US Bridges

US-131 NB over Kalamazoo River

Fair

Allegan County, Michigan · 0.5 MI N of Plainwell · Structure no. 000000000000142

Built
1996
29 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
400 ft
3 main spans
Daily traffic
27,941
2012 count
Owner
State
State Highway Agency

About this bridge

US-131 NB over Kalamazoo River is a prestressed concrete stringer/multi-beam or girder carrying US-131 NB over Kalamazoo River in Allegan County, Michigan. It was built in 1996, so it is 29 years old, younger 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 27,941 vehicles a day, roughly 10% of them trucks, projected to reach 20,007 by 2018. The structure is 400 ft (121.9 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS-131 NB
CrossesKalamazoo River
Location0.5 MI N of Plainwell
RouteU.S. Route 131
Coordinates42.45491, -85.65346
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.9 US tons
Inventory rating38.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length400 ft (121.9 m)
Longest span132 ft (40.2 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,941 (2012)
Projected traffic20,007 by 2018
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-131 NB over Kalamazoo River built?

It was built in 1996, making it 29 years old in 2025.

What condition is US-131 NB over Kalamazoo 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 July 2023.

How much traffic does US-131 NB over Kalamazoo River carry?

About 27,941 vehicles per day (2012 count), of which roughly 10% are trucks.

How long is US-131 NB over Kalamazoo River?

The structure is 400 ft (121.9 m) long with a longest span of 132 ft (40.2 m) and a deck 59 ft wide.

Who owns US-131 NB over Kalamazoo River?

It is owned by the State Highway Agency.