US Bridges

Carlin Springs RD over Four Mile Run

Fair

Arlington County, Virginia · 0005/50 0115/120 · Structure no. 000000000000015

Built
1987
38 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
75 ft
1 main span
Daily traffic
14,742
2022 count
Owner
County
County Highway Agency

About this bridge

Carlin Springs RD over Four Mile Run is a steel stringer/multi-beam or girder carrying Carlin Springs RD over Four Mile Run in Arlington County, Virginia. It was built in 1987, so it is 38 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 14,742 vehicles a day, roughly 1% of them trucks, projected to reach 17,041 by 2042. The structure is 75 ft (22.9 m) long and 81 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCarlin Springs RD
CrossesFour Mile Run
Location0005/50 0115/120
RouteCounty Highway 0
CountyArlington County
StateVirginia
Coordinates38.86771, -77.12779
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.8 US tons
Inventory rating68.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span73 ft (22.3 m)
Deck width81 ft (24.7 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,742 (2022)
Projected traffic17,041 by 2042
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Carlin Springs RD over Four Mile Run built?

It was built in 1987, making it 38 years old in 2025.

What condition is Carlin Springs RD over Four Mile 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 March 2024.

How much traffic does Carlin Springs RD over Four Mile Run carry?

About 14,742 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Carlin Springs RD over Four Mile Run?

The structure is 75 ft (22.9 m) long with a longest span of 73 ft (22.3 m) and a deck 81 ft wide.

Who owns Carlin Springs RD over Four Mile Run?

It is owned by the County Highway Agency.