US Bridges

Mill Gap RD over Jackson River

Fair

Highland County, Virginia · 1.41 Rt 640 - 0.41 Rt 637 · Structure no. 000000000010211

Built
1931
94 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete
Length
65 ft
2 main spans
Daily traffic
510
2022 count
Owner
State
State Highway Agency

About this bridge

Mill Gap RD over Jackson River is a concrete tee beam carrying Mill Gap RD over Jackson River in Highland County, Virginia. It was built in 1931, so it is 94 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.

It carries about 510 vehicles a day, roughly 2% of them trucks, projected to reach 569 by 2042. The structure is 65 ft (19.8 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMill Gap RD
CrossesJackson River
Location1.41 Rt 640 - 0.41 Rt 637
RouteState Highway 84
CountyHighland County
StateVirginia
Coordinates38.37693, -79.64046
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length65 ft (19.8 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2022)
Projected traffic569 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Mill Gap RD over Jackson River built?

It was built in 1931, making it 94 years old in 2025.

What condition is Mill Gap RD over Jackson 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 September 2024.

How much traffic does Mill Gap RD over Jackson River carry?

About 510 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Mill Gap RD over Jackson River?

The structure is 65 ft (19.8 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns Mill Gap RD over Jackson River?

It is owned by the State Highway Agency.