US Bridges

I24 over Tennessee River

Fair

Marion County, Tennessee · 0.8 MI S of SR156 · Structure no. 58I00240043

Built
1965
60 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
3,115 ft
4 main spans
Daily traffic
53,902
2021 count
Owner
State
State Highway Agency

About this bridge

I24 over Tennessee River is a steel continuous girder and floorbeam system carrying I24 over Tennessee River in Marion County, Tennessee. It was built in 1965, so it is 60 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.

It carries about 53,902 vehicles a day, roughly 7% of them trucks, projected to reach 78,243 by 2042. The structure is 3,115 ft (949.3 m) long and 71 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesI24
CrossesTennessee River
Location0.8 MI S of SR156
RouteInterstate 24
CountyMarion County
StateTennessee
Coordinates35.02365, -85.55437
Functional classRural Principal Arterial - Interstate

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating20.7 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+15 approach)
Design loadHS 20
Structure length3,115 ft (949.3 m)
Longest span420 ft (128 m)
Deck width71 ft (21.5 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,902 (2021)
Projected traffic78,243 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$104.4 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I24 over Tennessee River built?

It was built in 1965, making it 60 years old in 2025.

What condition is I24 over Tennessee 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 I24 over Tennessee River carry?

About 53,902 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I24 over Tennessee River?

The structure is 3,115 ft (949.3 m) long with a longest span of 420 ft (128 m) and a deck 71 ft wide.

Who owns I24 over Tennessee River?

It is owned by the State Highway Agency.