US Bridges

Dunbar Road over Roaring Fork River

Fair

Wise County, Virginia · 1.75MTO23B&5.26MTOENDRTE · Structure no. 000000000019355

Built
1978
47 years old, rebuilt 1988
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
167
2022 count
Owner
State
State Highway Agency

About this bridge

Dunbar Road over Roaring Fork River is a prestressed concrete box beam or girders - multiple carrying Dunbar Road over Roaring Fork River in Wise County, Virginia. It was built in 1978 and reconstructed in 1988, so it is 47 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 167 vehicles a day, roughly 3% of them trucks, projected to reach 186 by 2042. The structure is 50 ft (15.2 m) long and 36 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

CarriesDunbar Road
CrossesRoaring Fork River
Location1.75MTO23B&5.26MTOENDRTE
RouteCounty Highway 603
Coordinates36.94501, -82.72033
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating88 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width36 ft (11 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic167 (2022)
Projected traffic186 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dunbar Road over Roaring Fork River built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 1988.

What condition is Dunbar Road over Roaring Fork 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 Dunbar Road over Roaring Fork River carry?

About 167 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Dunbar Road over Roaring Fork River?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 36 ft wide.

Who owns Dunbar Road over Roaring Fork River?

It is owned by the State Highway Agency.