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Table 1. Total discharge and water quality in the Yampa River near Maybell, Colorado, <br />during selected low, medium, and high water years. <br /> <br />Water Yeara Discharge <br />(m3/s) Hardness <br />(mg/L) Alkalinity <br />(mg/L) <br />pH Dissolvedb <br />Copper (µg/L) Dissolvedb <br />Zinc (µg/L) <br />1980-1981 7911 91 75 8.0 ND ND <br />1988-1989 9188 190 149 8.7 1- 4 BD- 9 <br />1979-1980 18267 130 100 8.2 2-58 BD-70 <br />1981-1982 19600 56 54 7.8 2- 7 BD-27 <br />1984-1985 23507 180 93 8.9 2- 3 7-17 <br />1983-1984 31349 100 129 8.4 BD- 4 BD-18 <br />WWater year begins October 1 and ends September 31. <br />bRange of all measurements taken for the water year. <br />ND = No data. <br />BD = below detection limit. <br />32 <br />