US Bridges

Is 83 Nbr over Timonium Road

Fair

Baltimore County, Maryland · 1.005 MI N of Md 131 · Structure no. 100000030064011

Built
1954
71 years old, rebuilt 2003
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
133 ft
3 main spans
Daily traffic
137,301
2009 count
Owner
State
State Highway Agency

About this bridge

Is 83 Nbr over Timonium Road is a steel continuous stringer/multi-beam or girder carrying Is 83 Nbr over Timonium Road in Baltimore County, Maryland. It was built in 1954 and reconstructed in 2003, so it is 71 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 6 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 137,301 vehicles a day, roughly 8% of them trucks, projected to reach 66,788 by 2026. The structure is 133 ft (40.5 m) long and 78 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

No coordinates are recorded for this structure.

CarriesIs 83 Nbr
CrossesTimonium Road
Location1.005 MI N of Md 131
RouteInterstate 83
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating75 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span49 ft (14.9 m)
Deck width78 ft (23.7 m)
Roadway width73 ft (22.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137,301 (2009)
Projected traffic66,788 by 2026
Trucks8%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 83 Nbr over Timonium Road built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2003.

What condition is Is 83 Nbr over Timonium Road 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 March 2024.

How much traffic does Is 83 Nbr over Timonium Road carry?

About 137,301 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Is 83 Nbr over Timonium Road?

The structure is 133 ft (40.5 m) long with a longest span of 49 ft (14.9 m) and a deck 78 ft wide.

Who owns Is 83 Nbr over Timonium Road?

It is owned by the State Highway Agency.