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<br />- " <br />o <br />n <br />N <br />c:J <br />o <br />o <br /> <br />.;.; <br /> <br />CONVERSION FACTORS AND VERTICAL DATUM <br /> <br />Multiply By To obtain <br />acre-foot (acre-ft) 0.001233 cubic hectometer <br />cubic foot per second (ft? Is) 0,02832 cubic meter per second <br />cubic foot per day (ft?/d) 0,02832 cubic meter per day <br /> " <br />foot (ft) 0.3048 meter ~ <br />foot per day (ftfd) 0.3048 meter per day <br />inch (in.) 25,40 millimeter <br />mile (mi) 1.609 kilometer <br />square foot (ff) 0.09290 square meter <br />square mile (mi') 2,590 square kilometer <br />ton per year (ton/yr) 0.9072 metric ton per year <br /> <br />SEA LEVEL <br /> <br />In this report, "sea level" refers to the National Geodetic Vertical Datum of 1929 (NGVD of 1929, <br />formerly called "Sea-Level Datum of 1929"), which is derived from a general adjustment of the first- <br />order leveling networks of both the United Slates and Canada. <br /> <br />vi <br />