US Bridges

M-37 over Manistee River

Fair

Wexford County, Michigan · 0.9 MI N of Sherman · Structure no. 000000000012537

Built
1934
91 years old, rebuilt 1994
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
119 ft
2 main spans
Daily traffic
5,896
2007 count
Owner
State
State Highway Agency

About this bridge

M-37 over Manistee River is a prestressed concrete stringer/multi-beam or girder carrying M-37 over Manistee River in Wexford County, Michigan. It was built in 1934 and reconstructed in 1994, so it is 91 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 5,896 vehicles a day, roughly 9% of them trucks, projected to reach 8,175 by 2018. The structure is 119 ft (36.2 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesM-37
CrossesManistee River
Location0.9 MI N of Sherman
RouteState Highway 37
CountyWexford County
StateMichigan
Coordinates44.43626, -85.6984
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating79.3 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length119 ft (36.2 m)
Longest span58 ft (17.6 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,896 (2007)
Projected traffic8,175 by 2018
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-37 over Manistee River built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1994.

What condition is M-37 over Manistee 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 August 2024.

How much traffic does M-37 over Manistee River carry?

About 5,896 vehicles per day (2007 count), of which roughly 9% are trucks.

How long is M-37 over Manistee River?

The structure is 119 ft (36.2 m) long with a longest span of 58 ft (17.6 m) and a deck 41 ft wide.

Who owns M-37 over Manistee River?

It is owned by the State Highway Agency.