 1998
USDA Forest Service,
Federal Highway Administration
The Missoula Technology and Development Center (MTDC) was asked to find a good way to maintain a 40-mile (64-k) motorcycle and all-terrain-vehicle (ATV) trail on the Francis Marion National Forest in coastal South Carolina. Heavy use leaves a washboard surface that progresses to mounds and gullies several feet across. These are called "whoop-de-doos," and trail users find them both unpleasant and unsafe.
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