US Bridges

Flat Ridge Rd. over Big Fox Creek

Fair

Grayson County, Virginia · 1.0 M Fr. R731-0.3 M R739 · Structure no. 000000000008840

Built
1981
44 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
140 ft
3 main spans
Daily traffic
171
2022 count
Owner
State
State Highway Agency

About this bridge

Flat Ridge Rd. over Big Fox Creek is a concrete slab carrying Flat Ridge Rd. over Big Fox Creek in Grayson County, Virginia. It was built in 1981, so it is 44 years old, younger 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 5 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 171 vehicles a day, roughly 1% of them trucks, projected to reach 191 by 2045. The structure is 140 ft (42.7 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesFlat Ridge Rd.
CrossesBig Fox Creek
Location1.0 M Fr. R731-0.3 M R739
RouteCounty Highway 658
CountyGrayson County
StateVirginia
Coordinates36.66824, -81.39189
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating81 US tons
Inventory rating61.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span59 ft (18 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic171 (2022)
Projected traffic191 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Flat Ridge Rd. over Big Fox Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Flat Ridge Rd. over Big Fox Creek 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 October 2024.

How much traffic does Flat Ridge Rd. over Big Fox Creek carry?

About 171 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Flat Ridge Rd. over Big Fox Creek?

The structure is 140 ft (42.7 m) long with a longest span of 59 ft (18 m) and a deck 32 ft wide.

Who owns Flat Ridge Rd. over Big Fox Creek?

It is owned by the State Highway Agency.