US Bridges

Main Street over Kalamazoo River Mill Br

Fair

Allegan County, Michigan · In Plainwell · Structure no. 000000000000324

Built
1975
50 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
59 ft
3 main spans
Daily traffic
1,133
2003 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main Street over Kalamazoo River Mill Br is a steel culvert carrying Main Street over Kalamazoo River Mill Br in Allegan County, Michigan. It was built in 1975, so it is 50 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 1,133 vehicles a day, projected to reach 1,800 by 2023. The structure is 59 ft (18 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMain Street
CrossesKalamazoo River Mill Br
LocationIn Plainwell
RouteCounty Highway 385
CountyAllegan County
StateMichigan
Coordinates42.43592, -85.64176
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating98.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadH 20
Structure length59 ft (18 m)
Longest span15 ft (4.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,133 (2003)
Projected traffic1,800 by 2023
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Main Street over Kalamazoo River Mill Br built?

It was built in 1975, making it 50 years old in 2025.

What condition is Main Street over Kalamazoo River Mill Br 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 August 2023.

How much traffic does Main Street over Kalamazoo River Mill Br carry?

About 1,133 vehicles per day (2003 count).

How long is Main Street over Kalamazoo River Mill Br?

The structure is 59 ft (18 m) long with a longest span of 15 ft (4.5 m).

Who owns Main Street over Kalamazoo River Mill Br?

It is owned by the City or Municipal Highway Agency.