US Bridges

M-94 over Manistique River

Fair

Schoolcraft County, Michigan · In Manistique · Structure no. 000000000009674

Built
1918
107 years old, rebuilt 2004
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
294 ft
5 main spans
Daily traffic
10,220
2007 count
Owner
State
State Highway Agency

About this bridge

M-94 over Manistique River is a concrete continuous slab carrying M-94 over Manistique River in Schoolcraft County, Michigan. It was built in 1918 and reconstructed in 2004, so it is 107 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,220 vehicles a day, roughly 3% of them trucks, projected to reach 10,633 by 2018. The structure is 294 ft (89.5 m) long and 66 ft wide. If it were closed, the detour would be 123 mi (198 km).

Location

Open in Google Maps
CarriesM-94
CrossesManistique River
LocationIn Manistique
RouteState Highway 94
CountySchoolcraft County
StateMichigan
Coordinates45.96181, -86.24957
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.2 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5 (+3 approach)
Design loadH 15
Structure length294 ft (89.5 m)
Longest span39 ft (11.9 m)
Deck width66 ft (20.1 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,220 (2007)
Projected traffic10,633 by 2018
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123 mi (198 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$175,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-94 over Manistique River built?

It was built in 1918, making it 107 years old in 2025. It was reconstructed in 2004.

What condition is M-94 over Manistique River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does M-94 over Manistique River carry?

About 10,220 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is M-94 over Manistique River?

The structure is 294 ft (89.5 m) long with a longest span of 39 ft (11.9 m) and a deck 66 ft wide.

Who owns M-94 over Manistique River?

It is owned by the State Highway Agency.