US Bridges

Cove Road over Unnamed Creek

Fair

St. Clair County, Michigan · Sec. 17 Wales Twp. · Structure no. 000000000010088

Built
1921
104 years old, rebuilt 2023
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Steel
Length
26 ft
1 main span
Daily traffic
188
2001 count
Owner
County
County Highway Agency

About this bridge

Cove Road over Unnamed Creek is a steel box beam or girders - single or spread carrying Cove Road over Unnamed Creek in St. Clair County, Michigan. It was built in 1921 and reconstructed in 2023, so it is 104 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 6 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 188 vehicles a day, roughly 3% of them trucks, projected to reach 340 by 221. The structure is 26 ft (7.9 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCove Road
CrossesUnnamed Creek
LocationSec. 17 Wales Twp.
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates42.94671, -82.70884
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length26 ft (7.9 m)
Longest span22 ft (6.7 m)
Deck width27 ft (8.3 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic188 (2001)
Projected traffic340 by 221
Trucks3%
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 Cove Road over Unnamed Creek built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 2023.

What condition is Cove Road over Unnamed Creek 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 October 2023.

How much traffic does Cove Road over Unnamed Creek carry?

About 188 vehicles per day (2001 count), of which roughly 3% are trucks.

How long is Cove Road over Unnamed Creek?

The structure is 26 ft (7.9 m) long with a longest span of 22 ft (6.7 m) and a deck 27 ft wide.

Who owns Cove Road over Unnamed Creek?

It is owned by the County Highway Agency.