National Geographic : 1944 Jan
The National Geographic Magazine F.S.Lincoln At New Orleans U.S.90 Crosses the Mississippi onthe Amazing Huey P.Long Bridge This steel cantilever structure extends from levee tolevee. Itsdeepest caisson rests 170feet below sealevel. Carrying railway, footpath, and motor highway traffic, thebridge, including itsapproaches, is4.4miles long. Height of the central pier,from toptobase, is409feet, orequal tothat ofa36-story building.