US Bridges

Mn 91 over Stream

Fair

Nobles County, Minnesota · 0.3 MI N of Adrian · Structure no. 5653

Built
1936
89 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
3,300
2019 count
Owner
State
State Highway Agency

About this bridge

Mn 91 over Stream is a concrete culvert carrying Mn 91 over Stream in Nobles County, Minnesota. It was built in 1936, so it is 89 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 3,300 vehicles a day, roughly 12% of them trucks, projected to reach 2,900 by 2039. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesMn 91
CrossesStream
Location0.3 MI N of Adrian
RouteState Highway 91
CountyNobles County
StateMinnesota
Coordinates43.64087, -95.93311
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length26 ft (7.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2019)
Projected traffic2,900 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
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$33 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 91 over Stream built?

It was built in 1936, making it 89 years old in 2025.

What condition is Mn 91 over Stream 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 July 2023.

How much traffic does Mn 91 over Stream carry?

About 3,300 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is Mn 91 over Stream?

The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Mn 91 over Stream?

It is owned by the State Highway Agency.