US Bridges

Kyro Road over Sturgeon River

Fair

Baraga County, Michigan · 6 MI W of Baraga · Structure no. 000000000000516

Built
1988
37 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
162 ft
3 main spans
Daily traffic
176
2015 count
Owner
County
County Highway Agency

About this bridge

Kyro Road over Sturgeon River is a prestressed concrete continuous stringer/multi-beam or girder carrying Kyro Road over Sturgeon River in Baraga County, Michigan. It was built in 1988, so it is 37 years old, younger 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 176 vehicles a day, roughly 3% of them trucks, projected to reach 250 by 2035. The structure is 162 ft (49.3 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesKyro Road
CrossesSturgeon River
Location6 MI W of Baraga
RouteCounty Highway 0
CountyBaraga County
StateMichigan
Coordinates46.80115, -88.62244
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.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 alignment8: Equal to present desirable criteria
Operating rating84.7 US tons
Inventory rating50.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length162 ft (49.3 m)
Longest span51 ft (15.4 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic176 (2015)
Projected traffic250 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Kyro Road over Sturgeon River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Kyro Road over Sturgeon River 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 September 2023.

How much traffic does Kyro Road over Sturgeon River carry?

About 176 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Kyro Road over Sturgeon River?

The structure is 162 ft (49.3 m) long with a longest span of 51 ft (15.4 m) and a deck 30 ft wide.

Who owns Kyro Road over Sturgeon River?

It is owned by the County Highway Agency.