US Bridges

Moyer Road over Thornapple River

Good

Eaton County, Michigan · 2 MI N of Gresham · Structure no. 000000000002391

Built
1984
41 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
51
2011 count
Owner
County
County Highway Agency

About this bridge

Moyer Road over Thornapple River is a prestressed concrete box beam or girders - multiple carrying Moyer Road over Thornapple River in Eaton County, Michigan. It was built in 1984, so it is 41 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 51 vehicles a day, projected to reach 120 by 2013. The structure is 65 ft (19.8 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMoyer Road
CrossesThornapple River
Location2 MI N of Gresham
RouteCounty Highway 0
CountyEaton County
StateMichigan
Coordinates42.66294, -84.88586
Functional classRural Local

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.
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 above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span63 ft (19.2 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2011)
Projected traffic120 by 2013
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Moyer Road over Thornapple River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Moyer Road 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 Moyer Road over Thornapple River carry?

About 51 vehicles per day (2011 count).

How long is Moyer Road over Thornapple River?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 30 ft wide.

Who owns Moyer Road over Thornapple River?

It is owned by the County Highway Agency.