This is a list of bridges documented by the Historic American Engineering Record in the U.S. state of Delaware.
Bridges Survey No.Name (as assigned by HAER)StatusTypeBuiltDocumentedCarriesCrossesLocationCountyCoordinatesPennsylvania Railroad Improvements, Swing BridgeExtantSwing span19021977Northeast CorridorBrandywine RiverWilmingtonNew CastlePennsylvania Railroad Improvements, Brick Arch ViaductExtantBrick arch19021977Northeast CorridorCity streetsWilmingtonNew CastleAugustine BridgeReplacedPratt truss18851979Road 49 (Augustine Cutoff)Brandywine RiverWilmingtonNew CastleRehoboth Avenue BridgeReplacedRolling lift (Scherzer) bascule19261984Lewes and Rehoboth CanalRehoboth BeachSussexThompson's BridgeReplacedSteel built-up girder (concrete-encased)19351990Brandywine RiverWilmingtonNew CastleHeald Street BridgeRehabilitatedReinforced concrete flat slab19421990Former Pennsylvania Railroad Shellpot BranchWilmingtonNew CastleOdessa BridgeReplacedCenter-bearing swing span19281997Appoquinimink RiverOdessaNew CastleWagamon Pond Dam and BridgeReplacedReinforced concrete cast-in-place slab19171990Road 197 (Mulberry Street)Broadkill RiverMiltonSussexRed BridgeReplacedSteel girder (concrete-encased)19161991Broadkill RiverMiltonSussexSouth Wilmington Causeway BridgeReplacedReinforced concrete flat slab19401991Former Pennsylvania Railroad Shellpot BranchWilmingtonNew CastleSeaford BridgeRehabilitatedSimple trunnion bascule19251991Road 13 (North Front Street)Nanticoke RiverSeafordSussexState Highway Bridge No. 20RehabilitatedSteel girder (concrete-encased)19321992Road 232 (Rockland Road)Husbands RunRocklandNew CastleState Highway Bridge No. 2RehabilitatedSteel girder (concrete-encased)19331992Road 232 (Rockland Road)Brandywine RiverRocklandNew CastleRailroad Avenue BridgeReplacedSteel rolled stringer (concrete-encased)19031992Church AvenueMispillion RiverMilfordKentThompson's Station BridgeRehabilitatedWarren truss19281993Road 329 (Chambers Rock Road)White Clay CreekNewarkNew CastleMill Creek BridgeReplacedTimber-concrete composite19361994Mill CreekSmyrnaKentDelaware State Bridge No. 21ARehabilitatedRolling lift (Scherzer) bascule19301995Mispillion RiverMilfordKentDelaware Bridge No. 179AReplacedWarren truss19001995Road 285 (Evanson Road)Mill CreekHockessinNew CastleState Bridge No. 424ReplacedWarren truss18841996Road 446 (Wiggins Mill Road)Wiggins Mill Pond OutletTownsendNew CastleState Bridge No. 177RehabilitatedStone arch18461996Brackenville RoadMill CreekHockessinNew CastleState Bridge No. 123AReplacedTimber stringer19331996Road 123 (Stratham Lane)Kings Causeway BranchMilfordKentState Bridge No. 456ReplacedTimber stringer19341996Road 45 (Walker School Road)Sawmill Branch of Smyrna RiverTownsendNew CastleCarter's BridgeRehabilitatedSteel rolled stringer19091996Road 211 (Still Road)Choptank RiverSandtownKent
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