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Boating safety tips are available from the
U.S. Coast Guard.
NOTE: During cold periods, gage height and streamflow information may be adversely affected by ice.
Station operated in cooperation with the U.S. Army Corps of Engineers—St. Louis District
determine water level in feet above sea level:
add current gage reading + 300.06 (USGS Spirit Leveling 1927)
add current gage reading + 300.00 (Supplementary Level Adjustment 1955)
add current gage reading + 299.31 (NGVD 29 datum)
add current gage reading + 299.71 (NAVD 88 datum)
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Value Jul 31