US Bridges

I24 over I24 Ll / SR 13

Fair

Montgomery County, Tennessee · I24-SR 13 Interchange · Structure no. 63I00240008

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
193 ft
2 main spans
Daily traffic
73,806
2021 count
Owner
State
State Highway Agency

About this bridge

I24 over I24 Ll / SR 13 is a prestressed concrete continuous box beam or girders - single or spread carrying I24 over I24 Ll / SR 13 in Montgomery County, Tennessee. It was built in 1970, so it is 55 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 73,806 vehicles a day, roughly 7% of them trucks, projected to reach 86,938 by 2041. The structure is 193 ft (58.8 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI24
CrossesI24 Ll / SR 13
LocationI24-SR 13 Interchange
RouteInterstate 24
Coordinates36.60035, -87.2826
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating31.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckOther
Main spans2
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span96 ft (29.3 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73,806 (2021)
Projected traffic86,938 by 2041
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I24 over I24 Ll / SR 13 built?

It was built in 1970, making it 55 years old in 2025.

What condition is I24 over I24 Ll / SR 13 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 Ll / SR 13 carry?

About 73,806 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I24 over I24 Ll / SR 13?

The structure is 193 ft (58.8 m) long with a longest span of 96 ft (29.3 m) and a deck 44 ft wide.

Who owns I24 over I24 Ll / SR 13?

It is owned by the State Highway Agency.