US Bridges

ST Clair Road over Maple River

Good

Clinton County, Michigan · 0.1 MI N of Maple Riv RD · Structure no. 000000000001973

Built
2014
11 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
117
2013 count
Owner
County
County Highway Agency

About this bridge

ST Clair Road over Maple River is a prestressed concrete box beam or girders - multiple carrying ST Clair Road over Maple River in Clinton County, Michigan. It was built in 2014, so it is 11 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 117 vehicles a day, projected to reach 117 by 2033. The structure is 85 ft (25.9 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesST Clair Road
CrossesMaple River
Location0.1 MI N of Maple Riv RD
RouteCounty Highway 0
CountyClinton County
StateMichigan
Coordinates43.05552, -84.44643
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length85 ft (25.9 m)
Longest span82 ft (25.1 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117 (2013)
Projected traffic117 by 2033
Trucks0%
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 ST Clair Road over Maple River built?

It was built in 2014, making it 11 years old in 2025.

What condition is ST Clair Road over Maple 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 October 2024.

How much traffic does ST Clair Road over Maple River carry?

About 117 vehicles per day (2013 count).

How long is ST Clair Road over Maple River?

The structure is 85 ft (25.9 m) long with a longest span of 82 ft (25.1 m) and a deck 25 ft wide.

Who owns ST Clair Road over Maple River?

It is owned by the County Highway Agency.