US Bridges

I40 over I40 Viaduct/ 7 Rts-Cr-Rr

Good

Knox County, Tennessee · Downtown Knoxville · Structure no. 47I00400061

Built
1964
61 years old, rebuilt 2006
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,719 ft
31 main spans
Daily traffic
115,780
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over I40 Viaduct/ 7 Rts-Cr-Rr is a steel continuous stringer/multi-beam or girder carrying I40 over I40 Viaduct/ 7 Rts-Cr-Rr in Knox County, Tennessee. It was built in 1964 and reconstructed in 2006, 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 115,780 vehicles a day, roughly 6% of them trucks, projected to reach 160,976 by 2041. The structure is 2,719 ft (828.7 m) long and 170 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI40
CrossesI40 Viaduct/ 7 Rts-Cr-Rr
LocationDowntown Knoxville
RouteInterstate 40
CountyKnox County
StateTennessee
Coordinates35.96881, -83.9277
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans31
Design loadHS 20
Structure length2,719 ft (828.7 m)
Longest span115 ft (35.1 m)
Deck width170 ft (51.7 m)
Roadway width168 ft (51.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115,780 (2021)
Projected traffic160,976 by 2041
Trucks6%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I40 over I40 Viaduct/ 7 Rts-Cr-Rr built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2006.

What condition is I40 over I40 Viaduct/ 7 Rts-Cr-Rr 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 Viaduct/ 7 Rts-Cr-Rr carry?

About 115,780 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I40 over I40 Viaduct/ 7 Rts-Cr-Rr?

The structure is 2,719 ft (828.7 m) long with a longest span of 115 ft (35.1 m) and a deck 170 ft wide.

Who owns I40 over I40 Viaduct/ 7 Rts-Cr-Rr?

It is owned by the State Highway Agency.