US Bridges

I640 Ll over I640-WB / Sou Rr-Nora LN

Fair

Knox County, Tennessee · N.E. of SR 33 Exchange · Structure no. 47I06400020

Built
1981
44 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
730 ft
4 main spans
Daily traffic
71,684
2021 count
Owner
State
State Highway Agency

About this bridge

I640 Ll over I640-WB / Sou Rr-Nora LN is a steel continuous stringer/multi-beam or girder carrying I640 Ll over I640-WB / Sou Rr-Nora LN in Knox County, Tennessee. It was built in 1981, so it is 44 years old, younger 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 5 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 71,684 vehicles a day, roughly 6% of them trucks, projected to reach 127,584 by 2040. The structure is 730 ft (222.5 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI640 Ll
CrossesI640-WB / Sou Rr-Nora LN
LocationN.E. of SR 33 Exchange
RouteInterstate 640
CountyKnox County
StateTennessee
Coordinates36.02133, -83.9148
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length730 ft (222.5 m)
Longest span200 ft (61 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71,684 (2021)
Projected traffic127,584 by 2040
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I640 Ll over I640-WB / Sou Rr-Nora LN built?

It was built in 1981, making it 44 years old in 2025.

What condition is I640 Ll over I640-WB / Sou Rr-Nora LN 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 I640 Ll over I640-WB / Sou Rr-Nora LN carry?

About 71,684 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I640 Ll over I640-WB / Sou Rr-Nora LN?

The structure is 730 ft (222.5 m) long with a longest span of 200 ft (61 m) and a deck 62 ft wide.

Who owns I640 Ll over I640-WB / Sou Rr-Nora LN?

It is owned by the State Highway Agency.