33 C.F.R. § 117.661 Duluth Ship Canal (Duluth-Superior Harbor).
Title 33 - Navigation and Navigable Waters
The draw of the Duluth Ship Canal bridge, mile 0.1 at Duluth, shall open on signal; except that, from January 1 through March 15, the draw shall open on signal if at least 24 hours notice is given. The opening signal is one prolonged blast, one short blast, one prolonged blast, one short blast. If the Duluth Ship Canal Bridge is disabled, the bridge authorities shall give incoming and outgoing vessels timely and dependable notice, by tug service if necessary, so that the vessels do not attempt to enter the canal. Vessels shall be given precedence over highway or railway traffic at all times.
Title 33: Navigation and Navigable Waters
PART 117—DRAWBRIDGE OPERATION REGULATIONS
Subpart B—Specific Requirements
Minnesota
§ 117.661 Duluth Ship Canal (Duluth-Superior Harbor).
