US Bridges

Mn 91 over Stream

Fair

Murray County, Minnesota · 1.0 MI N of JCT TH 30 · Structure no. 8854

Built
1955
70 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
467
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 91 over Stream is a concrete culvert carrying Mn 91 over Stream in Murray County, Minnesota. It was built in 1955, so it is 70 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.

It carries about 467 vehicles a day, roughly 14% of them trucks, projected to reach 510 by 2042. The structure is 27 ft (8.3 m) long. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesMn 91
CrossesStream
Location1.0 MI N of JCT TH 30
RouteState Highway 91
CountyMurray County
StateMinnesota
Coordinates44.006, -95.94376
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 length27 ft (8.3 m)
Longest span12 ft (3.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic467 (2022)
Projected traffic510 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$100 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 91 over Stream built?

It was built in 1955, making it 70 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 August 2023.

How much traffic does Mn 91 over Stream carry?

About 467 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Mn 91 over Stream?

The structure is 27 ft (8.3 m) long with a longest span of 12 ft (3.8 m).

Who owns Mn 91 over Stream?

It is owned by the State Highway Agency.