US Bridges

Von Karman Road over Hyperballistics Range

FairPosted for load

Franklin County, Tennessee · 0.7 Miles West of Base En · Structure no. AFTNANZY00004

Built
1960
65 years old
Condition
Fair
inspected December 2024
Type
Frame
Concrete
Length
20 ft
1 main span
Daily traffic
150
2020 count
Owner
Federal
Air Force

About this bridge

Von Karman Road over Hyperballistics Range is a concrete frame carrying Von Karman Road over Hyperballistics Range in Franklin County, Tennessee. It was built in 1960, so it is 65 years old, older than the Tennessee average of 47.4 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, projected to reach 180 by 2040. The structure is 20 ft (6.1 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesVon Karman Road
CrossesHyperballistics Range
Location0.7 Miles West of Base En
RouteFederal Lands Road 0
CountyFranklin County
StateTennessee
Coordinates35.38567, -86.043
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.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33 US tons
Inventory rating19 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width51 ft (15.5 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic180 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerAir Force
Maintained byAir Force
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$39,000 (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Von Karman Road over Hyperballistics Range built?

It was built in 1960, making it 65 years old in 2025.

What condition is Von Karman Road over Hyperballistics Range 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 December 2024.

How much traffic does Von Karman Road over Hyperballistics Range carry?

About 150 vehicles per day (2020 count).

How long is Von Karman Road over Hyperballistics Range?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 51 ft wide.

Who owns Von Karman Road over Hyperballistics Range?

It is owned by the Air Force.