33 CFR §117.911

1. (a)General. Public vessels of the United States and tugs with tows, upon proper signal, will be passed through the drawspan of each drawbridge listed in this section at anytime.
2. (b)Little River Bridge across Upper Litte River, mile 347.3, at North Myrtle Beach. The draw shall open on signal, except that from 7 a.m. to 9 a.m. and 4 p.m. to 6 p.m., Monday through Friday, except Federal holidays, the draw will open on the hour and half-hour.
3. (c)Ben Sawyer (SR 703) bridge across Sullivan's Island Narrows, mile 462.2 between Sullivan's Island and Mount Pleasant. The draw shall open on signal; except that, the draw need not open from 7 a.m. to 9 a.m. and from 4 p.m. to 6 p.m. Monday through Friday except Federal holidays. On Saturdays, Sundays, and Federal holidays from 9 a.m. to 7 p.m. the draw need open only on the hour.
4. (d)SR 171/700 (Wappoo Cut) Bridge across Wappoo Creek, mile 470.8, at Charleston, SC. The draw shall open on signal; except that the draw need not open from 6 a.m. to 9:29 a.m. and 3:31 p.m. to 7 p.m., Monday through Friday, except Federal holidays. Between 9:30 a.m. and 3:30 p.m., Monday through Friday, except Federal holidays, the draw need open only once an hour on the half hour.
5. (e)Lady's Island (Woods Memorial) Bridge, across the Beaufort River, mile 536.0, at Beaufort, SC. The draw shall operate as follows:
   1. (1)Monday through Friday, except Federal holidays:
      1. (i)From 6 a.m. to 9:29 a.m. and 3:31 p.m. to 7 p.m., the draw need not open to navigation; and,
      2. (ii)Between 9:30 a.m. and 3:30 p.m., the draw need open only once an hour on the half hour.
   2. (2)At all other times the draw shall open on signal.