US Bridges

Dunloggin Road over Plumtree Branch

Fair

Howard County, Maryland · 0.5 MI W of ST Johns Lane · Structure no. 200000HO0080010

Built
1965
60 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
1,621
93 count
Owner
County
County Highway Agency

About this bridge

Dunloggin Road over Plumtree Branch is a prestressed concrete box beam or girders - multiple carrying Dunloggin Road over Plumtree Branch in Howard County, Maryland. It was built in 1965, so it is 60 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 1,621 vehicles a day, roughly 4% of them trucks, projected to reach 1,621 by 15. The structure is 59 ft (18.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesDunloggin Road
CrossesPlumtree Branch
Location0.5 MI W of ST Johns Lane
RouteCounty Highway 281
CountyHoward County
StateMaryland
Coordinates39.26301, -76.83747
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating50.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length59 ft (18.1 m)
Longest span57 ft (17.4 m)
Deck width44 ft (13.5 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,621 (93)
Projected traffic1,621 by 15
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Dunloggin Road over Plumtree Branch built?

It was built in 1965, making it 60 years old in 2025.

What condition is Dunloggin Road over Plumtree Branch 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 2023.

How much traffic does Dunloggin Road over Plumtree Branch carry?

About 1,621 vehicles per day (93 count), of which roughly 4% are trucks.

How long is Dunloggin Road over Plumtree Branch?

The structure is 59 ft (18.1 m) long with a longest span of 57 ft (17.4 m) and a deck 44 ft wide.

Who owns Dunloggin Road over Plumtree Branch?

It is owned by the County Highway Agency.