US Bridges

M-89 over Kalamazoo River

Fair

Allegan County, Michigan · In the City of Allegan · Structure no. 000000000000089

Built
1943
82 years old, rebuilt 1947
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
270 ft
6 main spans
Daily traffic
12,100
2013 count
Owner
State
State Highway Agency

About this bridge

M-89 over Kalamazoo River is a steel stringer/multi-beam or girder carrying M-89 over Kalamazoo River in Allegan County, Michigan. It was built in 1943 and reconstructed in 1947, so it is 82 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 12,100 vehicles a day, roughly 5% of them trucks, projected to reach 16,800 by 2029. The structure is 270 ft (82.3 m) long and 57 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-89
CrossesKalamazoo River
LocationIn the City of Allegan
RouteState Highway 89
CountyAllegan County
StateMichigan
Coordinates42.52555, -85.8507
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length270 ft (82.3 m)
Longest span44 ft (13.4 m)
Deck width57 ft (17.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,100 (2013)
Projected traffic16,800 by 2029
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 M-89 over Kalamazoo River built?

It was built in 1943, making it 82 years old in 2025. It was reconstructed in 1947.

What condition is M-89 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 M-89 over Kalamazoo River carry?

About 12,100 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is M-89 over Kalamazoo River?

The structure is 270 ft (82.3 m) long with a longest span of 44 ft (13.4 m) and a deck 57 ft wide.

Who owns M-89 over Kalamazoo River?

It is owned by the State Highway Agency.