NAVNOTICE# 2027 - Ice conditions on UMR and ILR

To: ALL MARINERS
From: MSO Chicago
Date: 1/4/10
Subject: Ice conditions on UMR and ILR
NAVNOTICE # 2027

A. ZONES 1-28 (MILES 109.9 - 857.6 UMR) ARE IN THE ACTION PHASE FOR
ICE CONDITIONS IN ACCORDANCE WITH THE UMR WAP ANNEX.
B. ZONES 1-7 (MILES 0.0 - 180.9 ILR) ARE IN THE ACTION PHASE FOR
ICE CONDITIONS IN ACCORDANCE WITH THE ILR WAP ANNEX. NAVIGATION HAS
BEEN RESTRICTED TO ONE WAY TRAFFIC THROUGH PEORIA LAKE MM 169.0 -
179.0 ILR. THIS WILL HELP MAINTAIN THE CURRENT ICE TRAIL AND
PREVENT SHEET ICE FROM BREAKING OFF THE BANK. ALL MARINERS ARE
REQUESTED TO PROCEED WITH EXTREME CAUTION WHEN
TRANSITING THIS AREA.
C. SHEET ICE AND HEAVY ICE GORGES CAN BE EXPECTED THROUGHOUT THE
UPPER MISSISSIPPI RIVER AND ILLINOIS WATERWAY. CHANNELS MAY BE
BLOCKED BY ICE IN SOME LOCATIONS. MARINERS ARE REQUESTED TO ENSURE
THAT FLEETS ARE CLOSELY MONITORED AND MOORING LINES ARE ADEQUATELY
SECURED, AND TO EXERCISE DUE CAUTION TO AVOID SINKING BARGES AND
HIGH LOCALIZED FLOW OR OUT DRAFT CONDITIONS DUE TO WATER BYPASSING
A TEMPORARY DAM THAT MAY BE CAUSED BY AN ICE GORGE.
D. MARINERS SHOULD BE AWARE THAT BUOYS MAY BE UNRELIABLE DUE TO
ICING CONDITIONS. ICE FLOWS RENDER REFLECTIVE MATERIAL INEFFECTIVE,
AND MAY DRAG BUOYS OFF STATION AND SEVER BUOYS FROM THEIR MOORINGS.