US Bridges

Filmore Road over Prairie River

Fair

St. Joseph County, Michigan · 4 MI E of Centreville · Structure no. 000000000010368

Built
1970
55 years old
Condition
Fair
inspected November 2023
Type
Slab
Wood or Timber
Length
66 ft
3 main spans
Daily traffic
233
2003 count
Owner
County
County Highway Agency

About this bridge

Filmore Road over Prairie River is a wood or timber slab carrying Filmore Road over Prairie River in St. Joseph County, Michigan. It was built in 1970, so it is 55 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 5 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 233 vehicles a day, roughly 5% of them trucks, projected to reach 344 by 2023. The structure is 66 ft (20.1 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFilmore Road
CrossesPrairie River
Location4 MI E of Centreville
RouteCounty Highway 0
CountySt. Joseph County
StateMichigan
Coordinates41.9148, -85.43792
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating55.7 US tons
Inventory rating40.2 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length66 ft (20.1 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic233 (2003)
Projected traffic344 by 2023
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Filmore Road over Prairie River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Filmore Road over Prairie River 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 November 2023.

How much traffic does Filmore Road over Prairie River carry?

About 233 vehicles per day (2003 count), of which roughly 5% are trucks.

How long is Filmore Road over Prairie River?

The structure is 66 ft (20.1 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns Filmore Road over Prairie River?

It is owned by the County Highway Agency.