US Bridges

N.Dunbarton Street over Little Pimmit Run

Fair

Arlington County, Virginia · 0.10 309 & 0.0 Dead End · Structure no. 000000000000038

Built
1961
64 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
26 ft
2 main spans
Daily traffic
60
1993 count
Owner
County
County Highway Agency

About this bridge

N.Dunbarton Street over Little Pimmit Run is a steel culvert carrying N.Dunbarton Street over Little Pimmit Run in Arlington County, Virginia. It was built in 1961, so it is 64 years old, older than the Virginia average of 50.7 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 60 vehicles a day, roughly 1% of them trucks, projected to reach 100 by 2042. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesN.Dunbarton Street
CrossesLittle Pimmit Run
Location0.10 309 & 0.0 Dead End
RouteCity Street 0
Coordinates38.91357, -77.14281
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (1993)
Projected traffic100 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$71 million
NavigationNo navigation control on waterway

Frequently asked questions

When was N.Dunbarton Street over Little Pimmit Run built?

It was built in 1961, making it 64 years old in 2025.

What condition is N.Dunbarton Street over Little Pimmit Run 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 September 2024.

How much traffic does N.Dunbarton Street over Little Pimmit Run carry?

About 60 vehicles per day (1993 count), of which roughly 1% are trucks.

How long is N.Dunbarton Street over Little Pimmit Run?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns N.Dunbarton Street over Little Pimmit Run?

It is owned by the County Highway Agency.