Lake Bridges Over Kentucky Lake and Lake Barkley Opened to traffic in 2018, the new U.S. 68/KY 80 Bridges replaced two narrow 20-foot-wide 1930's era truss bridges. The main spans over each of the navigable waterways with substantial barge traffic feature a unique, basket-handled tied arch superstructure with steel plate girder approaches.
Homestead Grays Bridge While downtown Pittsburgh is known for iconic long-span steel bridges, there are several impressive and treasured long-span river crossings outside of the downtown area as well, such as the Homestead Grays Bridge--a high-level steel bridge nearly 100 feet above the Monongahela River.
Need a quick estimate for steel bridge superstructure weight? Then look no further than the NSBA's "Steel Span To Weight Curves". They are a great way to compare various span arrangements and girder spacings on the back-of-an-envelope.