EntityQ973120· pop 5· linked from 25 articlesUnion Arch BridgeSign in to savehistoric masonry structure in Maryland, U.S.ConnectionsLuxembourgCountryWashington, D.C.EntityAbraham LincolnPersonMarylandEntitybridgeEntityTheodore RooseveltPersongeographic coordinate systemEntityAmerican Civil WarConceptInternational Standard Book NumberEntityFranklin PierceEntitygraniteEntityUnited States CongressEntitydigital object identifierEntityConfederate States of AmericaEntitytunnelEntitysandstoneEntityChesterEntityJefferson DavisEntityPotomac RiverEntitymasonryEntityCategoriesBridges completed in 1864Bridges in Montgomery County, MarylandCabin John, MarylandHistoric American Buildings Survey in MarylandHistoric American Engineering Record in MarylandHistoric Civil Engineering LandmarksNational Register of Historic Places in Montgomery County, MarylandRoad bridges on the National Register of Historic Places in MarylandStone arch bridges in the United States