US Bridges

M-179 (129th Ave) over US-131

Good

Allegan County, Michigan · 6.0 MI N of M-222 · Structure no. 000000000000161

Built
2022
3 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
142 ft
2 main spans
Daily traffic
4,562
2018 count
Owner
State
State Highway Agency

About this bridge

M-179 (129th Ave) over US-131 is a prestressed concrete stringer/multi-beam or girder carrying M-179 (129th Ave) over US-131 in Allegan County, Michigan. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,562 vehicles a day, roughly 17% of them trucks, projected to reach 5,091 by 2040. The structure is 142 ft (43.3 m) long and 195 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesM-179 (129th Ave)
CrossesUS-131
Location6.0 MI N of M-222
RouteState Highway 179
CountyAllegan County
StateMichigan
Coordinates42.63038, -85.66216
Functional classRural Major Collector

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.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.9 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length142 ft (43.3 m)
Longest span69 ft (21.1 m)
Deck width195 ft (59.5 m)
Roadway width180 ft (55 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,562 (2018)
Projected traffic5,091 by 2040
Trucks17%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
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-179 (129th Ave) over US-131 built?

It was built in 2022, making it 3 years old in 2025.

What condition is M-179 (129th Ave) over US-131 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 June 2023.

How much traffic does M-179 (129th Ave) over US-131 carry?

About 4,562 vehicles per day (2018 count), of which roughly 17% are trucks.

How long is M-179 (129th Ave) over US-131?

The structure is 142 ft (43.3 m) long with a longest span of 69 ft (21.1 m) and a deck 195 ft wide.

Who owns M-179 (129th Ave) over US-131?

It is owned by the State Highway Agency.