Section 117.475 - Little (Petit) Caillou Bayou(a) The draws of the S58 bridge, mile 25.7 at Sarah, and the Terrebonne Parish (Smithridge) bridge, mile 26.6 near Montegut, shall open on signal; except that, from 9 p.m. to 5 a.m., the draws shall open on signal if at least 12 hours notice is given.(b) The draws of the Terrebonne Parish (DuPlantis) bridge, mile 29.9 near Bourg, and the S24 bridge, mile 33.7 at Presquille, shall open on signal if at least four hours notice is given. The draws shall open on less than four hours notice for an emergency, and shall open on signal should a temporary surge in waterway traffic occur.CGD8-86-02, 51 FR 31113, Sept. 2, 1986