US Bridges

King Road over Belle River

Good

St. Clair County, Michigan · Sec. 23-24 China Twp. · Structure no. 000000000010109

Built
1984
41 years old, rebuilt 2023
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Single or Spread
Steel
Length
162 ft
3 main spans
Daily traffic
6,050
1994 count
Owner
County
County Highway Agency

About this bridge

King Road over Belle River is a steel box beam or girders - single or spread carrying King Road over Belle River in St. Clair County, Michigan. It was built in 1984 and reconstructed in 2023, so it is 41 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 6,050 vehicles a day, roughly 7% of them trucks, projected to reach 6,200 by 2014. The structure is 162 ft (49.3 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesKing Road
CrossesBelle River
LocationSec. 23-24 China Twp.
RouteCounty Highway 7777
CountySt. Clair County
StateMichigan
Coordinates42.76796, -82.51209
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating46.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length162 ft (49.3 m)
Longest span86 ft (26.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,050 (1994)
Projected traffic6,200 by 2014
Trucks7%
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 King Road over Belle River built?

It was built in 1984, making it 41 years old in 2025. It was reconstructed in 2023.

What condition is King 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 November 2023.

How much traffic does King Road over Belle River carry?

About 6,050 vehicles per day (1994 count), of which roughly 7% are trucks.

How long is King Road over Belle River?

The structure is 162 ft (49.3 m) long with a longest span of 86 ft (26.2 m) and a deck 43 ft wide.

Who owns King Road over Belle River?

It is owned by the County Highway Agency.