Howard County

NameLocationStatusDesignYear BuiltYear LostSpan Length (ft.)Total Length (ft.)
B&O - Hammond Branch BridgeRailroad over Hammond BranchDerelict/abandonedDeck plate girder--------
B&O - Patterson Bollman BridgeFormer Baltimore & Ohio Railroad over Patapsco RiverReplaced by a new bridgeBollman through truss18691903----
B&O - Patterson ViaductBaltimore & Ohio Railroad over Patapsco RiverDerelict/abandonedStone arch1829186855.0360.0
B&O - Wilkins-Rogers Flour Mill BridgeB&O Railroad over Patapsco RiverIntact but closed to all trafficPratt through truss--------
Bollman BridgeBridge over Little Patuxent RiverOpen to pedestriansBollman through truss1869----160.0
Bonnie Branch BridgeDriveway over Bonnie BranchOpen to trafficLane pony truss--------
BTCO - Patapsco River BridgeStreetcar line (Baltimore Traction/Baltimore Transit) over Patapsco RiverRemoved but not replacedThrough truss--1955?----
CSX - Ellicott City BridgeCSX Railroad over Main StreetOpen to trafficPony/through plate girder1931------
CSX - Patapsco River BridgeCSX (formerly B&O Railroad Old Main Line) over Patapsco River, Ilchester RoadOpen to trafficPratt through truss1902--155.0273.0
CSX - Thomas ViaductB&O Railroad over Patapsco RiverOpen to trafficStone arch1835----612.0
CSX - Twin Arch Road OverpassB&O RR over Twin Arch Road and South Branch Patapsco RiverOpen to trafficStone arch--------
CSX - Union Dam TunnelRailroad (CSX) under US 40Open to trafficTunnel--------
Deep Run BridgeUS 1 over Deep RunOpen to trafficDeck arch1929--22.025.9
Ellicott City Covered BridgeMain Street over Patapsco RiverDestroyed by fireBurr arch-truss18681914--200.0
Folly Quarter Road BridgeFolly Quarter Road over Middle Patuxent RiverOpen to trafficDeck arch1922--60.064.0
Frederick Road BridgeFrederick Road over Little Patuxent RiverOpen to trafficDeck arch1930--25.929.9
Little Patuxent River BridgeSouthbound US 1 over Little Patuxent RiverOpen to trafficDeck arch1900--98.199.1
Old Columbia Road BridgeOld Columbia Road over Middle Patuxent RiverOpen to trafficDeck arch1920--44.948.9
Orange Grove Swinging BridgeFootpath over Patapsco RiverOpen to pedestrians onlyWire suspension--------
Patapsco River BridgeUS 1 over Patapsco RiverOpen to trafficDeck arch1915--100.1272.0
Patapsco River BridgeHollifield Road over Patapsco RiverOpen to trafficParker through truss1934--160.1164.1
Patterson Viaduct Pedestrian BridgePedestrian pathway over Patapsco RiverOpen to pedestrians onlyCable-stayed2006--164.0--
Patuxent River Bridge near Scaggsville MDColumbia Turnpike over Patuxent RiverDemolishedPratt through truss18831954?82.2166.5
Pratt Bridgeformerly the Patuxent Branch of the Baltimore and Ohio Railroad, currently carries the Patuxent Branch Trail over Little Patuxent RiverOpen to pedestriansPratt through truss1902----83.0
US40 Patapsco River BridgeUS 40 over Patapsco RiverOpen to trafficDeck arch1936--180.1334.0