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<br />The hydrologic monitoring is conducted by Cyprus Yampa Valley Coal Corporation <br />personnel. The water quality analyses were performed by ACZ Laboratories (Formerly <br />Bookcliffs) of Steamboat Springs, Colorado. Until the 1989 water year the U.S. <br />Geological Survey (USGS) also collected and analyzed the water samples for three <br />sites. Beginning in the 1989 water year Cyprus collected the samples and ACZ <br />laboratories analyzed the samples. <br /> <br />• <br />- z - <br />