US Bridges

M-89 over Kalamazoo River

Fair

Allegan County, Michigan · 1.4 MI W of Otsego · Structure no. 000000000000091

Built
1930
95 years old, rebuilt 1992
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
225 ft
3 main spans
Daily traffic
11,469
2007 count
Owner
State
State Highway Agency

About this bridge

M-89 over Kalamazoo River is a prestressed concrete stringer/multi-beam or girder carrying M-89 over Kalamazoo River in Allegan County, Michigan. It was built in 1930 and reconstructed in 1992, so it is 95 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 11,469 vehicles a day, roughly 12% of them trucks, projected to reach 15,713 by 2018. The structure is 225 ft (68.6 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-89
CrossesKalamazoo River
Location1.4 MI W of Otsego
RouteState Highway 89
CountyAllegan County
StateMichigan
Coordinates42.46003, -85.72214
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
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.7 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length225 ft (68.6 m)
Longest span75 ft (22.9 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,469 (2007)
Projected traffic15,713 by 2018
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$84,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-89 over Kalamazoo River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1992.

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 11,469 vehicles per day (2007 count), of which roughly 12% are trucks.

How long is M-89 over Kalamazoo River?

The structure is 225 ft (68.6 m) long with a longest span of 75 ft (22.9 m) and a deck 47 ft wide.

Who owns M-89 over Kalamazoo River?

It is owned by the State Highway Agency.