US Bridges

Mn 91 over Unnamed Stream

Good

Nobles County, Minnesota · 4.7 MI N of JCT I 90 · Structure no. 53X10

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
1,350
2019 count
Owner
State
State Highway Agency

About this bridge

Mn 91 over Unnamed Stream is a concrete culvert carrying Mn 91 over Unnamed Stream in Nobles County, Minnesota. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,350 vehicles a day, roughly 21% of them trucks, projected to reach 1,500 by 2039. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMn 91
CrossesUnnamed Stream
Location4.7 MI N of JCT I 90
RouteState Highway 91
CountyNobles County
StateMinnesota
Coordinates43.71364, -95.93286
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2019)
Projected traffic1,500 by 2039
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 91 over Unnamed Stream built?

It was built in 2019, making it 6 years old in 2025.

What condition is Mn 91 over Unnamed Stream 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 October 2023.

How much traffic does Mn 91 over Unnamed Stream carry?

About 1,350 vehicles per day (2019 count), of which roughly 21% are trucks.

How long is Mn 91 over Unnamed Stream?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns Mn 91 over Unnamed Stream?

It is owned by the State Highway Agency.