US Bridges

M-86 (s Main St) over ST Joseph River

Fair

St. Joseph County, Michigan · In Three Rivers · Structure no. 000000000010281

Built
2000
25 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
181 ft
3 main spans
Daily traffic
6,441
2007 count
Owner
State
State Highway Agency

About this bridge

M-86 (s Main St) over ST Joseph River is a prestressed concrete box beam or girders - multiple carrying M-86 (s Main St) over ST Joseph River in St. Joseph County, Michigan. It was built in 2000, so it is 25 years old, younger 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 6,441 vehicles a day, roughly 5% of them trucks, projected to reach 11,116 by 2018. The structure is 181 ft (55.3 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-86 (s Main St)
CrossesST Joseph River
LocationIn Three Rivers
RouteState Highway 86
CountySt. Joseph County
StateMichigan
Coordinates41.94301, -85.63188
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length181 ft (55.3 m)
Longest span60 ft (18.4 m)
Deck width60 ft (18.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,441 (2007)
Projected traffic11,116 by 2018
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-86 (s Main St) over ST Joseph River built?

It was built in 2000, making it 25 years old in 2025.

What condition is M-86 (s Main St) over ST Joseph 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 July 2023.

How much traffic does M-86 (s Main St) over ST Joseph River carry?

About 6,441 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is M-86 (s Main St) over ST Joseph River?

The structure is 181 ft (55.3 m) long with a longest span of 60 ft (18.4 m) and a deck 60 ft wide.

Who owns M-86 (s Main St) over ST Joseph River?

It is owned by the State Highway Agency.