Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.117.285 Grand Canal

(a) The draw of the Lansing Island bridge, mile 0.7, shall open on signal, except that during the evening hours from 10 p.m. to 6 a.m. from Sunday evening until Friday morning, except on evenings preceding a Federal holiday, the draw shall open on signal if at least 2 hours notice is given.

(b) The draw of the Tortoise Island bridge, mile 2.6, shall open on signal;  except that from 10 p.m. to 6 a.m. from Sunday evening through Friday morning, the draw shall open on signal if at least 2 hours advance notice is given. From 10 p.m. to 6 a.m. on Friday and Saturday and on evenings immediately preceding Federal holidays, the draw shall open on signal if at least 30 minutes advance notice is given.