US Bridges

Conover Ln. over M Fork Holston River

FairPosted for load

Smyth County, Virginia · .12 to R11 &.12TO Deadend · Structure no. 000000000017679

Built
1932
93 years old, rebuilt 2000
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
25
2017 count
Owner
State
State Highway Agency

About this bridge

Conover Ln. over M Fork Holston River is a steel stringer/multi-beam or girder carrying Conover Ln. over M Fork Holston River in Smyth County, Virginia. It was built in 1932 and reconstructed in 2000, 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 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. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, projected to reach 28 by 2045. The structure is 31 ft (9.4 m) long and 16 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

Location

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CarriesConover Ln.
CrossesM Fork Holston River
Location.12 to R11 &.12TO Deadend
RouteCounty Highway 684
CountySmyth County
StateVirginia
Coordinates36.88137, -81.38257
Functional classRural Local

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.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating20 US tons
Inventory rating12 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 10
Structure length31 ft (9.4 m)
Longest span29 ft (8.7 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2017)
Projected traffic28 by 2045
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed198.8 mi (320 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$109.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Conover Ln. over M Fork Holston River built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2000.

What condition is Conover Ln. over M Fork Holston River 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 March 2025.

How much traffic does Conover Ln. over M Fork Holston River carry?

About 25 vehicles per day (2017 count).

How long is Conover Ln. over M Fork Holston River?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.7 m) and a deck 16 ft wide.

Who owns Conover Ln. over M Fork Holston River?

It is owned by the State Highway Agency.