US Bridges

I-90 EB over 129th Street

Poor

Lake County, Indiana · 01.21 W US 41 · Structure no. 045960

Built
1956
69 years old, rebuilt 1984
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
211 ft
4 main spans
Daily traffic
18,085
2015 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 EB over 129th Street is a steel stringer/multi-beam or girder carrying I-90 EB over 129th Street in Lake County, Indiana. It was built in 1956 and reconstructed in 1984, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 18,085 vehicles a day, roughly 13% of them trucks, projected to reach 40,689 by 2031. The structure is 211 ft (64.3 m) long and 65 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-90 EB
Crosses129th Street
Location01.21 W US 41
RouteInterstate 90
StateIndiana
Coordinates41.66097, -87.51767
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be 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 rating84.5 US tons
Inventory rating50.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length211 ft (64.3 m)
Longest span66 ft (20.1 m)
Deck width65 ft (19.8 m)
Roadway width62 ft (18.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,085 (2015)
Projected traffic40,689 by 2031
Trucks13%
Lanes on structure4
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 129th Street built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1984.

What condition is I-90 EB over 129th Street in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does I-90 EB over 129th Street carry?

About 18,085 vehicles per day (2015 count), of which roughly 13% are trucks.

How long is I-90 EB over 129th Street?

The structure is 211 ft (64.3 m) long with a longest span of 66 ft (20.1 m) and a deck 65 ft wide.

Who owns I-90 EB over 129th Street?

It is owned by the State Toll Authority.