US Bridges

73rd Avenue over I-65

Fair

Lake County, Indiana · 00.94 N US 30 · Structure no. 038580

Built
1965
60 years old, rebuilt 1992
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
206 ft
4 main spans
Daily traffic
13,255
2004 count
Owner
State
State Highway Agency

About this bridge

73rd Avenue over I-65 is a steel continuous stringer/multi-beam or girder carrying 73rd Avenue over I-65 in Lake County, Indiana. It was built in 1965 and reconstructed in 1992, 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 13,255 vehicles a day, roughly 5% of them trucks, projected to reach 18,676 by 2030. The structure is 206 ft (62.7 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries73rd Avenue
CrossesI-65
Location00.94 N US 30
RouteCity Street 0
CountyLake County
StateIndiana
Coordinates41.48472, -87.32135
Functional classUrban Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating25.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length206 ft (62.7 m)
Longest span65 ft (19.9 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,255 (2004)
Projected traffic18,676 by 2030
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 73rd Avenue over I-65 built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1992.

What condition is 73rd Avenue over I-65 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 73rd Avenue over I-65 carry?

About 13,255 vehicles per day (2004 count), of which roughly 5% are trucks.

How long is 73rd Avenue over I-65?

The structure is 206 ft (62.7 m) long with a longest span of 65 ft (19.9 m) and a deck 40 ft wide.

Who owns 73rd Avenue over I-65?

It is owned by the State Highway Agency.