US Bridges

CR 81 over Mustinka River

FairPosted for load

Traverse County, Minnesota · 1.2 MI N of JCT CSAH14 · Structure no. 89667

Built
1954
71 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
100 ft
3 main spans
Daily traffic
50
2012 count
Owner
County
County Highway Agency

About this bridge

CR 81 over Mustinka River is a steel stringer/multi-beam or girder carrying CR 81 over Mustinka River in Traverse County, Minnesota. It was built in 1954, so it is 71 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 50 by 2039. The structure is 100 ft (30.5 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCR 81
CrossesMustinka River
Location1.2 MI N of JCT CSAH14
RouteCounty Highway 81
CountyTraverse County
StateMinnesota
Coordinates45.84911, -96.44873
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 rating36.2 US tons
Inventory rating21.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans3
Design loadH 15
Structure length100 ft (30.5 m)
Longest span42 ft (12.8 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2012)
Projected traffic50 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 CR 81 over Mustinka River built?

It was built in 1954, making it 71 years old in 2025.

What condition is CR 81 over Mustinka 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 December 2023.

How much traffic does CR 81 over Mustinka River carry?

About 50 vehicles per day (2012 count).

How long is CR 81 over Mustinka River?

The structure is 100 ft (30.5 m) long with a longest span of 42 ft (12.8 m) and a deck 26 ft wide.

Who owns CR 81 over Mustinka River?

It is owned by the County Highway Agency.