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VI <br />20. Cumulative distribution function for instantaneous discharge and selenium concentrations <br />measured at Dry Fork Upper Station (station 09095300) near De Beque ........................... 50 <br />21. Summary of likely selenium concentrations for select hydrologic conditions ..................... 50 <br />CONVERSION FACTORS, DATUMS, ABBREVIATIONS, AND ACRONYMS <br />Multiply By To obtain <br />acre-feet (acre-ft) 1,233 cubic meter (m) <br />acre-foot per day (acre-ft/d) 0.01427 cubic meter per second per day (m3/d) <br />cubic feet per second (ft3/s) 1.983 acre-feet per day (acre-ft/d) <br />foot (ft) 0.3048 meter (m) <br />inch (in.) 2.54 centimeter (cm) <br />mile (mi) 1.609 kilometer (km) <br />milligrams per liter (mg/L) 0.000137 tons <br />square mile (mil) 2.590 square kilometer (km2) <br />Acronyms and Abbreviations <br />micrograms per liter (µg2) <br />milligrams per liter (mg/L) <br />Northern Colorado Water Conservancy District (NCWCD) <br />Programmatic Biological Opinion (PBO) <br />U.S. Geological Survey (USGS) <br />Water year-Time period from October 1 to September 30 <br />