117.477—Lower Atchafalaya River.
The draw of the St. Mary Parish bridge, mile 26.8 at Patterson, shall open on signal from 5 a.m. to 9 p.m. From October 1 through January 31 from 9 p.m. to 5 a.m., the draw shall open on signal if at least three hours notice is given. From February 1 through September 30 from 9 p.m. to 5 a.m., the draw shall open on signal if at least 12 hours notice is given.