US Bridges

I75 Nbl over Nfa A455

Fair

McMinn County, Tennessee · 9.4 Mi. from Bradley Co. · Structure no. 54I00750013

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete Continuous
Length
121 ft
3 main spans
Daily traffic
42,449
2021 count
Owner
State
State Highway Agency

About this bridge

I75 Nbl over Nfa A455 is a concrete continuous tee beam carrying I75 Nbl over Nfa A455 in McMinn County, Tennessee. It was built in 1972, so it is 53 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 42,449 vehicles a day, roughly 7% of them trucks, projected to reach 67,918 by 2042. The structure is 121 ft (36.9 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI75 Nbl
CrossesNfa A455
Location9.4 Mi. from Bradley Co.
RouteInterstate 75
Coordinates35.415, -84.69666
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length121 ft (36.9 m)
Longest span55 ft (16.8 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,449 (2021)
Projected traffic67,918 by 2042
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I75 Nbl over Nfa A455 built?

It was built in 1972, making it 53 years old in 2025.

What condition is I75 Nbl over Nfa A455 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 April 2024.

How much traffic does I75 Nbl over Nfa A455 carry?

About 42,449 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I75 Nbl over Nfa A455?

The structure is 121 ft (36.9 m) long with a longest span of 55 ft (16.8 m) and a deck 44 ft wide.

Who owns I75 Nbl over Nfa A455?

It is owned by the State Highway Agency.