33 C.F.R. § 117.371
Savannah River
(a) The draw of the CSX Transportation Railroad Bridge, mile 27.4 near Hardeeville, South Carolina, shall open if at least a 24-hour advance notice is given. Openings can be arranged by contacting CSX Transportation at 1-800-232-0144.
(b) [Reserved]
(c) The draw of the Seaboard System Railroad bridge, mile 195.4 near Augusta, shall open on signal if at least three hours notice is given.