US Bridges

Md 108 EB over Little Patuxent River

Fair

Howard County, Maryland · 0.55 Mile West of US 29 · Structure no. 100000130016013

Built
1975
50 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
106 ft
1 main span
Daily traffic
36,160
2009 count
Owner
State
State Highway Agency

About this bridge

Md 108 EB over Little Patuxent River is a steel stringer/multi-beam or girder carrying Md 108 EB over Little Patuxent River in Howard County, Maryland. It was built in 1975, so it is 50 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 36,160 vehicles a day, roughly 8% of them trucks, projected to reach 21,787 by 2026. The structure is 106 ft (32.3 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMd 108 EB
CrossesLittle Patuxent River
Location0.55 Mile West of US 29
RouteState Highway 108
Coordinates39.23942, -76.84731
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating66.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span102 ft (31.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,160 (2009)
Projected traffic21,787 by 2026
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 108 EB over Little Patuxent River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Md 108 EB over Little Patuxent 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 April 2024.

How much traffic does Md 108 EB over Little Patuxent River carry?

About 36,160 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 108 EB over Little Patuxent River?

The structure is 106 ft (32.3 m) long with a longest span of 102 ft (31.1 m) and a deck 43 ft wide.

Who owns Md 108 EB over Little Patuxent River?

It is owned by the State Highway Agency.