US Bridges

I24 Wbl over I-24 WB / Shellmound Rd.

Fair

Marion County, Tennessee · 3 MI S of SR28 · Structure no. 58I00240069

Built
1965
60 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete Continuous
Length
106 ft
3 main spans
Daily traffic
52,102
2021 count
Owner
State
State Highway Agency

About this bridge

I24 Wbl over I-24 WB / Shellmound Rd. is a concrete continuous tee beam carrying I24 Wbl over I-24 WB / Shellmound Rd. 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 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 52,102 vehicles a day, roughly 7% of them trucks, projected to reach 77,918 by 2041. The structure is 106 ft (32.3 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI24 Wbl
CrossesI-24 WB / Shellmound Rd.
Location3 MI S of SR28
RouteInterstate 24
CountyMarion County
StateTennessee
Coordinates35.04398, -85.6029
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span42 ft (12.8 m)
Deck width40 ft (12.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52,102 (2021)
Projected traffic77,918 by 2041
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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$902,000 (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I24 Wbl over I-24 WB / Shellmound Rd. built?

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

What condition is I24 Wbl over I-24 WB / Shellmound Rd. 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 July 2024.

How much traffic does I24 Wbl over I-24 WB / Shellmound Rd. carry?

About 52,102 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I24 Wbl over I-24 WB / Shellmound Rd.?

The structure is 106 ft (32.3 m) long with a longest span of 42 ft (12.8 m) and a deck 40 ft wide.

Who owns I24 Wbl over I-24 WB / Shellmound Rd.?

It is owned by the State Highway Agency.