US Bridges

County Road P106B over Otter River

Good

Houghton County, Michigan · 1MI W 2.25 MI N Tapiola · Structure no. 000000000003431

Built
1985
40 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
50
1993 count
Owner
County
County Highway Agency

About this bridge

County Road P106B over Otter River is a prestressed concrete box beam or girders - multiple carrying County Road P106B over Otter River in Houghton County, Michigan. It was built in 1985, so it is 40 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 50 by 2013. The structure is 60 ft (18.2 m) long and 25 ft wide.

Location

Open in Google Maps
CarriesCounty Road P106B
CrossesOtter River
Location1MI W 2.25 MI N Tapiola
RouteCounty Highway 0
CountyHoughton County
StateMichigan
Coordinates46.95652, -88.64891
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length60 ft (18.2 m)
Longest span60 ft (18.2 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1993)
Projected traffic50 by 2013
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 P106B over Otter River built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road P106B over Otter 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 P106B over Otter River carry?

About 50 vehicles per day (1993 count).

How long is County Road P106B over Otter River?

The structure is 60 ft (18.2 m) long with a longest span of 60 ft (18.2 m) and a deck 25 ft wide.

Who owns County Road P106B over Otter River?

It is owned by the County Highway Agency.