US Bridges

Md 543 over Deer Creek

Fair

Harford County, Maryland · 1.47 Miles S of Md 440 · Structure no. 100000120049010

Built
1932
93 years old, rebuilt 1985
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
106 ft
1 main span
Daily traffic
7,736
2024 count
Owner
State
State Highway Agency

About this bridge

Md 543 over Deer Creek is a steel stringer/multi-beam or girder carrying Md 543 over Deer Creek in Harford County, Maryland. It was built in 1932 and reconstructed in 1985, so it is 93 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 7,736 vehicles a day, roughly 8% of them trucks, projected to reach 8,923 by 2044. The structure is 106 ft (32.3 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesMd 543
CrossesDeer Creek
Location1.47 Miles S of Md 440
RouteState Highway 543
Coordinates39.61891, -76.33069
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span100 ft (30.5 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,736 (2024)
Projected traffic8,923 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$205,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 543 over Deer Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1985.

What condition is Md 543 over Deer 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 May 2024.

How much traffic does Md 543 over Deer Creek carry?

About 7,736 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Md 543 over Deer Creek?

The structure is 106 ft (32.3 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.

Who owns Md 543 over Deer Creek?

It is owned by the State Highway Agency.