US Bridges

Cia Entrance Ramp over Gwmp

Fair

Fairfax County, Virginia · 2.2 Miles South of I-495. · Structure no. 3300003P0000000

Built
1959
66 years old, rebuilt 1984
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
167 ft
3 main spans
Daily traffic
900
2013 count
Owner
State
State Highway Agency

About this bridge

Cia Entrance Ramp over Gwmp is a prestressed concrete stringer/multi-beam or girder carrying Cia Entrance Ramp over Gwmp in Fairfax County, Virginia. It was built in 1959 and reconstructed in 1984, 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 900 vehicles a day, roughly 9% of them trucks, projected to reach 990 by 2033. The structure is 167 ft (51 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesCia Entrance Ramp
CrossesGwmp
Location2.2 Miles South of I-495.
RouteFederal Lands Road 1
CountyFairfax County
StateVirginia
Coordinates38.95836, -77.1435
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length167 ft (51 m)
Longest span112 ft (34.1 m)
Deck width62 ft (19 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2013)
Projected traffic990 by 2033
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
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$128,000 (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cia Entrance Ramp over Gwmp built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1984.

What condition is Cia Entrance Ramp over Gwmp 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 Cia Entrance Ramp over Gwmp carry?

About 900 vehicles per day (2013 count), of which roughly 9% are trucks.

How long is Cia Entrance Ramp over Gwmp?

The structure is 167 ft (51 m) long with a longest span of 112 ft (34.1 m) and a deck 62 ft wide.

Who owns Cia Entrance Ramp over Gwmp?

It is owned by the State Highway Agency and maintained by the National Park Service.