US Bridges

Mackinaw Trail HWY over US-131 NB|M-55 EB

Fair

Wexford County, Michigan · 1.8 MI S of Cadillac · Structure no. 000000000012543

Built
1966
59 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
378 ft
4 main spans
Daily traffic
12,310
2007 count
Owner
State
State Highway Agency

About this bridge

Mackinaw Trail HWY over US-131 NB|M-55 EB is a steel stringer/multi-beam or girder carrying Mackinaw Trail HWY over US-131 NB|M-55 EB in Wexford County, Michigan. It was built in 1966, so it is 59 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 12,310 vehicles a day, roughly 8% of them trucks, projected to reach 13,229 by 2018. The structure is 378 ft (115.1 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMackinaw Trail HWY
CrossesUS-131 NB|M-55 EB
Location1.8 MI S of Cadillac
RouteCounty Highway 0
CountyWexford County
StateMichigan
Coordinates44.21062, -85.40587
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating83.2 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length378 ft (115.1 m)
Longest span103 ft (31.5 m)
Deck width36 ft (11.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,310 (2007)
Projected traffic13,229 by 2018
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mackinaw Trail HWY over US-131 NB|M-55 EB built?

It was built in 1966, making it 59 years old in 2025.

What condition is Mackinaw Trail HWY over US-131 NB|M-55 EB 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 October 2024.

How much traffic does Mackinaw Trail HWY over US-131 NB|M-55 EB carry?

About 12,310 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is Mackinaw Trail HWY over US-131 NB|M-55 EB?

The structure is 378 ft (115.1 m) long with a longest span of 103 ft (31.5 m) and a deck 36 ft wide.

Who owns Mackinaw Trail HWY over US-131 NB|M-55 EB?

It is owned by the State Highway Agency.