George & Cynthia Mitchell Memorial Causeway

 bridge, road bridge

The George & Cynthia Mitchell Memorial Causeway is a set of bridges in Galveston County, Texas. Two of the routes carry the southbound and northbound traffic of Interstate 45, while the original causeway is restricted to rail traffic. The only free roadway access point to Galveston Island, the causeway carries traffic over Galveston Bay and the Gulf Intracoastal Waterway.

The original causeway was built in 1912 and carried both rail and auto traffic. The auto traffic was transferred to new causeways built to the west in 1939, leaving the original bridge for rail traffic (the original route was listed on the National Register of Historic Places in 1976).

Construction of replacement bridges for both auto routes began in 2003 with completion of the new northbound bridge in 2005. The construction of a new southbound bridge began in 2006, however Hurricane Ike delayed completion until November 2008.

Dedication of the Causeway in honor of the late George Mitchell and his late wife Cynthia occurred Tuesday October 25, 2016.