US Bridges

Hunter Mill Road over Colvin Run

Good

Fairfax County, Virginia · 00.80FR606 00.40TO6942 · Structure no. 000000000030875

Built
2022
3 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
7,912
2022 count
Owner
State
State Highway Agency

About this bridge

Hunter Mill Road over Colvin Run is a prestressed concrete box beam or girders - multiple carrying Hunter Mill Road over Colvin Run in Fairfax County, Virginia. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,912 vehicles a day, roughly 1% of them trucks, projected to reach 8,009 by 2045. The structure is 40 ft (12.2 m) long and 34 ft wide.

Location

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CarriesHunter Mill Road
CrossesColvin Run
Location00.80FR606 00.40TO6942
RouteCounty Highway 674
CountyFairfax County
StateVirginia
Coordinates38.9652, -77.30938
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating81 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length40 ft (12.2 m)
Longest span36 ft (11 m)
Deck width34 ft (10.4 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic7,912 (2022)
Projected traffic8,009 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hunter Mill Road over Colvin Run built?

It was built in 2022, making it 3 years old in 2025.

What condition is Hunter Mill Road over Colvin 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 July 2023.

How much traffic does Hunter Mill Road over Colvin Run carry?

About 7,912 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Hunter Mill Road over Colvin Run?

The structure is 40 ft (12.2 m) long with a longest span of 36 ft (11 m) and a deck 34 ft wide.

Who owns Hunter Mill Road over Colvin Run?

It is owned by the State Highway Agency.