US Bridges

Gwmp (sb) over Spout Run & Spout Run Pa

Fair

Arlington County, Virginia · 7.8 Miles South of I-495. · Structure no. 3300010P0000000

Built
1959
66 years old, rebuilt 1991
Condition
Fair
inspected April 2023
Type
Arch - Deck
Concrete
Length
335 ft
1 main span
Daily traffic
27,400
2019 count
Owner
Federal
National Park Service

About this bridge

Gwmp (sb) over Spout Run & Spout Run Pa is a concrete arch - deck carrying Gwmp (sb) over Spout Run & Spout Run Pa in Arlington County, Virginia. It was built in 1959 and reconstructed in 1991, so it is 66 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 27,400 vehicles a day, roughly 1% of them trucks, projected to reach 30,140 by 2039. The structure is 335 ft (102 m) long and 38 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesGwmp (sb)
CrossesSpout Run & Spout Run Pa
Location7.8 Miles South of I-495.
RouteFederal Lands Road 1
CountyArlington County
StateVirginia
Coordinates38.9015, -77.08267
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 20
Structure length335 ft (102 m)
Longest span230 ft (70.1 m)
Deck width38 ft (11.6 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,400 (2019)
Projected traffic30,140 by 2039
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
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 Gwmp (sb) over Spout Run & Spout Run Pa built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1991.

What condition is Gwmp (sb) over Spout Run & Spout Run Pa 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 Gwmp (sb) over Spout Run & Spout Run Pa carry?

About 27,400 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Gwmp (sb) over Spout Run & Spout Run Pa?

The structure is 335 ft (102 m) long with a longest span of 230 ft (70.1 m) and a deck 38 ft wide.

Who owns Gwmp (sb) over Spout Run & Spout Run Pa?

It is owned by the National Park Service.