US Bridges

Woodruff Road over Coldwater River

Good

Isabella County, Michigan · 0.4 M N SW Cor Sec 7 T15N · Structure no. 000000000004298

Built
2022
3 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
86 ft
1 main span
Daily traffic
1,237
2022 count
Owner
County
County Highway Agency

About this bridge

Woodruff Road over Coldwater River is a prestressed concrete stringer/multi-beam or girder carrying Woodruff Road over Coldwater River in Isabella County, Michigan. It was built in 2022, so it is 3 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 1,237 vehicles a day, roughly 4% of them trucks, projected to reach 1,367 by 2042. The structure is 86 ft (26.1 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesWoodruff Road
CrossesColdwater River
Location0.4 M N SW Cor Sec 7 T15N
RouteCounty Highway 3725
CountyIsabella County
StateMichigan
Coordinates43.70322, -84.96831
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating87.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length86 ft (26.1 m)
Longest span41 ft (12.5 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,237 (2022)
Projected traffic1,367 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$310,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Woodruff Road over Coldwater River built?

It was built in 2022, making it 3 years old in 2025.

What condition is Woodruff Road 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 July 2024.

How much traffic does Woodruff Road over Coldwater River carry?

About 1,237 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Woodruff Road over Coldwater River?

The structure is 86 ft (26.1 m) long with a longest span of 41 ft (12.5 m) and a deck 33 ft wide.

Who owns Woodruff Road over Coldwater River?

It is owned by the County Highway Agency.