US Bridges

I-65 SB over 15th Avenue

Fair

Lake County, Indiana · 01.53 N I-80 · Structure no. 038890

Built
1965
60 years old, rebuilt 2000
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
156 ft
3 main spans
Daily traffic
4,191
2022 count
Owner
State
State Highway Agency

About this bridge

I-65 SB over 15th Avenue is a steel continuous stringer/multi-beam or girder carrying I-65 SB over 15th Avenue in Lake County, Indiana. It was built in 1965 and reconstructed in 2000, so it is 60 years old, older than the Indiana average of 46.6 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 4,191 vehicles a day, roughly 18% of them trucks, projected to reach 42,626 by 2030. The structure is 156 ft (47.5 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-65 SB
Crosses15th Avenue
Location01.53 N I-80
RouteInterstate 65
CountyLake County
StateIndiana
Coordinates41.58734, -87.30663
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.6 US tons
Inventory rating38.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span72 ft (21.9 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,191 (2022)
Projected traffic42,626 by 2030
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-65 SB over 15th Avenue built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2000.

What condition is I-65 SB over 15th Avenue 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 March 2023.

How much traffic does I-65 SB over 15th Avenue carry?

About 4,191 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is I-65 SB over 15th Avenue?

The structure is 156 ft (47.5 m) long with a longest span of 72 ft (21.9 m) and a deck 43 ft wide.

Who owns I-65 SB over 15th Avenue?

It is owned by the State Highway Agency.