US Bridges

Fairfax Co. Pkwy. over Trib. Big Rocky Run

Good

Fairfax County, Virginia · 00.50FR7700/00.43TO50 · Structure no. 000000000007087

Built
1986
39 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
58,262
2022 count
Owner
State
State Highway Agency

About this bridge

Fairfax Co. Pkwy. over Trib. Big Rocky Run is a concrete culvert carrying Fairfax Co. Pkwy. over Trib. Big Rocky Run in Fairfax County, Virginia. It was built in 1986, so it is 39 years old, younger than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 58,262 vehicles a day, projected to reach 77,057 by 2045. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesFairfax Co. Pkwy.
CrossesTrib. Big Rocky Run
Location00.50FR7700/00.43TO50
RouteState Highway 286
CountyFairfax County
StateVirginia
Coordinates38.86949, -77.38307
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating75 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,262 (2022)
Projected traffic77,057 by 2045
Trucks0%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$125 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Fairfax Co. Pkwy. over Trib. Big Rocky Run built?

It was built in 1986, making it 39 years old in 2025.

What condition is Fairfax Co. Pkwy. over Trib. Big Rocky Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does Fairfax Co. Pkwy. over Trib. Big Rocky Run carry?

About 58,262 vehicles per day (2022 count).

How long is Fairfax Co. Pkwy. over Trib. Big Rocky Run?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Fairfax Co. Pkwy. over Trib. Big Rocky Run?

It is owned by the State Highway Agency.