US Bridges

Post Road over I-74

Fair

Marion County, Indiana · 02.41 E I-465 · Structure no. 044590

Built
1958
67 years old, rebuilt 2020
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
309 ft
4 main spans
Daily traffic
9,850
2019 count
Owner
State
State Highway Agency

About this bridge

Post Road over I-74 is a steel continuous stringer/multi-beam or girder carrying Post Road over I-74 in Marion County, Indiana. It was built in 1958 and reconstructed in 2020, so it is 67 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 9,850 vehicles a day, roughly 5% of them trucks, projected to reach 10,880 by 2039. The structure is 309 ft (94.3 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPost Road
CrossesI-74
Location02.41 E I-465
RouteCity Street 0
CountyMarion County
StateIndiana
Coordinates39.71551, -86.00831
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 rating32.8 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 length309 ft (94.3 m)
Longest span100 ft (30.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,850 (2019)
Projected traffic10,880 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Post Road over I-74 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2020.

What condition is Post Road over I-74 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 July 2023.

How much traffic does Post Road over I-74 carry?

About 9,850 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Post Road over I-74?

The structure is 309 ft (94.3 m) long with a longest span of 100 ft (30.6 m) and a deck 35 ft wide.

Who owns Post Road over I-74?

It is owned by the State Highway Agency.