This is a list of bridges and tunnels on the National Register of Historic Places in the U.S. state of Maryland.
NameImageBuiltListedLocationCountyTypeB & O Railroad Potomac River Crossing1894, 1931Harpers Ferry, West VirginiaWashingtonB & O BridgeKeedysvilleWashingtonBennies Hill Road BridgeMiddletownFrederickBowstring arch trussBloomington Viaduct1851, 1916BloomingtonGarrettMultispan masonry bridgeBollman Suspension and Trussed Bridge1869SavageHowardBollman TrussBullfrog Road Bridge1908TaneytownCarrollParker trussCarrollton Viaduct1828, 1829BaltimoreBaltimore CityCasselman's Bridge, National Road1813GrantsvilleGarrettSingle archCrum Road BridgeWalkersvilleFrederickBowstring arch trussFourpoints BridgeEmmitsburgFrederickPratt trussGilpin's Falls Covered Bridgeca. 1855North EastCecilBurr Arch Through TrussGuilford Quarry Pratt Through Truss Bridge1902GuilfordHowardHoward Street Tunnel1890, 1895BaltimoreBaltimore CityBrick-lined tunnel with iron-arched centeringsJericho Covered Bridge1865, 1937Jerusalem, KingsvilleBaltimore, HarfordBurr Arch Through TrussLeGore Bridge1898-1900WoodsboroFrederickFive-span stone archLombard Street Bridge1877, 1974BaltimoreBaltimore CityWater-main trussLoys Station Covered BridgeThurmontFrederickCovered Multiple king postMD 214 over Patuxent River Bridge1935DavidsonvilleAnne ArundelParker through trussOld Mill Road Bridge1882Rocky RidgeFrederickPratt trussPatterson Viaduct Ruins1829Catonsville, IlchesterBaltimore, HowardMasonry Arch BridgePocomoke River Bridge1920Pocomoke CityWorcesterBasculePoffenberger Road Bridge1878MiddletownFrederickPratt or Whipple thru trussRoddy Road Covered BridgeThurmontFrederickCovered Single king postSnow Hill Drawbridge1932Snow HillWorcesterBasculeSykesville Bypass Bridge1963SykesvilleHowardAluminum box girderThomas Viaduct, Baltimore & Ohio Railroad1835RelayBaltimore, HowardMultiple stone archUnion Arch Bridge (Cabin John Aqueduct)1864Cabin JohnMongtomeryMasonry archUtica Covered BridgeThurmontFrederickCovered Burr arch trussWaverly Street Bridge1892WesternportAlleganybowstring arch trussWicomico River Bridge1927SalisburyWicomicoBasculeWilson's Bridge1819HagerstownWashington
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