Section 117.451 - Gulf Intracoastal Waterway(a) The draw of the Lapalco Boulevard Bridge, Harvey Canal Route, mile 2.8 at Harvey, shall open on signal; except that, from 6:30 a.m. to 8:30 a.m. and from 3:45 p.m. to 5:45 p.m. Monday through Friday except holidays, the draw need not be opened for the passage of vessels.(b) The draw of the SR 23 bridge, Algiers Alternate Route, mile 3.8 at Belle Chasse, shall open on signal; except that, from 6 a.m. to 8:30 a.m. and from 3:30 p.m. to 5:30 p.m. Monday through Friday, except Federal holidays, the draw need not be opened for the passage of vessels.(c) The draw of the SR 315 (Bayou Dularge) bridge, mile 59.9 west of Harvey Lock, at Houma, shall open on signal; except that, the draw need not open for the passage of vessels Monday through Friday except Federal holidays from 6:30 a.m. to 8:30 a.m., from 11:45 a.m. to 12:15 p.m., from 12:45 p.m. to 1:15 p.m. and from 4:30 p.m. to 6 p.m.(d) The draw of the SR 319 (Louisa) bridge across the Gulf Intracoastal Waterway, mile 134.0 west of Harvey Lock, near Cypremort, shall open on signal if at least 24 hours notice is given.(e) The draw of the Louisiana highway bridge, mile 243.8 west of Harvey Canal Locks, shall open on signal when more than 50 feet vertical clearance is required, if at least four hours notice is given to the Louisiana Department of Highways, District Maintenance Engineer, at Lake Charles.CGD 82-025, 49 FR 17452, Apr. 24, 1984 For FEDERAL REGISTER citations affecting §117.451, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.