Bethlehem Steel's shipyard in Beaumont, Texas, was originally Beaumont Shipbuilding & Dry Dock Company, a small shipbuilder which had been in continuous operation since at least 1918.  It was acquired by Pennsylvania Car & Foundry, of Sharon, Pennsylvania, in 1922, and renamed Pennsylvania Shipyards.  It was an active builder of tugs and barges when the WWII emergency program began.  Its 2 ways were increased to 5 in the second wave of shipbuilding expansion.  Bethlehem Steel acquired it in 1948 and developed it as a major designer and builder of jack-up drilling rigs.  It struggled for work after the rig market collapsed and Bethlehem sold it to Trinity Industries in 1989.  Trinity operated it as both a shipbuilder and a ship repairer for five years but in 1994 converted it to railcar construction.  In 2006, Trinity sold it to Chicago Bridge & Iron for use as a fabrication base for CBI's contracts to construct LNG import terminals.  See the shipyard from the air on Google here.  There are many breaks in the series of hull numbers, especially in the early years: if anyone has a hull number list or can fill any of the gaps, please e-mail tim@coltoncompany.com.