US Bridges

Petersburg RD over River Raisin

Good

Monroe County, Michigan · 0.3 MI N of Ida West RD · Structure no. 000000000007231

Built
1959
66 years old, rebuilt 2008
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
920
2006 count
Owner
County
County Highway Agency

About this bridge

Petersburg RD over River Raisin is a prestressed concrete box beam or girders - single or spread carrying Petersburg RD over River Raisin in Monroe County, Michigan. It was built in 1959 and reconstructed in 2008, so it is 66 years old, older 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 920 vehicles a day, roughly 5% of them trucks, projected to reach 1,350 by 2026. The structure is 180 ft (54.9 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesPetersburg RD
CrossesRiver Raisin
Location0.3 MI N of Ida West RD
RouteCounty Highway 5815
Coordinates41.90801, -83.70942
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating92.5 US tons
Inventory rating48.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length180 ft (54.9 m)
Longest span60 ft (18.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic920 (2006)
Projected traffic1,350 by 2026
Trucks5%
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 Petersburg RD over River Raisin built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2008.

What condition is Petersburg RD over River Raisin 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 July 2024.

How much traffic does Petersburg RD over River Raisin carry?

About 920 vehicles per day (2006 count), of which roughly 5% are trucks.

How long is Petersburg RD over River Raisin?

The structure is 180 ft (54.9 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.

Who owns Petersburg RD over River Raisin?

It is owned by the County Highway Agency.