addition to the process resulting in over 50 closures of the channel to complete. The tunnel was removed by 1998 and its former structure was salvaged as paving aggregate. References External links Baytown Tunnel, SH 146, and the Fred Hartman Bridge on TexasFreeways.com for historical photos of the tunnel Tunnels in Texas Crossings of the Houston Ship Channel Transportation buildings and structures in Harris County, Texas Greater Houston Galveston Bay Area Tunnels completed in 1953 Road tunnels in the United States