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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—Rock Island District
To determine water level in feet above sea
add current gage reading + 473.80 (NGVD 29 Datum)
add current gage reading + 473.70 (NAVD 88 Datum)