US Bridges

28.5 Mile Road over S Branch Kalamazoo River

Good

Calhoun County, Michigan · 3 1/2 MI E of Homer · Structure no. 000000000001364

Built
2018
7 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
117
2018 count
Owner
County
County Highway Agency

About this bridge

28.5 Mile Road over S Branch Kalamazoo River is a prestressed concrete box beam or girders - multiple carrying 28.5 Mile Road over S Branch Kalamazoo River in Calhoun County, Michigan. It was built in 2018, so it is 7 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 117 vehicles a day, roughly 2% of them trucks, projected to reach 173 by 2038. The structure is 52 ft (15.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries28.5 Mile Road
CrossesS Branch Kalamazoo River
Location3 1/2 MI E of Homer
RouteCounty Highway 0
Coordinates42.13759, -84.74392
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 20 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.6 US tons
Inventory rating68.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length52 ft (15.8 m)
Longest span51 ft (15.5 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117 (2018)
Projected traffic173 by 2038
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$268,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 28.5 Mile Road over S Branch Kalamazoo River built?

It was built in 2018, making it 7 years old in 2025.

What condition is 28.5 Mile Road over S Branch Kalamazoo River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does 28.5 Mile Road over S Branch Kalamazoo River carry?

About 117 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is 28.5 Mile Road over S Branch Kalamazoo River?

The structure is 52 ft (15.8 m) long with a longest span of 51 ft (15.5 m) and a deck 32 ft wide.

Who owns 28.5 Mile Road over S Branch Kalamazoo River?

It is owned by the County Highway Agency.