Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.117.850 Black River

(1) From 7 a.m. to 6 p.m., Monday through Friday, except legal holidays, the draw need open only on the hour and half-hour for pleasure craft;  however, the draw need not open for pleasure craft at 8 a.m., 3 p.m., 4 p.m. and 5 p.m. For commercial vessels the draw shall open on signal as soon as possible.

(2) From 11 a.m. to 6 p.m., Saturdays, Sundays and legal holidays, the draw need open only on the hour and half-hour for pleasure craft. For commercial vessels the draw shall open on signal as soon as possible.

(3) From 11 p.m. to 7 a.m., seven days a week and legal holidays, no bridgetender is required to be in constant attendance and the bridge shall open on signal for pleasure craft and commercial vessels if at least a one hour advance notice is given.