US Bridges

County Road P108 over N Branch of Otter Riv

Good

Houghton County, Michigan · 2 MI W 1 MI S of Tapiola · Structure no. 000000000003432

Built
1994
31 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
88 ft
3 main spans
Daily traffic
80
1994 count
Owner
County
County Highway Agency

About this bridge

County Road P108 over N Branch of Otter Riv is a prestressed concrete box beam or girders - multiple carrying County Road P108 over N Branch of Otter Riv in Houghton County, Michigan. It was built in 1994, so it is 31 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 80 vehicles a day, projected to reach 120 by 2013. The structure is 88 ft (26.8 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesCounty Road P108
CrossesN Branch of Otter Riv
Location2 MI W 1 MI S of Tapiola
RouteCounty Highway 0
CountyHoughton County
StateMichigan
Coordinates46.91001, -88.67001
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85.3 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length88 ft (26.8 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (1994)
Projected traffic120 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 P108 over N Branch of Otter Riv built?

It was built in 1994, making it 31 years old in 2025.

What condition is County Road P108 over N Branch of Otter Riv 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 P108 over N Branch of Otter Riv carry?

About 80 vehicles per day (1994 count).

How long is County Road P108 over N Branch of Otter Riv?

The structure is 88 ft (26.8 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns County Road P108 over N Branch of Otter Riv?

It is owned by the County Highway Agency.