US Bridges

I-94 over Portage Road

Good

Kalamazoo County, Michigan · 4.0 MI E of US-131 · Structure no. 000000000004578

Built
2022
3 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
223 ft
1 main span
Daily traffic
67,300
2020 count
Owner
State
State Highway Agency

About this bridge

I-94 over Portage Road is a steel stringer/multi-beam or girder carrying I-94 over Portage Road in Kalamazoo County, Michigan. It was built in 2022, so it is 3 years old, younger than the Michigan average of 48.3 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 67,300 vehicles a day, roughly 16% of them trucks, projected to reach 74,350 by 2040. The structure is 223 ft (68 m) long and 127 ft wide.

Location

Open in Google Maps
CarriesI-94
CrossesPortage Road
Location4.0 MI E of US-131
RouteInterstate 94
CountyKalamazoo County
StateMichigan
Coordinates42.24497, -85.56019
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length223 ft (68 m)
Longest span219 ft (66.8 m)
Deck width127 ft (38.6 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,300 (2020)
Projected traffic74,350 by 2040
Trucks16%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-94 over Portage Road built?

It was built in 2022, making it 3 years old in 2025.

What condition is I-94 over Portage Road 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 September 2024.

How much traffic does I-94 over Portage Road carry?

About 67,300 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I-94 over Portage Road?

The structure is 223 ft (68 m) long with a longest span of 219 ft (66.8 m) and a deck 127 ft wide.

Who owns I-94 over Portage Road?

It is owned by the State Highway Agency.