US Bridges

Dumbarton Street over Little Pimmit Run

Fair

Arlington County, Virginia · _ · Structure no. 000000000029953

Built
1989
36 years old
Condition
Fair
inspected February 2024
Type
Culvert
Steel
Length
26 ft
2 main spans
Daily traffic
500
2012 count
Owner
County
County Highway Agency

About this bridge

Dumbarton Street over Little Pimmit Run is a steel culvert carrying Dumbarton Street over Little Pimmit Run in Arlington County, Virginia. It was built in 1989, so it is 36 years old, younger 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 500 vehicles a day, roughly 20% of them trucks, projected to reach 1,000 by 2042. The structure is 26 ft (7.9 m) long and 24 ft wide.

CarriesDumbarton Street
CrossesLittle Pimmit Run
Location_
RouteCity Street 0
Coordinates38.91456, -77.14349
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 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 width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2012)
Projected traffic1,000 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Dumbarton Street over Little Pimmit Run built?

It was built in 1989, making it 36 years old in 2025.

What condition is Dumbarton 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 February 2024.

How much traffic does Dumbarton Street over Little Pimmit Run carry?

About 500 vehicles per day (2012 count), of which roughly 20% are trucks.

How long is Dumbarton Street over Little Pimmit Run?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 24 ft wide.

Who owns Dumbarton Street over Little Pimmit Run?

It is owned by the County Highway Agency.