US Bridges

12 Mile Road over Kalamazoo River

Fair

Calhoun County, Michigan · Emmett Twp Sec 25 · Structure no. 000000000001323

Built
1925
100 years old
Condition
Fair
inspected September 2023
Type
Arch - Deck
Concrete
Length
115 ft
2 main spans
Daily traffic
968
1995 count
Owner
County
County Highway Agency

About this bridge

12 Mile Road over Kalamazoo River is a concrete arch - deck carrying 12 Mile Road over Kalamazoo River in Calhoun County, Michigan. It was built in 1925, so it is 100 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 968 vehicles a day, roughly 12% of them trucks, projected to reach 1,732 by 2023. The structure is 115 ft (35 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
Carries12 Mile Road
CrossesKalamazoo River
LocationEmmett Twp Sec 25
RouteCounty Highway 0
CountyCalhoun County
StateMichigan
Coordinates42.26994, -85.06149
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 alignment8: Equal to present desirable criteria
Operating rating56.5 US tons
Inventory rating33.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length115 ft (35 m)
Longest span58 ft (17.6 m)
Deck width24 ft (7.4 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic968 (1995)
Projected traffic1,732 by 2023
Trucks12%
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 statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 12 Mile Road over Kalamazoo River built?

It was built in 1925, making it 100 years old in 2025.

What condition is 12 Mile 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 2023.

How much traffic does 12 Mile Road over Kalamazoo River carry?

About 968 vehicles per day (1995 count), of which roughly 12% are trucks.

How long is 12 Mile Road over Kalamazoo River?

The structure is 115 ft (35 m) long with a longest span of 58 ft (17.6 m) and a deck 24 ft wide.

Who owns 12 Mile Road over Kalamazoo River?

It is owned by the County Highway Agency.