US Bridges

I-90 Ramp C over I-90 Ramp D

Good

Lake County, Indiana · 00.36 E SR 51 · Structure no. 046690

Built
1956
69 years old, rebuilt 2015
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
469 ft
9 main spans
Daily traffic
8,480
2009 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 Ramp C over I-90 Ramp D is a steel continuous stringer/multi-beam or girder carrying I-90 Ramp C over I-90 Ramp D in Lake County, Indiana. It was built in 1956 and reconstructed in 2015, 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,480 vehicles a day, roughly 48% of them trucks, projected to reach 12,029 by 2031. The structure is 469 ft (143 m) long and 27 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-90 Ramp C
CrossesI-90 Ramp D
Location00.36 E SR 51
RouteInterstate 90
CountyLake County
StateIndiana
Coordinates41.59269, -87.23254
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating30.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length469 ft (143 m)
Longest span63 ft (19.2 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,480 (2009)
Projected traffic12,029 by 2031
Trucks48%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 Ramp C over I-90 Ramp D built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2015.

What condition is I-90 Ramp C over I-90 Ramp D 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 Ramp C over I-90 Ramp D carry?

About 8,480 vehicles per day (2009 count), of which roughly 48% are trucks.

How long is I-90 Ramp C over I-90 Ramp D?

The structure is 469 ft (143 m) long with a longest span of 63 ft (19.2 m) and a deck 27 ft wide.

Who owns I-90 Ramp C over I-90 Ramp D?

It is owned by the State Toll Authority.