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IMPORTANT GAGES-MIDDLE AND UPPER MISSISSIPPI RIVER TRIBUTARIES--Continued

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IMPORTANT GAGES-MIDDLE AND UPPER MISSISSIPPI RIVER TRIBUTARIES—Continued

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1 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 Gage located at mile 327.1 prior to completion of controlling works lock.
8 Records are not continuous from date of establishment.

Present zero, 586.11, 1929 adjustment.
10 793.68 prior to Jan. 1, 1934, at same location.
11 0.8 mile below present gage.

13 Lowest observed; low-water records incomplete. 13 1941 mileage. 14 Distance from Mississippi River. 16 Gage zero raised 30 feet June 1940 (stages shown are in present gage datum). 16 1879, 1887, and 1891 also. 17 Exact date not known but occurred after 1931. 18 Date unknown. 19 Old gage 1934 to 1942. Present gage established 1941, 20 Old gage 1934 to 1941. Present gage established 1941. 21 Same gage as "Mississippi River at Prescott.

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