US Bridges

I-69 SB over Kalamazoo River

Fair

Calhoun County, Michigan · 2.6 MI S of I-94 · Structure no. 000000000001214

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
106 ft
2 main spans
Daily traffic
10,679
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 SB over Kalamazoo River is a prestressed concrete stringer/multi-beam or girder carrying I-69 SB over Kalamazoo River in Calhoun County, Michigan. It was built in 1968, so it is 57 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 10,679 vehicles a day, roughly 34% of them trucks, projected to reach 25,600 by 2027. The structure is 106 ft (32.3 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-69 SB
CrossesKalamazoo River
Location2.6 MI S of I-94
RouteInterstate 69
CountyCalhoun County
StateMichigan
Coordinates42.26194, -84.98844
Functional classUrban Principal Arterial - Interstate

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length106 ft (32.3 m)
Longest span53 ft (16.2 m)
Deck width43 ft (13 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,679 (2007)
Projected traffic25,600 by 2027
Trucks34%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-69 SB over Kalamazoo River built?

It was built in 1968, making it 57 years old in 2025.

What condition is I-69 SB 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 I-69 SB over Kalamazoo River carry?

About 10,679 vehicles per day (2007 count), of which roughly 34% are trucks.

How long is I-69 SB over Kalamazoo River?

The structure is 106 ft (32.3 m) long with a longest span of 53 ft (16.2 m) and a deck 43 ft wide.

Who owns I-69 SB over Kalamazoo River?

It is owned by the State Highway Agency.