US Bridges

M-55 over Pine River

Fair

Manistee County, Michigan · 4.2 MI W of Wexford Col · Structure no. 000000000006441

Built
1934
91 years old, rebuilt 1989
Condition
Fair
inspected June 2024
Type
Truss - Deck
Steel
Length
614 ft
3 main spans
Daily traffic
3,175
2018 count
Owner
State
State Highway Agency

About this bridge

M-55 over Pine River is a steel truss - deck carrying M-55 over Pine River in Manistee County, Michigan. It was built in 1934 and reconstructed in 1989, 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 5 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 3,175 vehicles a day, roughly 10% of them trucks, projected to reach 3,500 by 2038. The structure is 614 ft (187.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-55
CrossesPine River
Location4.2 MI W of Wexford Col
RouteState Highway 55
CountyManistee County
StateMichigan
Coordinates44.22302, -85.90409
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 15 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72.5 US tons
Inventory rating43.5 US tons

Structure

Structure typeTruss - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadH 15
Structure length614 ft (187.1 m)
Longest span300 ft (91.4 m)
Deck width44 ft (13.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,175 (2018)
Projected traffic3,500 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-55 over Pine River built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1989.

What condition is M-55 over Pine 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 June 2024.

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

About 3,175 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is M-55 over Pine River?

The structure is 614 ft (187.1 m) long with a longest span of 300 ft (91.4 m) and a deck 44 ft wide.

Who owns M-55 over Pine River?

It is owned by the State Highway Agency.