US Bridges

Woodruff Road over Coldwater River

Good

Isabella County, Michigan · 0.2 M S NW Cor Sec 7 T15N · Structure no. 000000000004299

Built
2010
15 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
1,189
2010 count
Owner
County
County Highway Agency

About this bridge

Woodruff Road over Coldwater River is a prestressed concrete box beam or girders - multiple carrying Woodruff Road over Coldwater River in Isabella County, Michigan. It was built in 2010, so it is 15 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,189 vehicles a day, roughly 4% of them trucks, projected to reach 1,451 by 2030. The structure is 90 ft (27.4 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWoodruff Road
CrossesColdwater River
Location0.2 M S NW Cor Sec 7 T15N
RouteCounty Highway 3725
CountyIsabella County
StateMichigan
Coordinates43.71003, -84.96835
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.
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 evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating84 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span88 ft (26.9 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,189 (2010)
Projected traffic1,451 by 2030
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Woodruff Road over Coldwater River built?

It was built in 2010, making it 15 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 1,189 vehicles per day (2010 count), of which roughly 4% are trucks.

How long is Woodruff Road over Coldwater River?

The structure is 90 ft (27.4 m) long with a longest span of 88 ft (26.9 m) and a deck 34 ft wide.

Who owns Woodruff Road over Coldwater River?

It is owned by the County Highway Agency.