To:     ALL MARINERS
From:   MSO Chicago
Date: 7/17/08
Subject: SHOALING AND RECOMMENDATIONS 692.8 TO 693.4 UMR
NAVNOTICE # 1229

UPPER MISSISSIPPI RIVER
A US ARMY CORPS OF ENGINEERS SURVEY BETWEEN MM 692.8 TO 693.4 UMR
INDICATES SHOALING ON BOTH SIDES OF THE RIVER WHICH RESTRICTS THE
NAVIGABLE DEPTH AND WIDTH OF THE CHANNEL. TOWS WITH A LENGTH
EXCEEDING 600 FT NOT INCLUDING THE TOWBOAT OR MORE THAN 3 BARGES IN
LENGTH SHOULD NOT ATTEMPT TO TRANSIT THE AREA. TOWS EXCEEDING THIS
LENGTH SHOULD TRANSIT THE AREA WITH THE USE OF AN ASSIST VESSEL. ALL
MARINERS ARE REQUESTED TO TRANSIT THIS PORTION OF THE RIVER WITH
EXTREME CAUTION.

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