US Bridges

I75 over SR 1

Good

Loudon County, Tennessee · 3 M NE of Knox CO LN · Structure no. 53I00750040

Built
1964
61 years old, rebuilt 1979
Condition
Good
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
155 ft
3 main spans
Daily traffic
58,302
2021 count
Owner
State
State Highway Agency

About this bridge

I75 over SR 1 is a concrete continuous tee beam carrying I75 over SR 1 in Loudon County, Tennessee. It was built in 1964 and reconstructed in 1979, so it is 61 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 58,302 vehicles a day, roughly 6% of them trucks, projected to reach 93,283 by 2042. The structure is 155 ft (47.2 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI75
CrossesSR 1
Location3 M NE of Knox CO LN
RouteInterstate 75
Coordinates35.84312, -84.27097
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating38.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span62 ft (18.9 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,302 (2021)
Projected traffic93,283 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 over SR 1 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1979.

What condition is I75 over SR 1 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does I75 over SR 1 carry?

About 58,302 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I75 over SR 1?

The structure is 155 ft (47.2 m) long with a longest span of 62 ft (18.9 m) and a deck 44 ft wide.

Who owns I75 over SR 1?

It is owned by the State Highway Agency.