US Bridges

Wood Bush Road over Traprock River

PoorPosted for load

Houghton County, Michigan · .75 MI S 1.25 MI E Copper · Structure no. 000000000003424

Built
1900
125 years old
Condition
Poor
inspected October 2023
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
80
1993 count
Owner
County
County Highway Agency

About this bridge

Wood Bush Road over Traprock River is a concrete slab carrying Wood Bush Road over Traprock River in Houghton County, Michigan. It was built in 1900, so it is 125 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 80 vehicles a day, projected to reach 100 by 2013. The structure is 24 ft (7.3 m) long and 20 ft wide.

Location

Open in Google Maps
CarriesWood Bush Road
CrossesTraprock River
Location.75 MI S 1.25 MI E Copper
RouteCounty Highway 0
CountyHoughton County
StateMichigan
Coordinates47.27157, -88.36059
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.2 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (1993)
Projected traffic100 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$250,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wood Bush Road over Traprock River built?

It was built in 1900, making it 125 years old in 2025.

What condition is Wood Bush Road over Traprock River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does Wood Bush Road over Traprock River carry?

About 80 vehicles per day (1993 count).

How long is Wood Bush Road over Traprock River?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns Wood Bush Road over Traprock River?

It is owned by the County Highway Agency.