US Bridges

I40 over Middlebrook/Rr/E 3rd Crk

Good

Knox County, Tennessee · Downtown Knoxville · Structure no. 47I00400175

Built
2001
24 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
761 ft
9 main spans
Daily traffic
122,506
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over Middlebrook/Rr/E 3rd Crk is a steel continuous stringer/multi-beam or girder carrying I40 over Middlebrook/Rr/E 3rd Crk in Knox County, Tennessee. It was built in 2001, so it is 24 years old, younger 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 122,506 vehicles a day, roughly 6% of them trucks, projected to reach 235,872 by 2041. The structure is 761 ft (231.9 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI40
CrossesMiddlebrook/Rr/E 3rd Crk
LocationDowntown Knoxville
RouteInterstate 40
CountyKnox County
StateTennessee
Coordinates35.96184, -83.95316
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.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length761 ft (231.9 m)
Longest span145 ft (44.2 m)
Deck width33 ft (10 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic122,506 (2021)
Projected traffic235,872 by 2041
Trucks6%
Lanes on structure1
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I40 over Middlebrook/Rr/E 3rd Crk built?

It was built in 2001, making it 24 years old in 2025.

What condition is I40 over Middlebrook/Rr/E 3rd Crk 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 December 2024.

How much traffic does I40 over Middlebrook/Rr/E 3rd Crk carry?

About 122,506 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I40 over Middlebrook/Rr/E 3rd Crk?

The structure is 761 ft (231.9 m) long with a longest span of 145 ft (44.2 m) and a deck 33 ft wide.

Who owns I40 over Middlebrook/Rr/E 3rd Crk?

It is owned by the State Highway Agency.