US Bridges

M-90 over Black River

Good

Sanilac County, Michigan · 4.7 MI W US-25 in Croswel · Structure no. 000000000009459

Built
2023
2 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
209 ft
3 main spans
Daily traffic
8,400
2021 count
Owner
State
State Highway Agency

About this bridge

M-90 over Black River is a prestressed concrete stringer/multi-beam or girder carrying M-90 over Black River in Sanilac County, Michigan. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,400 vehicles a day, roughly 2% of them trucks, projected to reach 9,250 by 2041. The structure is 209 ft (63.7 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesM-90
CrossesBlack River
Location4.7 MI W US-25 in Croswel
RouteState Highway 90
CountySanilac County
StateMichigan
Coordinates43.26445, -82.62339
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length209 ft (63.7 m)
Longest span72 ft (21.9 m)
Deck width53 ft (16.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,400 (2021)
Projected traffic9,250 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$169,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-90 over Black River built?

It was built in 2023, making it 2 years old in 2025.

What condition is M-90 over Black River 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 2024.

How much traffic does M-90 over Black River carry?

About 8,400 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is M-90 over Black River?

The structure is 209 ft (63.7 m) long with a longest span of 72 ft (21.9 m) and a deck 53 ft wide.

Who owns M-90 over Black River?

It is owned by the State Highway Agency.