US Bridges

I40 over SR 1 (hwy 70S)

Fair

Davidson County, Tennessee · I40/SR1 · Structure no. 19I00400011

Built
1959
66 years old, rebuilt 1992
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
204 ft
4 main spans
Daily traffic
57,507
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over SR 1 (hwy 70S) is a steel continuous stringer/multi-beam or girder carrying I40 over SR 1 (hwy 70S) in Davidson County, Tennessee. It was built in 1959 and reconstructed in 1992, so it is 66 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 57,507 vehicles a day, roughly 7% of them trucks, projected to reach 92,011 by 2042. The structure is 204 ft (62.2 m) long and 130 ft wide. If it were closed, the detour would be 52.8 mi (85 km).

Location

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CarriesI40
CrossesSR 1 (hwy 70S)
LocationI40/SR1
RouteInterstate 40
CountyDavidson County
StateTennessee
Coordinates36.08102, -86.95647
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 inspectionOctober 2023
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 rating57.5 US tons
Inventory rating34.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length204 ft (62.2 m)
Longest span58 ft (17.7 m)
Deck width130 ft (39.6 m)
Roadway width128 ft (39 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,507 (2021)
Projected traffic92,011 by 2042
Trucks7%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed52.8 mi (85 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I40 over SR 1 (hwy 70S) built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1992.

What condition is I40 over SR 1 (hwy 70S) 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 October 2023.

How much traffic does I40 over SR 1 (hwy 70S) carry?

About 57,507 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I40 over SR 1 (hwy 70S)?

The structure is 204 ft (62.2 m) long with a longest span of 58 ft (17.7 m) and a deck 130 ft wide.

Who owns I40 over SR 1 (hwy 70S)?

It is owned by the State Highway Agency.