US Bridges

I-465 EB over US 421

Fair

Marion County, Indiana · 03.89 W US 31 · Structure no. 050540

Built
1966
59 years old, rebuilt 1991
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
160 ft
2 main spans
Daily traffic
64,657
2004 count
Owner
State
State Highway Agency

About this bridge

I-465 EB over US 421 is a steel continuous stringer/multi-beam or girder carrying I-465 EB over US 421 in Marion County, Indiana. It was built in 1966 and reconstructed in 1991, so it is 59 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 64,657 vehicles a day, roughly 5% of them trucks, projected to reach 128,795 by 2035. The structure is 160 ft (48.7 m) long and 54 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-465 EB
CrossesUS 421
Location03.89 W US 31
RouteInterstate 465
CountyMarion County
StateIndiana
Coordinates39.92361, -86.22841
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length160 ft (48.7 m)
Longest span78 ft (23.9 m)
Deck width54 ft (16.6 m)
Roadway width52 ft (15.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,657 (2004)
Projected traffic128,795 by 2035
Trucks5%
Lanes on structure3
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-465 EB over US 421 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1991.

What condition is I-465 EB over US 421 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 2024.

How much traffic does I-465 EB over US 421 carry?

About 64,657 vehicles per day (2004 count), of which roughly 5% are trucks.

How long is I-465 EB over US 421?

The structure is 160 ft (48.7 m) long with a longest span of 78 ft (23.9 m) and a deck 54 ft wide.

Who owns I-465 EB over US 421?

It is owned by the State Highway Agency.