US Bridges

Mcrae Road over S Br Ontonagon River

Good

Ontonagon County, Michigan · 0.5 MI S of Ewen · Structure no. 000000000008531

Built
1988
37 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
180
1997 count
Owner
County
County Highway Agency

About this bridge

Mcrae Road over S Br Ontonagon River is a prestressed concrete box beam or girders - multiple carrying Mcrae Road over S Br Ontonagon River in Ontonagon County, Michigan. It was built in 1988, so it is 37 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 180 vehicles a day, projected to reach 180 by 2017. The structure is 180 ft (54.8 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMcrae Road
CrossesS Br Ontonagon River
Location0.5 MI S of Ewen
RouteCounty Highway 0
CountyOntonagon County
StateMichigan
Coordinates46.5292, -89.27939
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating40.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length180 ft (54.8 m)
Longest span60 ft (18.2 m)
Deck width28 ft (8.6 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (1997)
Projected traffic180 by 2017
Trucks0%
Lanes on structure2
Traffic directionTwo-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 Mcrae Road over S Br Ontonagon River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Mcrae Road over S Br Ontonagon 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 October 2023.

How much traffic does Mcrae Road over S Br Ontonagon River carry?

About 180 vehicles per day (1997 count).

How long is Mcrae Road over S Br Ontonagon River?

The structure is 180 ft (54.8 m) long with a longest span of 60 ft (18.2 m) and a deck 28 ft wide.

Who owns Mcrae Road over S Br Ontonagon River?

It is owned by the County Highway Agency.