US Bridges

Vermontville HWY over Thornapple River

Good

Eaton County, Michigan · 2 MI W of Potterville · Structure no. 000000000002346

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
2,654
2020 count
Owner
County
County Highway Agency

About this bridge

Vermontville HWY over Thornapple River is a prestressed concrete box beam or girders - single or spread carrying Vermontville HWY over Thornapple River in Eaton County, Michigan. It was built in 2021, so it is 4 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 2,654 vehicles a day, roughly 2% of them trucks, projected to reach 3,131 by 2040. The structure is 54 ft (16.5 m) long and 37 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesVermontville HWY
CrossesThornapple River
Location2 MI W of Potterville
RouteCounty Highway 2360
CountyEaton County
StateMichigan
Coordinates42.62587, -84.77433
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 protection8 Very GoodNo problems noted.
Last inspectionMay 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating48.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length54 ft (16.5 m)
Longest span53 ft (16.1 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,654 (2020)
Projected traffic3,131 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Vermontville HWY over Thornapple River built?

It was built in 2021, making it 4 years old in 2025.

What condition is Vermontville HWY over Thornapple 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 May 2023.

How much traffic does Vermontville HWY over Thornapple River carry?

About 2,654 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Vermontville HWY over Thornapple River?

The structure is 54 ft (16.5 m) long with a longest span of 53 ft (16.1 m) and a deck 37 ft wide.

Who owns Vermontville HWY over Thornapple River?

It is owned by the County Highway Agency.