US Bridges

I75 730907D over Southern Railway

Fair

Anderson County, Tennessee · 11.59 Mi.From Knox Co.Ln. · Structure no. 01I00750039

Built
1965
60 years old, rebuilt 1985
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
162 ft
3 main spans
Daily traffic
41,884
2021 count
Owner
State
State Highway Agency

About this bridge

I75 730907D over Southern Railway is a concrete tee beam carrying I75 730907D over Southern Railway in Anderson County, Tennessee. It was built in 1965 and reconstructed in 1985, 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 41,884 vehicles a day, roughly 6% of them trucks, projected to reach 63,254 by 2041. The structure is 162 ft (49.4 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI75 730907D
CrossesSouthern Railway
Location11.59 Mi.From Knox Co.Ln.
RouteInterstate 75
Coordinates36.2357, -84.1653
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating33.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length162 ft (49.4 m)
Longest span54 ft (16.5 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,884 (2021)
Projected traffic63,254 by 2041
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I75 730907D over Southern Railway built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1985.

What condition is I75 730907D over Southern Railway 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 August 2023.

How much traffic does I75 730907D over Southern Railway carry?

About 41,884 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I75 730907D over Southern Railway?

The structure is 162 ft (49.4 m) long with a longest span of 54 ft (16.5 m) and a deck 55 ft wide.

Who owns I75 730907D over Southern Railway?

It is owned by the State Highway Agency.