US Bridges

Forest Road 3350 over Bush Creek

FairPosted for load

Iron County, Michigan · 4.5 MI NW Gibbs City · Structure no. 090703000001009

Built
1955
70 years old, rebuilt 1995
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
44 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road 3350 over Bush Creek is a concrete tee beam carrying Forest Road 3350 over Bush Creek in Iron County, Michigan. It was built in 1955 and reconstructed in 1995, so it is 70 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 44 ft (13.4 m) long and 16 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

Open in Google Maps
CarriesForest Road 3350
CrossesBush Creek
Location4.5 MI NW Gibbs City
RouteFederal Lands Road 3350
CountyIron County
StateMichigan
Coordinates46.26639, -88.77387
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length44 ft (13.4 m)
Longest span42 ft (12.8 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Forest Road 3350 over Bush Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1995.

What condition is Forest Road 3350 over Bush Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does Forest Road 3350 over Bush Creek carry?

About 50 vehicles per day (latest count).

How long is Forest Road 3350 over Bush Creek?

The structure is 44 ft (13.4 m) long with a longest span of 42 ft (12.8 m) and a deck 16 ft wide.

Who owns Forest Road 3350 over Bush Creek?

It is owned by the U.S. Forest Service.