US Bridges

M-43 over Coldwater River

Good

Barry County, Michigan · 6.2 MI W of Woodland · Structure no. 000000000000529

Built
2024
1 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
183 ft
1 main span
Daily traffic
2,375
2024 count
Owner
State
State Highway Agency

About this bridge

M-43 over Coldwater River is a prestressed concrete stringer/multi-beam or girder carrying M-43 over Coldwater River in Barry County, Michigan. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,375 vehicles a day, roughly 7% of them trucks, projected to reach 2,625 by 2044. The structure is 183 ft (55.7 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-43
CrossesColdwater River
Location6.2 MI W of Woodland
RouteState Highway 43
CountyBarry County
StateMichigan
Coordinates42.72657, -85.25546
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 6 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating76.8 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length183 ft (55.7 m)
Longest span167 ft (50.9 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,375 (2024)
Projected traffic2,625 by 2044
Trucks7%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$60,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-43 over Coldwater River built?

It was built in 2024, making it 1 years old in 2025.

What condition is M-43 over Coldwater 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 November 2024.

How much traffic does M-43 over Coldwater River carry?

About 2,375 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is M-43 over Coldwater River?

The structure is 183 ft (55.7 m) long with a longest span of 167 ft (50.9 m) and a deck 46 ft wide.

Who owns M-43 over Coldwater River?

It is owned by the State Highway Agency.