US Bridges

US 1 over Susquehanna River

Fair

Harford County, Maryland · On Cecil CO Line · Structure no. 100000120001010

Built
1927
98 years old, rebuilt 1984
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
4,488 ft
132 main spans
Daily traffic
14,243
2022 count
Owner
State
State Highway Agency

About this bridge

US 1 over Susquehanna River is a concrete box beam or girders - multiple carrying US 1 over Susquehanna River in Harford County, Maryland. It was built in 1927 and reconstructed in 1984, so it is 98 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 14,243 vehicles a day, roughly 7% of them trucks, projected to reach 17,910 by 2044. The structure is 4,488 ft (1,367.9 m) long and 24 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

No coordinates are recorded for this structure.

CarriesUS 1
CrossesSusquehanna River
LocationOn Cecil CO Line
RouteU.S. Route 1
CountyHarford County
StateMaryland
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating28.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans132
Design loadHS 20
Structure length4,488 ft (1,367.9 m)
Longest span45 ft (13.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,243 (2022)
Projected traffic17,910 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 1 over Susquehanna River built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1984.

What condition is US 1 over Susquehanna River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does US 1 over Susquehanna River carry?

About 14,243 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is US 1 over Susquehanna River?

The structure is 4,488 ft (1,367.9 m) long with a longest span of 45 ft (13.7 m) and a deck 24 ft wide.

Who owns US 1 over Susquehanna River?

It is owned by the State Highway Agency.