US Bridges

Mn 61 over Kadunce River

Good

Cook County, Minnesota · 9.5 MI NE of Gunflint TR · Structure no. 16004

Built
2005
20 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
2,400
2018 count
Owner
State
State Highway Agency

About this bridge

Mn 61 over Kadunce River is a prestressed concrete stringer/multi-beam or girder carrying Mn 61 over Kadunce River in Cook County, Minnesota. It was built in 2005, so it is 20 years old, younger than the Minnesota average of 38.5 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 2,400 vehicles a day, roughly 7% of them trucks, projected to reach 2,350 by 2038. The structure is 53 ft (16.1 m) long and 51 ft wide. If it were closed, the detour would be 123 mi (198 km).

CarriesMn 61
CrossesKadunce River
Location9.5 MI NE of Gunflint TR
RouteState Highway 61
Coordinates47.79401, -90.15508
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating38.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length53 ft (16.1 m)
Longest span51 ft (15.4 m)
Deck width51 ft (15.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2018)
Projected traffic2,350 by 2038
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123 mi (198 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 61 over Kadunce River built?

It was built in 2005, making it 20 years old in 2025.

What condition is Mn 61 over Kadunce 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 August 2023.

How much traffic does Mn 61 over Kadunce River carry?

About 2,400 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is Mn 61 over Kadunce River?

The structure is 53 ft (16.1 m) long with a longest span of 51 ft (15.4 m) and a deck 51 ft wide.

Who owns Mn 61 over Kadunce River?

It is owned by the State Highway Agency.