US Bridges

I40 over Caney Fork River

Poor

Smith County, Tennessee · In Smith Co. · Structure no. 80I00400032

Built
1962
63 years old, rebuilt 1991
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
395 ft
5 main spans
Daily traffic
44,898
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over Caney Fork River is a prestressed concrete stringer/multi-beam or girder carrying I40 over Caney Fork River in Smith County, Tennessee. It was built in 1962 and reconstructed in 1991, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 44,898 vehicles a day, roughly 7% of them trucks, projected to reach 71,837 by 2042. The structure is 395 ft (120.4 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI40
CrossesCaney Fork River
LocationIn Smith Co.
RouteInterstate 40
Coordinates36.14142, -85.83282
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.8 US tons
Inventory rating67.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length395 ft (120.4 m)
Longest span83 ft (25.3 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,898 (2021)
Projected traffic71,837 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$803,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I40 over Caney Fork River built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1991.

What condition is I40 over Caney Fork River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does I40 over Caney Fork River carry?

About 44,898 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I40 over Caney Fork River?

The structure is 395 ft (120.4 m) long with a longest span of 83 ft (25.3 m) and a deck 44 ft wide.

Who owns I40 over Caney Fork River?

It is owned by the State Highway Agency.