33 C.F.R. § 117.239
Lewes and Rehoboth Canal
(a) The draw of the Savannah Road/SR 18 Bridge, at mile 1.7, in Lewes shall open on signal if at least four hours notice is given.
(b) The draw of the SR 14A Bridge, at mile 6.7, in Rehoboth shall open on signal if at least 24 hours notice is given.