US Bridges

County Road D162 over Stony River

FairPosted for load

Houghton County, Michigan · 4.5 MI S 3.5 MI E Kenton · Structure no. 000000000003426

Built
1954
71 years old
Condition
Fair
inspected October 2023
Type
Other
Wood or Timber
Length
21 ft
1 main span
Daily traffic
50
1993 count
Owner
County
County Highway Agency

About this bridge

County Road D162 over Stony River is a wood or timber other carrying County Road D162 over Stony River in Houghton County, Michigan. It was built in 1954, so it is 71 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 60 by 2013. The structure is 21 ft (6.4 m) long and 15 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesCounty Road D162
CrossesStony River
Location4.5 MI S 3.5 MI E Kenton
RouteCounty Highway 0
CountyHoughton County
StateMichigan
Coordinates46.42294, -88.81732
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating35.4 US tons
Inventory rating21.1 US tons

Structure

Structure typeOther
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span20 ft (6.1 m)
Deck width15 ft (4.5 m)
Roadway width14 ft (4.3 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 closed16.8 mi (27 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$250,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road D162 over Stony River built?

It was built in 1954, making it 71 years old in 2025.

What condition is County Road D162 over Stony River 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 County Road D162 over Stony River carry?

About 50 vehicles per day (1993 count).

How long is County Road D162 over Stony River?

The structure is 21 ft (6.4 m) long with a longest span of 20 ft (6.1 m) and a deck 15 ft wide.

Who owns County Road D162 over Stony River?

It is owned by the County Highway Agency.