US Bridges

I640 Ll over I640-LL (wb) / I275

Fair

Knox County, Tennessee · Sharps Gap Exchange · Structure no. 47I02750020

Built
1962
63 years old, rebuilt 1981
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete Continuous
Length
181 ft
4 main spans
Daily traffic
89,826
2021 count
Owner
State
State Highway Agency

About this bridge

I640 Ll over I640-LL (wb) / I275 is a concrete continuous tee beam carrying I640 Ll over I640-LL (wb) / I275 in Knox County, Tennessee. It was built in 1962 and reconstructed in 1981, so it is 63 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 181 ft (55.1 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI640 Ll
CrossesI640-LL (wb) / I275
LocationSharps Gap Exchange
RouteInterstate 640
Coordinates36.00003, -83.95848
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 rating90.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length181 ft (55.1 m)
Longest span53 ft (16.1 m)
Deck width57 ft (17.3 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deck18 ft (5.6 m)

Traffic and service

Average daily traffic89,826 (2021)
Projected traffic156,784 by 2040
Trucks6%
Lanes on structure3
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 I640 Ll over I640-LL (wb) / I275 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1981.

What condition is I640 Ll over I640-LL (wb) / I275 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 (wb) / I275 carry?

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

How long is I640 Ll over I640-LL (wb) / I275?

The structure is 181 ft (55.1 m) long with a longest span of 53 ft (16.1 m) and a deck 57 ft wide.

Who owns I640 Ll over I640-LL (wb) / I275?

It is owned by the State Highway Agency.