US Bridges

I-90 EB over 108th Street

Good

Lake County, Indiana · 00.26 E US 12 · Structure no. 045880

Built
1956
69 years old, rebuilt 1985
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
3 main spans
Daily traffic
18,356
2011 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 EB over 108th Street is a steel stringer/multi-beam or girder carrying I-90 EB over 108th Street in Lake County, Indiana. It was built in 1956 and reconstructed in 1985, 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 18,356 vehicles a day, roughly 14% of them trucks, projected to reach 40,689 by 2031. The structure is 127 ft (38.7 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-90 EB
Crosses108th Street
Location00.26 E US 12
RouteInterstate 90
StateIndiana
Coordinates41.69866, -87.52216
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating47.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span38 ft (11.6 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,356 (2011)
Projected traffic40,689 by 2031
Trucks14%
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 EB over 108th Street built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1985.

What condition is I-90 EB over 108th Street 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 November 2023.

How much traffic does I-90 EB over 108th Street carry?

About 18,356 vehicles per day (2011 count), of which roughly 14% are trucks.

How long is I-90 EB over 108th Street?

The structure is 127 ft (38.7 m) long with a longest span of 38 ft (11.6 m) and a deck 35 ft wide.

Who owns I-90 EB over 108th Street?

It is owned by the State Toll Authority.