US Bridges

Md 108 EB over US 29

Fair

Howard County, Maryland · 0.36 Mile West of Md 108H · Structure no. 100000130111013

Built
1986
39 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
277 ft
2 main spans
Daily traffic
19,880
2009 count
Owner
State
State Highway Agency

About this bridge

Md 108 EB over US 29 is a steel continuous stringer/multi-beam or girder carrying Md 108 EB over US 29 in Howard County, Maryland. It was built in 1986, so it is 39 years old, younger 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 19,880 vehicles a day, roughly 8% of them trucks, projected to reach 10,430 by 2026. The structure is 277 ft (84.4 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMd 108 EB
CrossesUS 29
Location0.36 Mile West of Md 108H
RouteState Highway 108
Coordinates39.23986, -76.83766
Functional classUrban Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
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 rating91.5 US tons
Inventory rating54.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length277 ft (84.4 m)
Longest span136 ft (41.5 m)
Deck width53 ft (16.2 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,880 (2009)
Projected traffic10,430 by 2026
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Md 108 EB over US 29 built?

It was built in 1986, making it 39 years old in 2025.

What condition is Md 108 EB over US 29 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 Md 108 EB over US 29 carry?

About 19,880 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 108 EB over US 29?

The structure is 277 ft (84.4 m) long with a longest span of 136 ft (41.5 m) and a deck 53 ft wide.

Who owns Md 108 EB over US 29?

It is owned by the State Highway Agency.