US Bridges

Old Mill Road over North Fork Dogue Creek

Good

Fairfax County, Virginia · 00.50FR624/00.35TO235 · Structure no. 000000000025725

Built
2000
25 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
87 ft
3 main spans
Daily traffic
2,529
2022 count
Owner
State
State Highway Agency

About this bridge

Old Mill Road over North Fork Dogue Creek is a prestressed concrete slab carrying Old Mill Road over North Fork Dogue Creek in Fairfax County, Virginia. It was built in 2000, so it is 25 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 2,529 vehicles a day, roughly 1% of them trucks, projected to reach 2,820 by 2042. The structure is 87 ft (26.5 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesOld Mill Road
CrossesNorth Fork Dogue Creek
Location00.50FR624/00.35TO235
RouteCounty Highway 624
Coordinates38.71596, -77.10847
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating72 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span29 ft (8.8 m)
Deck width40 ft (12.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,529 (2022)
Projected traffic2,820 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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$150 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Mill Road over North Fork Dogue Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Old Mill Road over North Fork Dogue Creek 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 July 2024.

How much traffic does Old Mill Road over North Fork Dogue Creek carry?

About 2,529 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Old Mill Road over North Fork Dogue Creek?

The structure is 87 ft (26.5 m) long with a longest span of 29 ft (8.8 m) and a deck 40 ft wide.

Who owns Old Mill Road over North Fork Dogue Creek?

It is owned by the State Highway Agency.