US Bridges

Gratiot Road over Belle River

Good

St. Clair County, Michigan · Sec. 32 Columbus Twp. · Structure no. 000000000010044

Built
2022
3 years old
Condition
Good
inspected June 2023
Type
Truss - Thru
Steel
Length
185 ft
1 main span
Daily traffic
7,075
2022 count
Owner
County
County Highway Agency

About this bridge

Gratiot Road over Belle River is a steel truss - thru carrying Gratiot Road over Belle River in St. Clair County, Michigan. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,075 vehicles a day, roughly 8% of them trucks, projected to reach 11,315 by 2042. The structure is 185 ft (56.4 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGratiot Road
CrossesBelle River
LocationSec. 32 Columbus Twp.
RouteCounty Highway 7746
CountySt. Clair County
StateMichigan
Coordinates42.8245, -82.69854
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length185 ft (56.4 m)
Longest span180 ft (54.9 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,075 (2022)
Projected traffic11,315 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$470,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Gratiot Road over Belle River built?

It was built in 2022, making it 3 years old in 2025.

What condition is Gratiot Road over Belle 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 June 2023.

How much traffic does Gratiot Road over Belle River carry?

About 7,075 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Gratiot Road over Belle River?

The structure is 185 ft (56.4 m) long with a longest span of 180 ft (54.9 m) and a deck 37 ft wide.

Who owns Gratiot Road over Belle River?

It is owned by the County Highway Agency.