US Bridges

31 Mile Road over Coon Creek

Fair

Macomb County, Michigan · 200 Ft East of North Ave · Structure no. 000000000006382

Built
1977
48 years old
Condition
Fair
inspected April 2024
Type
Culvert
Steel
Length
37 ft
3 main spans
Daily traffic
250
2009 count
Owner
County
County Highway Agency

About this bridge

31 Mile Road over Coon Creek is a steel culvert carrying 31 Mile Road over Coon Creek in Macomb County, Michigan. It was built in 1977, so it is 48 years old, younger 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 250 vehicles a day, roughly 2% of them trucks, projected to reach 371 by 2029. The structure is 37 ft (11.2 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries31 Mile Road
CrossesCoon Creek
Location200 Ft East of North Ave
RouteCounty Highway 0
CountyMacomb County
StateMichigan
Coordinates42.79127, -82.88212
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadH 20
Structure length37 ft (11.2 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2009)
Projected traffic371 by 2029
Trucks2%
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 31 Mile Road over Coon Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is 31 Mile Road over Coon 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 April 2024.

How much traffic does 31 Mile Road over Coon Creek carry?

About 250 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is 31 Mile Road over Coon Creek?

The structure is 37 ft (11.2 m) long with a longest span of 12 ft (3.6 m).

Who owns 31 Mile Road over Coon Creek?

It is owned by the County Highway Agency.