US Bridges

I24 over I24 Rl / SR 76

Fair

Montgomery County, Tennessee · 6.7 Mi.Nw.Of Robertson · Structure no. 63I00240015

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
231 ft
2 main spans
Daily traffic
88,998
2021 count
Owner
State
State Highway Agency

About this bridge

I24 over I24 Rl / SR 76 is a concrete continuous box beam or girders - multiple carrying I24 over I24 Rl / SR 76 in Montgomery County, Tennessee. It was built in 1972, so it is 53 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 88,998 vehicles a day, roughly 7% of them trucks, projected to reach 142,397 by 2042. The structure is 231 ft (70.4 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI24
CrossesI24 Rl / SR 76
Location6.7 Mi.Nw.Of Robertson
RouteInterstate 24
CountyMontgomery County
StateTennessee
Coordinates36.52543, -87.22189
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckOther
Main spans2
Design loadHS 20
Structure length231 ft (70.4 m)
Longest span116 ft (35.4 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88,998 (2021)
Projected traffic142,397 by 2042
Trucks7%
Lanes on structure2
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I24 over I24 Rl / SR 76 built?

It was built in 1972, making it 53 years old in 2025.

What condition is I24 over I24 Rl / SR 76 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 September 2024.

How much traffic does I24 over I24 Rl / SR 76 carry?

About 88,998 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I24 over I24 Rl / SR 76?

The structure is 231 ft (70.4 m) long with a longest span of 116 ft (35.4 m) and a deck 44 ft wide.

Who owns I24 over I24 Rl / SR 76?

It is owned by the State Highway Agency.