US Bridges

Lyons Gap Ave. over Carlock Creek

FairPosted for load

Smyth County, Virginia · .5 to R637 & .05 to R731 · Structure no. 000000000017720

Built
1930
95 years old, rebuilt 1981
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
1,831
2022 count
Owner
State
State Highway Agency

About this bridge

Lyons Gap Ave. over Carlock Creek is a concrete slab carrying Lyons Gap Ave. over Carlock Creek in Smyth County, Virginia. It was built in 1930 and reconstructed in 1981, so it is 95 years old, older 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 1,831 vehicles a day, roughly 1% of them trucks, projected to reach 2,042 by 2042. The structure is 24 ft (7.3 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesLyons Gap Ave.
CrossesCarlock Creek
Location.5 to R637 & .05 to R731
RouteCounty Highway 774
CountySmyth County
StateVirginia
Coordinates36.80897, -81.6739
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment7: Better than present minimum criteria
Operating rating34 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span21 ft (6.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,831 (2022)
Projected traffic2,042 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Lyons Gap Ave. over Carlock Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1981.

What condition is Lyons Gap Ave. over Carlock 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 November 2024.

How much traffic does Lyons Gap Ave. over Carlock Creek carry?

About 1,831 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Lyons Gap Ave. over Carlock Creek?

The structure is 24 ft (7.3 m) long with a longest span of 21 ft (6.4 m) and a deck 31 ft wide.

Who owns Lyons Gap Ave. over Carlock Creek?

It is owned by the State Highway Agency.