US Bridges

US-131 NB over M-115

Fair

Wexford County, Michigan · 2.2 MI S of Cadillac · Structure no. 000000000012544

Built
1966
59 years old, rebuilt 2024
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
3 main spans
Daily traffic
7,941
2021 count
Owner
State
State Highway Agency

About this bridge

US-131 NB over M-115 is a steel stringer/multi-beam or girder carrying US-131 NB over M-115 in Wexford County, Michigan. It was built in 1966 and reconstructed in 2024, 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 7,941 vehicles a day, roughly 11% of them trucks, projected to reach 8,325 by 2044. The structure is 135 ft (41.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS-131 NB
CrossesM-115
Location2.2 MI S of Cadillac
RouteU.S. Route 131
CountyWexford County
StateMichigan
Coordinates44.20534, -85.4121
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
Deck9 ExcellentNo problems noted.
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 geometry7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating100.8 US tons
Inventory rating60.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length135 ft (41.3 m)
Longest span73 ft (22.3 m)
Deck width42 ft (12.9 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,941 (2021)
Projected traffic8,325 by 2044
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 US-131 NB over M-115 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2024.

What condition is US-131 NB over M-115 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 US-131 NB over M-115 carry?

About 7,941 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is US-131 NB over M-115?

The structure is 135 ft (41.3 m) long with a longest span of 73 ft (22.3 m) and a deck 42 ft wide.

Who owns US-131 NB over M-115?

It is owned by the State Highway Agency.