US Bridges

Adney Gap RD 643 over N Fork Blackwater River

Fair

Franklin County, Virginia · 0.10 Rt 745; 2.00 Rt 602 · Structure no. 000000000007875

Built
1932
93 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
68
2017 count
Owner
State
State Highway Agency

About this bridge

Adney Gap RD 643 over N Fork Blackwater River is a steel stringer/multi-beam or girder carrying Adney Gap RD 643 over N Fork Blackwater River in Franklin County, Virginia. It was built in 1932, 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 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 68 vehicles a day, projected to reach 101 by 2045. The structure is 25 ft (7.6 m) long and 20 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesAdney Gap RD 643
CrossesN Fork Blackwater River
Location0.10 Rt 745; 2.00 Rt 602
RouteCounty Highway 643
CountyFranklin County
StateVirginia
Coordinates37.12183, -80.07562
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68 (2017)
Projected traffic101 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$120 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Adney Gap RD 643 over N Fork Blackwater River built?

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

What condition is Adney Gap RD 643 over N Fork Blackwater 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 April 2023.

How much traffic does Adney Gap RD 643 over N Fork Blackwater River carry?

About 68 vehicles per day (2017 count).

How long is Adney Gap RD 643 over N Fork Blackwater River?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 20 ft wide.

Who owns Adney Gap RD 643 over N Fork Blackwater River?

It is owned by the State Highway Agency.