33 CFR § 117.191 - San Joaquin River.
(a) The draw of the Port of Stockton railroad bridge, mile 39.7 at Stockton, shall open on signal if at least 12 hours notice is given to the Port Director.
(b) The draws of the U.S. Navy Draw-bridge, mile 39.8, Burlington Northern Santa Fe railroad bridge, mile 40.6, and California Highway 4 bridge (Garwood Bridge), mile 41.6, need not be opened for the passage of vessels. The owners or agencies controlling the bridges shall restore the draws to full operation within six months of notification to take such action from the District Commander.
(c) Drawbridges above the Old River junction need not open for the passage of vessels.