US Bridges

Lincoln School Rd. over Traprock River

Good

Houghton County, Michigan · 1 MI S 1 MI E Copper City · Structure no. 000000000003423

Built
2007
18 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
100
2006 count
Owner
County
County Highway Agency

About this bridge

Lincoln School Rd. over Traprock River is a prestressed concrete box beam or girders - multiple carrying Lincoln School Rd. over Traprock River in Houghton County, Michigan. It was built in 2007, so it is 18 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 100 vehicles a day, roughly 2% of them trucks, projected to reach 150 by 2026. The structure is 55 ft (16.8 m) long and 31 ft wide.

CarriesLincoln School Rd.
CrossesTraprock River
Location1 MI S 1 MI E Copper City
RouteCounty Highway 0
Coordinates47.26881, -88.36217
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 within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72.5 US tons
Inventory rating43.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length55 ft (16.8 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 traffic100 (2006)
Projected traffic150 by 2026
Trucks2%
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 Lincoln School Rd. over Traprock River built?

It was built in 2007, making it 18 years old in 2025.

What condition is Lincoln School Rd. 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 Lincoln School Rd. over Traprock River carry?

About 100 vehicles per day (2006 count), of which roughly 2% are trucks.

How long is Lincoln School Rd. over Traprock River?

The structure is 55 ft (16.8 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.

Who owns Lincoln School Rd. over Traprock River?

It is owned by the County Highway Agency.