<Li> Huey P. Long Bridge--A truss cantilever bridge carrying US 190 (Airline Highway) and one rail line between East Baton Rouge and West Baton Rouge Parishes in Louisiana . </Li> <Li> Horace Wilkinson Bridge--A cantilevered through truss bridge, carrying six lanes of Interstate 10 between Baton Rouge and Port Allen in Louisiana . It is the highest bridge over the Mississippi River . </Li> <Li> Hale Boggs Memorial Bridge </Li> <Li> Huey P. Long Bridge--In Jefferson Parish, Louisiana, the first Mississippi River span built in Louisiana . </Li>

What river drains the great plains region of the us