US Bridges

Big Hill Road over Colliers Creek

Good

Rockbridge County, Virginia · 0.1 to 650N & 0.6 to 650S · Structure no. 000000000015545

Built
1932
93 years old, rebuilt 2003
Condition
Good
inspected December 2023
Type
Slab
Concrete
Length
31 ft
1 main span
Daily traffic
154
2022 count
Owner
State
State Highway Agency

About this bridge

Big Hill Road over Colliers Creek is a concrete slab carrying Big Hill Road over Colliers Creek in Rockbridge County, Virginia. It was built in 1932 and reconstructed in 2003, so it is 93 years old, older 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 154 vehicles a day, roughly 1% of them trucks, projected to reach 172 by 2042. The structure is 31 ft (9.4 m) long and 25 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesBig Hill Road
CrossesColliers Creek
Location0.1 to 650N & 0.6 to 650S
RouteCounty Highway 646
Coordinates37.82139, -79.59827
Functional classRural Minor 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 protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating77.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20 + Mod
Structure length31 ft (9.4 m)
Longest span28 ft (8.4 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic154 (2022)
Projected traffic172 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Big Hill Road over Colliers Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2003.

What condition is Big Hill Road over Colliers 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 December 2023.

How much traffic does Big Hill Road over Colliers Creek carry?

About 154 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Big Hill Road over Colliers Creek?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.4 m) and a deck 25 ft wide.

Who owns Big Hill Road over Colliers Creek?

It is owned by the State Highway Agency.