HENDERSON, Ky. – A contractor for the Kentucky Transportation Cabinet plans to begin a T-1 Steel maintenance project on the southbound U.S. 41 bridge in Henderson on Monday, September 8. T-1 steel — a grade of high-strength, quenched and treated steel known for being highly amenable to welding and machining — is no longer used in bridge construction but was used regularly in the 1950s and 1960s around the country. The southbound bridge, built in 1965, was constructed with the use of T-1 steel. Kentucky Transportation engineers are working with the contractor to develop a work schedule and traffic control plan that will cause the least impact to motorists looking to travel between Indiana and Kentucky. That information will be released to the public as soon as it becomes available, according to a news release.