US Bridges

Boyer Road over Prairie Creek

Fair

Montcalm County, Michigan · 4.4 Miles E of M-66 · Structure no. 000000000007487

Built
1920
105 years old, rebuilt 1987
Condition
Fair
inspected March 2023
Type
Slab
Wood or Timber
Length
28 ft
1 main span
Daily traffic
237
2003 count
Owner
County
County Highway Agency

About this bridge

Boyer Road over Prairie Creek is a wood or timber slab carrying Boyer Road over Prairie Creek in Montcalm County, Michigan. It was built in 1920 and reconstructed in 1987, so it is 105 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 237 vehicles a day, projected to reach 326 by 2023. The structure is 28 ft (8.5 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBoyer Road
CrossesPrairie Creek
Location4.4 Miles E of M-66
RouteCounty Highway 0
CountyMontcalm County
StateMichigan
Coordinates43.16299, -84.98837
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating37.7 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic237 (2003)
Projected traffic326 by 2023
Trucks0%
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 Boyer Road over Prairie Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1987.

What condition is Boyer Road over Prairie Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Boyer Road over Prairie Creek carry?

About 237 vehicles per day (2003 count).

How long is Boyer Road over Prairie Creek?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns Boyer Road over Prairie Creek?

It is owned by the County Highway Agency.