US Bridges

Cronk Road over ST Joseph River

Good

Hillsdale County, Michigan · 0.3 MI S of Herring RD · Structure no. 000000000003342

Built
1987
38 years old
Condition
Good
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
130
2014 count
Owner
County
County Highway Agency

About this bridge

Cronk Road over ST Joseph River is a prestressed concrete box beam or girders - multiple carrying Cronk Road over ST Joseph River in Hillsdale County, Michigan. It was built in 1987, so it is 38 years old, younger 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 130 vehicles a day, projected to reach 213 by 2038. The structure is 60 ft (18.2 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCronk Road
CrossesST Joseph River
Location0.3 MI S of Herring RD
RouteCounty Highway 0
CountyHillsdale County
StateMichigan
Coordinates42.02313, -84.72902
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.8 US tons
Inventory rating35.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length60 ft (18.2 m)
Longest span58 ft (17.6 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2014)
Projected traffic213 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Cronk Road over ST Joseph River built?

It was built in 1987, making it 38 years old in 2025.

What condition is Cronk Road over ST Joseph River 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 November 2024.

How much traffic does Cronk Road over ST Joseph River carry?

About 130 vehicles per day (2014 count).

How long is Cronk Road over ST Joseph River?

The structure is 60 ft (18.2 m) long with a longest span of 58 ft (17.6 m) and a deck 31 ft wide.

Who owns Cronk Road over ST Joseph River?

It is owned by the County Highway Agency.