US Bridges

M-55 over Manistee River

Good

Manistee County, Michigan · 0.1 MI E of US-31 · Structure no. 000000000006439

Built
2021
4 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
421 ft
3 main spans
Daily traffic
3,408
2022 count
Owner
State
State Highway Agency

About this bridge

M-55 over Manistee River is a prestressed concrete stringer/multi-beam or girder carrying M-55 over Manistee River in Manistee County, Michigan. It was built in 2021, so it is 4 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 3,408 vehicles a day, roughly 16% of them trucks. The structure is 421 ft (128.3 m) long and 47 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesM-55
CrossesManistee River
Location0.1 MI E of US-31
RouteState Highway 55
CountyManistee County
StateMichigan
Coordinates44.26379, -86.29509
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length421 ft (128.3 m)
Longest span148 ft (45 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,408 (2022)
Projected traffic—
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was M-55 over Manistee River built?

It was built in 2021, making it 4 years old in 2025.

What condition is M-55 over Manistee 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 May 2024.

How much traffic does M-55 over Manistee River carry?

About 3,408 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is M-55 over Manistee River?

The structure is 421 ft (128.3 m) long with a longest span of 148 ft (45 m) and a deck 47 ft wide.

Who owns M-55 over Manistee River?

It is owned by the State Highway Agency.