US Bridges

Forest Road over Sucker River

Good

Alger County, Michigan · 4 MI E of Grand Marais · Structure no. 000000000000070

Built
2001
24 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
20
1995 count
Owner
County
County Highway Agency

About this bridge

Forest Road over Sucker River is a prestressed concrete box beam or girders - multiple carrying Forest Road over Sucker River in Alger County, Michigan. It was built in 2001, so it is 24 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, projected to reach 40 by 2015. The structure is 59 ft (18 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesForest Road
CrossesSucker River
Location4 MI E of Grand Marais
Coordinates46.6701, -85.90106
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length59 ft (18 m)
Longest span59 ft (18 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (1995)
Projected traffic40 by 2015
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Forest Road over Sucker River built?

It was built in 2001, making it 24 years old in 2025.

What condition is Forest Road over Sucker 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 September 2023.

How much traffic does Forest Road over Sucker River carry?

About 20 vehicles per day (1995 count).

How long is Forest Road over Sucker River?

The structure is 59 ft (18 m) long with a longest span of 59 ft (18 m) and a deck 28 ft wide.

Who owns Forest Road over Sucker River?

It is owned by the County Highway Agency.