US Bridges

Plains Road over Sturgeon River

Good

Baraga County, Michigan · 5 MI NW of Covington · Structure no. 000000000000510

Built
1984
41 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
100 ft
2 main spans
Daily traffic
183
2015 count
Owner
County
County Highway Agency

About this bridge

Plains Road over Sturgeon River is a prestressed concrete box beam or girders - multiple carrying Plains Road over Sturgeon River in Baraga County, Michigan. It was built in 1984, so it is 41 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 183 vehicles a day, roughly 1% of them trucks, projected to reach 250 by 2035. The structure is 100 ft (30.4 m) long and 31 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesPlains Road
CrossesSturgeon River
Location5 MI NW of Covington
RouteCounty Highway 719
CountyBaraga County
StateMichigan
Coordinates46.58391, -88.57543
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating94.2 US tons
Inventory rating56.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length100 ft (30.4 m)
Longest span48 ft (14.6 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic183 (2015)
Projected traffic250 by 2035
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$235,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Plains Road over Sturgeon River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Plains Road over Sturgeon 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 Plains Road over Sturgeon River carry?

About 183 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Plains Road over Sturgeon River?

The structure is 100 ft (30.4 m) long with a longest span of 48 ft (14.6 m) and a deck 31 ft wide.

Who owns Plains Road over Sturgeon River?

It is owned by the County Highway Agency.