Section 117.189 - Sacramento River(a) The draws of each bridge from Isleton to the American River junction except for the Sacramento County highway bridge across the Sacramento River, mile 46.0 at Freeport, shall open on signal from May 1 through October 31 from 6 a.m. to 10 p.m. and from November 1 through April 30 from 9 a.m. to 5 p.m. At all other times, the draws shall open on signal if at least four hours notice is given to the drawtender at the Rio Vista bridge across the Sacramento River, mile 12.8.(b) The draw of the Sacramento County highway bridge, mile 46.0 at Freeport, shall open on signal from May 1 through September 30 from 9 a.m. to 5 p.m. At all other times, the draw shall open on signal if at least four hours notice is give to the drawtender at the Rio Vista Bridge across the Sacramento River, mile 12.8.(c) The draws of the California Department of Transportation bridges, mile 90.1 at Knights Landing, and mile 135.5 at Meridian, shall open on signal if at least 12 hours notice is given to the California Department of Transportation at Marysville.(d) The draws of the bridges above Meridian need not be opened for the passage of vessels.USCG-2011-1138, 77 FR 74777, Dec. 18, 2012