US Bridges

Coldwater Road over South Br Chippewa River

GoodPosted for load

Isabella County, Michigan · 0.2 M S NE Cor Sec 35 T15 · Structure no. 000000000004297

Built
1958
67 years old
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
3,870
2013 count
Owner
County
County Highway Agency

About this bridge

Coldwater Road over South Br Chippewa River is a prestressed concrete box beam or girders - multiple carrying Coldwater Road over South Br Chippewa River in Isabella County, Michigan. It was built in 1958, so it is 67 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 3,870 vehicles a day, roughly 3% of them trucks, projected to reach 5,750 by 2033. The structure is 55 ft (16.7 m) long and 28 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesColdwater Road
CrossesSouth Br Chippewa River
Location0.2 M S NE Cor Sec 35 T15
RouteCounty Highway 3721
Coordinates43.65181, -84.98765
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.5 US tons
Inventory rating28.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length55 ft (16.7 m)
Longest span50 ft (15.2 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,870 (2013)
Projected traffic5,750 by 2033
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Coldwater Road over South Br Chippewa River built?

It was built in 1958, making it 67 years old in 2025.

What condition is Coldwater Road over South Br Chippewa 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 April 2024.

How much traffic does Coldwater Road over South Br Chippewa River carry?

About 3,870 vehicles per day (2013 count), of which roughly 3% are trucks.

How long is Coldwater Road over South Br Chippewa River?

The structure is 55 ft (16.7 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns Coldwater Road over South Br Chippewa River?

It is owned by the County Highway Agency.