US Bridges

Thomas Bridge Rd. over S Fork Holston River

FairPosted for load

Smyth County, Virginia · 0.01FR650;0.39TO656 · Structure no. 000000000017646

Built
1962
63 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
106 ft
2 main spans
Daily traffic
2,554
2022 count
Owner
State
State Highway Agency

About this bridge

Thomas Bridge Rd. over S Fork Holston River is a prestressed concrete box beam or girders - multiple carrying Thomas Bridge Rd. over S Fork Holston River in Smyth County, Virginia. It was built in 1962, so it is 63 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 2,554 vehicles a day, projected to reach 2,848 by 2042. The structure is 106 ft (32.3 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesThomas Bridge Rd.
CrossesS Fork Holston River
Location0.01FR650;0.39TO656
RouteCounty Highway 657
Coordinates36.76844, -81.56669
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30 US tons
Inventory rating19 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 15
Structure length106 ft (32.3 m)
Longest span53 ft (16.2 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,554 (2022)
Projected traffic2,848 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$328.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Thomas Bridge Rd. over S Fork Holston River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Thomas Bridge Rd. over S 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 October 2024.

How much traffic does Thomas Bridge Rd. over S Fork Holston River carry?

About 2,554 vehicles per day (2022 count).

How long is Thomas Bridge Rd. over S Fork Holston River?

The structure is 106 ft (32.3 m) long with a longest span of 53 ft (16.2 m) and a deck 29 ft wide.

Who owns Thomas Bridge Rd. over S Fork Holston River?

It is owned by the State Highway Agency.