US Bridges

15 MI Road over Kalamazoo River

FairPosted for load

Calhoun County, Michigan · Marshall Twp Sec 34 · Structure no. 000000000001338

Built
1961
64 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
2 main spans
Daily traffic
2,500
2021 count
Owner
County
County Highway Agency

About this bridge

15 MI Road over Kalamazoo River is a prestressed concrete box beam or girders - multiple carrying 15 MI Road over Kalamazoo River in Calhoun County, Michigan. It was built in 1961, so it is 64 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. Its operating status is: posted for load restriction.

It carries about 2,500 vehicles a day, roughly 5% of them trucks, projected to reach 2,750 by 2041. The structure is 120 ft (36.5 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
Carries15 MI Road
CrossesKalamazoo River
LocationMarshall Twp Sec 34
RouteCounty Highway 1351
CountyCalhoun County
StateMichigan
Coordinates42.2585, -84.9982
Functional classRural Major Collector

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.5 US tons
Inventory rating33.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length120 ft (36.5 m)
Longest span60 ft (18.2 m)
Deck width32 ft (9.9 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2021)
Projected traffic2,750 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 15 MI Road over Kalamazoo River built?

It was built in 1961, making it 64 years old in 2025.

What condition is 15 MI Road 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 September 2024.

How much traffic does 15 MI Road over Kalamazoo River carry?

About 2,500 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is 15 MI Road over Kalamazoo River?

The structure is 120 ft (36.5 m) long with a longest span of 60 ft (18.2 m) and a deck 32 ft wide.

Who owns 15 MI Road over Kalamazoo River?

It is owned by the County Highway Agency.