US Bridges

Gwmp over Boundry Channel

Fair

Fairfax County, Virginia · 1.5 Miles South of I-95/4 · Structure no. 3300049P0000000

Built
1960
65 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
22,400
2023 count
Owner
Federal
National Park Service

About this bridge

Gwmp over Boundry Channel is a concrete culvert carrying Gwmp over Boundry Channel in Fairfax County, Virginia. It was built in 1960, so it is 65 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 22,400 vehicles a day, roughly 1% of them trucks, projected to reach 24,640 by 2043. The structure is 22 ft (6.6 m) long and 69 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGwmp
CrossesBoundry Channel
Location1.5 Miles South of I-95/4
RouteFederal Lands Road 3
CountyFairfax County
StateVirginia
Coordinates38.76861, -77.05364
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.6 m)
Longest span10 ft (3.2 m)
Deck width69 ft (21.1 m)
Roadway width66 ft (20 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,400 (2023)
Projected traffic24,640 by 2043
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$83,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gwmp over Boundry Channel built?

It was built in 1960, making it 65 years old in 2025.

What condition is Gwmp over Boundry Channel 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 over Boundry Channel carry?

About 22,400 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Gwmp over Boundry Channel?

The structure is 22 ft (6.6 m) long with a longest span of 10 ft (3.2 m) and a deck 69 ft wide.

Who owns Gwmp over Boundry Channel?

It is owned by the National Park Service.