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1 <br />' the complete data set and the 1990 water year data are presented on Tables 4 to 60 and figures <br />3 to 54. Presently, the hydrologic monitoring is conducted by Cyprus Yampa Valley Coal <br />Corporation personnel, however, one surface water site is monitored for flow rate by the U.S. <br />Geological Survey (USGS). Almost all of the water quality analyses were performed by ACZ <br />' Laboratories (formerly Sookcliffs) of Steamboat Springs, Colorado. Unless otherwise indicated, <br />reference to a year means a water year. Until the 1989 water year the USGS collected and <br />' analyzed the water samples for one site. <br /> <br /> <br /> <br />1 <br />-~ <br /> <br /> <br />', <br /> <br />i' <br />I 1 <br />i~ <br />-2- <br />i~ <br />