US Bridges

US 40 over Swan Creek

Fair

Harford County, Maryland · 0.26 Mile West of Md 132B · Structure no. 100000120022010

Built
1935
90 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
42 ft
1 main span
Daily traffic
27,800
2009 count
Owner
State
State Highway Agency

About this bridge

US 40 over Swan Creek is a concrete tee beam carrying US 40 over Swan Creek in Harford County, Maryland. It was built in 1935, so it is 90 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 27,800 vehicles a day, roughly 8% of them trucks, projected to reach 33,068 by 2026. The structure is 42 ft (12.8 m) long and 114 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUS 40
CrossesSwan Creek
Location0.26 Mile West of Md 132B
RouteU.S. Route 40
CountyHarford County
StateMaryland
Coordinates39.52263, -76.14234
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width114 ft (34.7 m)
Roadway width110 ft (33.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,800 (2009)
Projected traffic33,068 by 2026
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$316,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 40 over Swan Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is US 40 over Swan Creek 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 January 2025.

How much traffic does US 40 over Swan Creek carry?

About 27,800 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 40 over Swan Creek?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 114 ft wide.

Who owns US 40 over Swan Creek?

It is owned by the State Highway Agency.