US Bridges

County Road S10 over Traprock River

Good

Houghton County, Michigan · 1 MI E 2.1 MI N Lake Lind · Structure no. 000000000003436

Built
2000
25 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
240
2000 count
Owner
County
County Highway Agency

About this bridge

County Road S10 over Traprock River is a prestressed concrete box beam or girders - multiple carrying County Road S10 over Traprock River in Houghton County, Michigan. It was built in 2000, so it is 25 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 240 vehicles a day, projected to reach 280 by 2020. The structure is 55 ft (16.7 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road S10
CrossesTraprock River
Location1 MI E 2.1 MI N Lake Lind
RouteCounty Highway 0
CountyHoughton County
StateMichigan
Coordinates47.23046, -88.38347
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 rating72.5 US tons
Inventory rating43.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length55 ft (16.7 m)
Longest span50 ft (15.2 m)
Deck width31 ft (9.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2000)
Projected traffic280 by 2020
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 S10 over Traprock River built?

It was built in 2000, making it 25 years old in 2025.

What condition is County Road S10 over Traprock 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 S10 over Traprock River carry?

About 240 vehicles per day (2000 count).

How long is County Road S10 over Traprock River?

The structure is 55 ft (16.7 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.

Who owns County Road S10 over Traprock River?

It is owned by the County Highway Agency.