US Bridges

Rambadt Road over Prairie River

FairPosted for load

St. Joseph County, Michigan · 2 MI E of Centreville · Structure no. 000000000010364

Built
1971
54 years old
Condition
Fair
inspected November 2023
Type
Slab
Wood or Timber
Length
75 ft
3 main spans
Daily traffic
333
2003 count
Owner
County
County Highway Agency

About this bridge

Rambadt Road over Prairie River is a wood or timber slab carrying Rambadt Road over Prairie River in St. Joseph County, Michigan. It was built in 1971, so it is 54 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. Its operating status is: posted for load restriction.

It carries about 333 vehicles a day, roughly 5% of them trucks, projected to reach 470 by 2023. The structure is 75 ft (22.9 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRambadt Road
CrossesPrairie River
Location2 MI E of Centreville
RouteCounty Highway 0
CountySt. Joseph County
StateMichigan
Coordinates41.92058, -85.48765
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 statusPosted for load 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length75 ft (22.9 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic333 (2003)
Projected traffic470 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 Rambadt Road over Prairie River built?

It was built in 1971, making it 54 years old in 2025.

What condition is Rambadt 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 Rambadt Road over Prairie River carry?

About 333 vehicles per day (2003 count), of which roughly 5% are trucks.

How long is Rambadt Road over Prairie River?

The structure is 75 ft (22.9 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns Rambadt Road over Prairie River?

It is owned by the County Highway Agency.