US Bridges

County Road 161 over East Br Ontonagon River

Good

Houghton County, Michigan · 4.5 MI E 1.0 MI S Kenton · Structure no. 000000000003409

Built
1987
38 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
42 ft
1 main span
Daily traffic
50
1993 count
Owner
County
County Highway Agency

About this bridge

County Road 161 over East Br Ontonagon River is a concrete culvert carrying County Road 161 over East Br Ontonagon River in Houghton County, Michigan. It was built in 1987, so it is 38 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 50 vehicles a day, projected to reach 60 by 2013. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesCounty Road 161
CrossesEast Br Ontonagon River
Location4.5 MI E 1.0 MI S Kenton
RouteCounty Highway 0
CountyHoughton County
StateMichigan
Coordinates46.47062, -88.79995
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1993)
Projected traffic60 by 2013
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 County Road 161 over East Br Ontonagon River built?

It was built in 1987, making it 38 years old in 2025.

What condition is County Road 161 over East 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 County Road 161 over East Br Ontonagon River carry?

About 50 vehicles per day (1993 count).

How long is County Road 161 over East Br Ontonagon River?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m).

Who owns County Road 161 over East Br Ontonagon River?

It is owned by the County Highway Agency.