US Bridges

Dunbar Road over Potcamp Fork

Fair

Wise County, Virginia · 4.4MTO23B&2.61MTOENDRTE · Structure no. 000000000019357

Built
1980
45 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
167
2022 count
Owner
State
State Highway Agency

About this bridge

Dunbar Road over Potcamp Fork is a prestressed concrete box beam or girders - multiple carrying Dunbar Road over Potcamp Fork in Wise County, Virginia. It was built in 1980, so it is 45 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 5 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 251 by 2042. The structure is 52 ft (15.8 m) long and 30 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

Location

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CarriesDunbar Road
CrossesPotcamp Fork
Location4.4MTO23B&2.61MTOENDRTE
RouteCounty Highway 603
CountyWise County
StateVirginia
Coordinates36.96844, -82.73408
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
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.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating94 US tons
Inventory rating73 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length52 ft (15.8 m)
Longest span48 ft (14.6 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic167 (2022)
Projected traffic251 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 Potcamp Fork built?

It was built in 1980, making it 45 years old in 2025.

What condition is Dunbar Road over Potcamp 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 March 2024.

How much traffic does Dunbar Road over Potcamp Fork carry?

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

How long is Dunbar Road over Potcamp Fork?

The structure is 52 ft (15.8 m) long with a longest span of 48 ft (14.6 m) and a deck 30 ft wide.

Who owns Dunbar Road over Potcamp Fork?

It is owned by the State Highway Agency.