US Bridges

Mn 86 over I 90

Fair

Jackson County, Minnesota · At JCT TH 86 · Structure no. 32804

Built
1971
54 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
308 ft
4 main spans
Daily traffic
3,100
2018 count
Owner
State
State Highway Agency

About this bridge

Mn 86 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying Mn 86 over I 90 in Jackson County, Minnesota. It was built in 1971, so it is 54 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 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 3,100 vehicles a day, roughly 11% of them trucks, projected to reach 2,950 by 2038. The structure is 308 ft (93.8 m) long and 51 ft wide.

Location

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CarriesMn 86
CrossesI 90
LocationAt JCT TH 86
RouteState Highway 86
CountyJackson County
StateMinnesota
Coordinates43.63886, -95.17464
Functional classRural Minor Arterial

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.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating29.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length308 ft (93.8 m)
Longest span86 ft (26.2 m)
Deck width51 ft (15.5 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2018)
Projected traffic2,950 by 2038
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 86 over I 90 built?

It was built in 1971, making it 54 years old in 2025.

What condition is Mn 86 over I 90 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 August 2023.

How much traffic does Mn 86 over I 90 carry?

About 3,100 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is Mn 86 over I 90?

The structure is 308 ft (93.8 m) long with a longest span of 86 ft (26.2 m) and a deck 51 ft wide.

Who owns Mn 86 over I 90?

It is owned by the State Highway Agency.