US Bridges

Route 643 over Mud Fork

Fair

Tazewell County, Virginia · 2.10 RT.702 .20 Rt 656 · Structure no. 000000000025591

Built
1999
26 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
62
2015 count
Owner
State
State Highway Agency

About this bridge

Route 643 over Mud Fork is a concrete slab carrying Route 643 over Mud Fork in Tazewell County, Virginia. It was built in 1999, so it is 26 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 6 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 62 vehicles a day, projected to reach 71 by 2045. The structure is 32 ft (9.8 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRoute 643
CrossesMud Fork
Location2.10 RT.702 .20 Rt 656
RouteCounty Highway 643
CountyTazewell County
StateVirginia
Coordinates37.239, -81.39994
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating98 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length32 ft (9.8 m)
Longest span30 ft (9.2 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2015)
Projected traffic71 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Route 643 over Mud Fork built?

It was built in 1999, making it 26 years old in 2025.

What condition is Route 643 over Mud Fork 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 April 2023.

How much traffic does Route 643 over Mud Fork carry?

About 62 vehicles per day (2015 count).

How long is Route 643 over Mud Fork?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.2 m) and a deck 29 ft wide.

Who owns Route 643 over Mud Fork?

It is owned by the State Highway Agency.