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
USGS 05587498 Mississippi River Pool Lock and Dam 26 at Alton,IL
*** There are no data available on the Waterdata system for the time period specified,
although data may be available in the files of the local USGS office operating the station.