U.S. DEPARTMENT OF THE INTERIOR Gale A. Norton, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director

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Date: 2002-06-21 09:38:41		U.S. DEPARTMENT OF THE INTERIOR Gale A. Norton, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director Add to Reading List Source URL: vt.water.usgs.gov Download Document from Source Website File Size: 23,93 KB Share Document on Facebook