US Bridges

South County Line over ST Joseph River

Fair

Calhoun County, Michigan · Clarendon Twp Sec 36 · Structure no. 000000000001294

Built
1964
61 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
2 main spans
Daily traffic
530
1995 count
Owner
County
County Highway Agency

About this bridge

South County Line over ST Joseph River is a prestressed concrete box beam or girders - multiple carrying South County Line over ST Joseph River in Calhoun County, Michigan. It was built in 1964, so it is 61 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 530 vehicles a day, roughly 12% of them trucks, projected to reach 948 by 2023. The structure is 80 ft (24.3 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesSouth County Line
CrossesST Joseph River
LocationClarendon Twp Sec 36
RouteCounty Highway 0
CountyCalhoun County
StateMichigan
Coordinates42.07246, -84.82882
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.2 US tons
Inventory rating33.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadH 20
Structure length80 ft (24.3 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (1995)
Projected traffic948 by 2023
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 South County Line over ST Joseph River built?

It was built in 1964, making it 61 years old in 2025.

What condition is South County Line 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 September 2023.

How much traffic does South County Line over ST Joseph River carry?

About 530 vehicles per day (1995 count), of which roughly 12% are trucks.

How long is South County Line over ST Joseph River?

The structure is 80 ft (24.3 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns South County Line over ST Joseph River?

It is owned by the County Highway Agency.