US Bridges

15 Mile Road over I-94

Good

Calhoun County, Michigan · 0.4 MI W of I-69 · Structure no. 000000000001271

Built
2022
3 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
268 ft
2 main spans
Daily traffic
600
2020 count
Owner
State
State Highway Agency

About this bridge

15 Mile Road over I-94 is a prestressed concrete stringer/multi-beam or girder carrying 15 Mile Road over I-94 in Calhoun 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 600 vehicles a day, roughly 3% of them trucks, projected to reach 690 by 2040. The structure is 268 ft (81.8 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries15 Mile Road
CrossesI-94
Location0.4 MI W of I-69
RouteCounty Highway 0
CountyCalhoun County
StateMichigan
Coordinates42.29724, -85.00375
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length268 ft (81.8 m)
Longest span132 ft (40.2 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2020)
Projected traffic690 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 15 Mile Road over I-94 built?

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

What condition is 15 Mile Road over I-94 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 August 2023.

How much traffic does 15 Mile Road over I-94 carry?

About 600 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is 15 Mile Road over I-94?

The structure is 268 ft (81.8 m) long with a longest span of 132 ft (40.2 m) and a deck 35 ft wide.

Who owns 15 Mile Road over I-94?

It is owned by the State Highway Agency.