US Bridges

I40 over I40 / Chilhowee Road

Fair

Knox County, Tennessee · .6 M SE of Cayuga DR · Structure no. 47I00400089

Built
1982
43 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
184 ft
2 main spans
Daily traffic
102,519
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over I40 / Chilhowee Road is a prestressed concrete continuous box beam or girders - single or spread carrying I40 over I40 / Chilhowee Road 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 102,519 vehicles a day, roughly 6% of them trucks, projected to reach 170,192 by 2041. The structure is 184 ft (56 m) long and 156 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI40
CrossesI40 / Chilhowee Road
Location.6 M SE of Cayuga DR
RouteInterstate 40
CountyKnox County
StateTennessee
Coordinates36.01291, -83.85468
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 rating60.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length184 ft (56 m)
Longest span92 ft (28 m)
Deck width156 ft (47.6 m)
Roadway width154 ft (47 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102,519 (2021)
Projected traffic170,192 by 2041
Trucks6%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1.2 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I40 over I40 / Chilhowee Road built?

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

What condition is I40 over I40 / Chilhowee Road 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 December 2024.

How much traffic does I40 over I40 / Chilhowee Road carry?

About 102,519 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I40 over I40 / Chilhowee Road?

The structure is 184 ft (56 m) long with a longest span of 92 ft (28 m) and a deck 156 ft wide.

Who owns I40 over I40 / Chilhowee Road?

It is owned by the State Highway Agency.