US Bridges

I-465 EB over Zionsville Road

Fair

Boone County, Indiana · 01.71 W US 421 · Structure no. 050600

Built
1967
58 years old, rebuilt 2004
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
145 ft
3 main spans
Daily traffic
55,699
2021 count
Owner
State
State Highway Agency

About this bridge

I-465 EB over Zionsville Road is a steel continuous stringer/multi-beam or girder carrying I-465 EB over Zionsville Road in Boone County, Indiana. It was built in 1967 and reconstructed in 2004, so it is 58 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 55,699 vehicles a day, roughly 10% of them trucks, projected to reach 89,207 by 2032. The structure is 145 ft (44.1 m) long and 62 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-465 EB
CrossesZionsville Road
Location01.71 W US 421
RouteInterstate 465
CountyBoone County
StateIndiana
Coordinates39.92775, -86.25987
Functional classRural 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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
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 alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length145 ft (44.1 m)
Longest span66 ft (20.1 m)
Deck width62 ft (18.8 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,699 (2021)
Projected traffic89,207 by 2032
Trucks10%
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 Zionsville Road built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2004.

What condition is I-465 EB over Zionsville Road 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 Zionsville Road carry?

About 55,699 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is I-465 EB over Zionsville Road?

The structure is 145 ft (44.1 m) long with a longest span of 66 ft (20.1 m) and a deck 62 ft wide.

Who owns I-465 EB over Zionsville Road?

It is owned by the State Highway Agency.