US Bridges

Irwin Road over East Branch Coon Creek

Good

Macomb County, Michigan · 0.1 MI West of North Ave · Structure no. 000000000006292

Built
2007
18 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
300
2006 count
Owner
County
County Highway Agency

About this bridge

Irwin Road over East Branch Coon Creek is a prestressed concrete box beam or girders - multiple carrying Irwin Road over East Branch Coon Creek in Macomb County, Michigan. It was built in 2007, so it is 18 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 300 vehicles a day, roughly 2% of them trucks, projected to reach 492 by 2026. The structure is 40 ft (12.2 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIrwin Road
CrossesEast Branch Coon Creek
Location0.1 MI West of North Ave
RouteCounty Highway 0
Coordinates42.86489, -82.88704
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating42.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.8 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2006)
Projected traffic492 by 2026
Trucks2%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Irwin Road over East Branch Coon Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Irwin Road over East Branch Coon Creek 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 August 2023.

How much traffic does Irwin Road over East Branch Coon Creek carry?

About 300 vehicles per day (2006 count), of which roughly 2% are trucks.

How long is Irwin Road over East Branch Coon Creek?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.8 m) and a deck 44 ft wide.

Who owns Irwin Road over East Branch Coon Creek?

It is owned by the County Highway Agency.