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U
USFS - (2) United States Forest Service
USGS - (2) United States Geological Survey
underground workings - (4) any anthropogenic underground
excavation, including adits, crosscuts, declines, drifts, inclines,
levels, portals, raises and shafts. Also referred to as galleries
in other countries.
ungulates - (3) hoofed, cud chewing animals, including cows,
sheep, giraffes, deer, camels, horses, tapirs, elephants, rhinoceroses,
and swine.
uplands - (3) lands at higher elevations than alluvial plains
or low stream terraces; all lands outside the riparian-wetland and
aquatic zones.
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