US Bridges

Froberg Road over Eaststurgeonslough

Good

Baraga County, Michigan · 7 MI NW of Baraga · Structure no. 000000000000507

Built
1985
40 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
144
2014 count
Owner
County
County Highway Agency

About this bridge

Froberg Road over Eaststurgeonslough is a prestressed concrete box beam or girders - multiple carrying Froberg Road over Eaststurgeonslough in Baraga County, Michigan. It was built in 1985, so it is 40 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 144 vehicles a day, roughly 2% of them trucks, projected to reach 250 by 2034. The structure is 60 ft (18.3 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesFroberg Road
CrossesEaststurgeonslough
Location7 MI NW of Baraga
RouteCounty Highway 723
CountyBaraga County
StateMichigan
Coordinates46.83673, -88.57731
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.3 US tons
Inventory rating58.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span55 ft (16.8 m)
Deck width31 ft (9.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144 (2014)
Projected traffic250 by 2034
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Froberg Road over Eaststurgeonslough built?

It was built in 1985, making it 40 years old in 2025.

What condition is Froberg Road over Eaststurgeonslough 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 Froberg Road over Eaststurgeonslough carry?

About 144 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Froberg Road over Eaststurgeonslough?

The structure is 60 ft (18.3 m) long with a longest span of 55 ft (16.8 m) and a deck 31 ft wide.

Who owns Froberg Road over Eaststurgeonslough?

It is owned by the County Highway Agency.