US Bridges

I640 Ll over I640-LL / SR 1-SOU. Rr.

Fair

Knox County, Tennessee · Just N. of I-40 Jct. · Structure no. 47I06400036

Built
1982
43 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
470 ft
4 main spans
Daily traffic
69,368
2021 count
Owner
State
State Highway Agency

About this bridge

I640 Ll over I640-LL / SR 1-SOU. Rr. is a steel continuous stringer/multi-beam or girder carrying I640 Ll over I640-LL / SR 1-SOU. Rr. in Knox County, Tennessee. It was built in 1982, so it is 43 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 6 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 69,368 vehicles a day, roughly 6% of them trucks, projected to reach 119,040 by 2040. The structure is 470 ft (143.3 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI640 Ll
CrossesI640-LL / SR 1-SOU. Rr.
LocationJust N. of I-40 Jct.
RouteInterstate 640
CountyKnox County
StateTennessee
Coordinates36.0181, -83.86089
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length470 ft (143.3 m)
Longest span132 ft (40.3 m)
Deck width72 ft (21.9 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69,368 (2021)
Projected traffic119,040 by 2040
Trucks6%
Lanes on structure4
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-LL / SR 1-SOU. Rr. built?

It was built in 1982, making it 43 years old in 2025.

What condition is I640 Ll over I640-LL / SR 1-SOU. Rr. 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-LL / SR 1-SOU. Rr. carry?

About 69,368 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I640 Ll over I640-LL / SR 1-SOU. Rr.?

The structure is 470 ft (143.3 m) long with a longest span of 132 ft (40.3 m) and a deck 72 ft wide.

Who owns I640 Ll over I640-LL / SR 1-SOU. Rr.?

It is owned by the State Highway Agency.