When I was working in Cleveland - driving from Clark Ave. Yard Office to Whiskey Island, West 3rd Street crossed the Cuyahoga at 3 different locations - it wasn’t unheard of for a trip between the two point to be delayed by the same boat passing through each of the drawbridges.
The B&O itself had three drawbridges between Clark Ave. Yard and the Penn Central Interchange at Whiskey Island. Bridge 460 was a Train Order Station and manned around the clock. Bridges 463 and 464 had one bridge operator for the pair of bridges and worked 3 PM to 11 PM (or as late as necessary for the Yard crew to return to Clark Ave. after making the interchange).
162.205Suisun Bay, San Joaquin River, Sacramento River, and connecting waters, CA.(a) San Joaquin River Deep Water Channel between Suisun Bay and the easterly end of the channel at Stockton; use, administration and navigation—(1) Maximum speed. The maximum speed for all ocean-going craft shall not exceed 10 miles per hour above the lower end of New York Slough, seven miles per hour above Criminal Point, or five miles per hour while passing any wharf, dock, or moored craft. As used in this paragraph, the speed of a vessel when navigating with the current shall be its rate of movement in excess of the velocity of the current.
New York Slough is roughly Antioch/Pittsburg. I couldn’t fine Criminal Point, but did find a “Prisoner’s Point,” possibly one in the same. While perusing the topo map, however, I did find “mile markers” for the Stockton channel. Mile Zero is where the Stockton and Sacramento deep water channels diverge as they leave Suisun Bay. Stockton is Mile 40.
Using the mandated 5 MPH for passing wharves, etc, as a reference (funny they didn’t use knots), that stretch would be an eight hour trip, maybe less. The transit from the Golden Gate Bridge to that point may be similar, probably less.