US Bridges

I40 over I40 / North 6th St.

Good

Knox County, Tennessee · 1.1 M SW of Washington ST · Structure no. 47I00400075

Built
1967
58 years old, rebuilt 2006
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
178 ft
3 main spans
Daily traffic
91,591
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over I40 / North 6th St. is a steel continuous stringer/multi-beam or girder carrying I40 over I40 / North 6th St. in Knox County, Tennessee. It was built in 1967 and reconstructed in 2006, so it is 58 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 91,591 vehicles a day, roughly 6% of them trucks, projected to reach 162,176 by 2041. The structure is 178 ft (54.2 m) long and 169 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI40
CrossesI40 / North 6th St.
Location1.1 M SW of Washington ST
RouteInterstate 40
Coordinates35.98421, -83.91492
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length178 ft (54.2 m)
Longest span80 ft (24.3 m)
Deck width169 ft (51.5 m)
Roadway width165 ft (50.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic91,591 (2021)
Projected traffic162,176 by 2041
Trucks6%
Lanes on structure9
Traffic directionTwo-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 I40 over I40 / North 6th St. built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2006.

What condition is I40 over I40 / North 6th St. 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 November 2024.

How much traffic does I40 over I40 / North 6th St. carry?

About 91,591 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I40 over I40 / North 6th St.?

The structure is 178 ft (54.2 m) long with a longest span of 80 ft (24.3 m) and a deck 169 ft wide.

Who owns I40 over I40 / North 6th St.?

It is owned by the State Highway Agency.