US Bridges

I40 over Overflow

Fair

Madison County, Tennessee · 1.4 MI W of SR20 · Structure no. 57I00400017

Built
1960
65 years old, rebuilt 1992
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete
Length
317 ft
11 main spans
Daily traffic
49,487
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over Overflow is a concrete tee beam carrying I40 over Overflow in Madison County, Tennessee. It was built in 1960 and reconstructed in 1992, so it is 65 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 5 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 49,487 vehicles a day, roughly 8% of them trucks, projected to reach 79,179 by 2042. The structure is 317 ft (96.6 m) long and 44 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesI40
CrossesOverflow
Location1.4 MI W of SR20
RouteInterstate 40
CountyMadison County
StateTennessee
Coordinates35.64744, -88.90006
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length317 ft (96.6 m)
Longest span29 ft (8.8 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,487 (2021)
Projected traffic79,179 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I40 over Overflow built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1992.

What condition is I40 over Overflow 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 2023.

How much traffic does I40 over Overflow carry?

About 49,487 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I40 over Overflow?

The structure is 317 ft (96.6 m) long with a longest span of 29 ft (8.8 m) and a deck 44 ft wide.

Who owns I40 over Overflow?

It is owned by the State Highway Agency.