US Bridges

M-60 & US-131 Br over Rocky River

Fair

St. Joseph County, Michigan · In Three Rivers · Structure no. 000000000010270

Built
1966
59 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
9,299
2007 count
Owner
State
State Highway Agency

About this bridge

M-60 & US-131 Br over Rocky River is a steel stringer/multi-beam or girder carrying M-60 & US-131 Br over Rocky River in St. Joseph County, Michigan. It was built in 1966, so it is 59 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 9,299 vehicles a day, roughly 6% of them trucks, projected to reach 14,893 by 2018. The structure is 46 ft (14 m) long and 62 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-60 & US-131 Br
CrossesRocky River
LocationIn Three Rivers
RouteState Highway 60
CountySt. Joseph County
StateMichigan
Coordinates41.94309, -85.63466
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span46 ft (14 m)
Deck width62 ft (19 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,299 (2007)
Projected traffic14,893 by 2018
Trucks6%
Lanes on structure4
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 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 M-60 & US-131 Br over Rocky River built?

It was built in 1966, making it 59 years old in 2025.

What condition is M-60 & US-131 Br over Rocky 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 September 2023.

How much traffic does M-60 & US-131 Br over Rocky River carry?

About 9,299 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is M-60 & US-131 Br over Rocky River?

The structure is 46 ft (14 m) long with a longest span of 46 ft (14 m) and a deck 62 ft wide.

Who owns M-60 & US-131 Br over Rocky River?

It is owned by the State Highway Agency.