1 Gauge is on Ohio River, 2.2 miles above Mississippi River. Excluding Ohio River. 3 1929 adjustment. 2 Records in H. Doc. 263, 59th Cong., 1st sess. 3 Mean tide, New York datum. 4 Assumed high water. 5 Miles above Ohio River. 6 Lake Michigan low-water datum, 578.5 feet above mean tide, New York datum. 7 Gauge located at mile 327.1 prior to completion of controlling works lock. Records are not continuous from date of establishment. 9 Present zero, 586.11, 1929 adjustment. 10 793.68 prior to Jan. 1, 1934, at same location. 11 0.8 mile below present gauge. 12 Lowest observed; low-water records incomplete. 13 1932 mileage. 14 1939 mileage (extension from 1932 mileage, mouth to Rulo, Nebr.). |