US Bridges

M-55 over US-127

Fair

Roscommon County, Michigan · @ M-55 · Structure no. 000000000009003

Built
1961
64 years old, rebuilt 2008
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
228 ft
4 main spans
Daily traffic
6,032
2007 count
Owner
State
State Highway Agency

About this bridge

M-55 over US-127 is a steel stringer/multi-beam or girder carrying M-55 over US-127 in Roscommon County, Michigan. It was built in 1961 and reconstructed in 2008, so it is 64 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 6,032 vehicles a day, roughly 6% of them trucks, projected to reach 8,250 by 2028. The structure is 228 ft (69.6 m) long and 57 ft wide.

Location

Open in Google Maps
CarriesM-55
CrossesUS-127
Location@ M-55
RouteState Highway 55
CountyRoscommon County
StateMichigan
Coordinates44.33584, -84.8072
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86.1 US tons
Inventory rating51.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length228 ft (69.6 m)
Longest span80 ft (24.4 m)
Deck width57 ft (17.3 m)
Roadway width53 ft (16.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,032 (2007)
Projected traffic8,250 by 2028
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-55 over US-127 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2008.

What condition is M-55 over US-127 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 2023.

How much traffic does M-55 over US-127 carry?

About 6,032 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is M-55 over US-127?

The structure is 228 ft (69.6 m) long with a longest span of 80 ft (24.4 m) and a deck 57 ft wide.

Who owns M-55 over US-127?

It is owned by the State Highway Agency.