US Bridges

I640 over I640 / SR33

Fair

Knox County, Tennessee · 1 M SE of Whittle Springs · Structure no. 47I06400013

Built
1970
55 years old, rebuilt 2003
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
178 ft
2 main spans
Daily traffic
89,826
2021 count
Owner
State
State Highway Agency

About this bridge

I640 over I640 / SR33 is a steel continuous stringer/multi-beam or girder carrying I640 over I640 / SR33 in Knox County, Tennessee. It was built in 1970 and reconstructed in 2003, so it is 55 years old, older 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 89,826 vehicles a day, roughly 6% of them trucks, projected to reach 156,784 by 2040. The structure is 178 ft (54.4 m) long and 126 ft wide.

Location

Open in Google Maps
CarriesI640
CrossesI640 / SR33
Location1 M SE of Whittle Springs
RouteInterstate 640
CountyKnox County
StateTennessee
Coordinates36.01867, -83.92233
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating50.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length178 ft (54.4 m)
Longest span94 ft (28.5 m)
Deck width126 ft (38.4 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic89,826 (2021)
Projected traffic156,784 by 2040
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 over I640 / SR33 built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2003.

What condition is I640 over I640 / SR33 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 over I640 / SR33 carry?

About 89,826 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I640 over I640 / SR33?

The structure is 178 ft (54.4 m) long with a longest span of 94 ft (28.5 m) and a deck 126 ft wide.

Who owns I640 over I640 / SR33?

It is owned by the State Highway Agency.