US Bridges

I-90 WB over Central Avenue/Cr 975 N

Good

Porter County, Indiana · 01.78 W SR 149 · Structure no. 046820

Built
1956
69 years old, rebuilt 2018
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
217 ft
3 main spans
Daily traffic
16,295
2014 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 WB over Central Avenue/Cr 975 N is a steel stringer/multi-beam or girder carrying I-90 WB over Central Avenue/Cr 975 N in Porter County, Indiana. It was built in 1956 and reconstructed in 2018, so it is 69 years old, older than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 16,295 vehicles a day, roughly 24% of them trucks, projected to reach 48,801 by 2031. The structure is 217 ft (66.1 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-90 WB
CrossesCentral Avenue/Cr 975 N
Location01.78 W SR 149
RouteInterstate 90
CountyPorter County
StateIndiana
Coordinates41.5759, -87.15621
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.3 US tons
Inventory rating55.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length217 ft (66.1 m)
Longest span49 ft (14.9 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,295 (2014)
Projected traffic48,801 by 2031
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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-90 WB over Central Avenue/Cr 975 N built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2018.

What condition is I-90 WB over Central Avenue/Cr 975 N in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does I-90 WB over Central Avenue/Cr 975 N carry?

About 16,295 vehicles per day (2014 count), of which roughly 24% are trucks.

How long is I-90 WB over Central Avenue/Cr 975 N?

The structure is 217 ft (66.1 m) long with a longest span of 49 ft (14.9 m) and a deck 35 ft wide.

Who owns I-90 WB over Central Avenue/Cr 975 N?

It is owned by the State Toll Authority.