US Bridges

I-465 WB over Spring Mill Run

Fair

Hamilton County, Indiana · 00.91 W US 31 · Structure no. 050500

Built
1966
59 years old, rebuilt 2018
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
89 ft
3 main spans
Daily traffic
61,327
2021 count
Owner
State
State Highway Agency

About this bridge

I-465 WB over Spring Mill Run is a concrete continuous slab carrying I-465 WB over Spring Mill Run in Hamilton County, Indiana. It was built in 1966 and reconstructed in 2018, 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 5 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 61,327 vehicles a day, roughly 5% of them trucks, projected to reach 128,795 by 2035. The structure is 89 ft (27.2 m) long and 54 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-465 WB
CrossesSpring Mill Run
Location00.91 W US 31
RouteInterstate 465
StateIndiana
Coordinates39.92892, -86.17607
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length89 ft (27.2 m)
Longest span33 ft (10.2 m)
Deck width54 ft (16.6 m)
Roadway width52 ft (15.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61,327 (2021)
Projected traffic128,795 by 2035
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-465 WB over Spring Mill Run built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2018.

What condition is I-465 WB over Spring Mill Run 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 WB over Spring Mill Run carry?

About 61,327 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is I-465 WB over Spring Mill Run?

The structure is 89 ft (27.2 m) long with a longest span of 33 ft (10.2 m) and a deck 54 ft wide.

Who owns I-465 WB over Spring Mill Run?

It is owned by the State Highway Agency.