US Bridges

Mn 74 over Trout Run

Fair

Winona County, Minnesota · 2.5 MI N of W JCT TH 14 · Structure no. 8543

Built
1941
84 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
1,184
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 74 over Trout Run is a concrete culvert carrying Mn 74 over Trout Run in Winona County, Minnesota. It was built in 1941, so it is 84 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 1,184 vehicles a day, roughly 8% of them trucks, projected to reach 1,200 by 2042. The structure is 31 ft (9.6 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesMn 74
CrossesTrout Run
Location2.5 MI N of W JCT TH 14
RouteState Highway 74
CountyWinona County
StateMinnesota
Coordinates44.00816, -92.06945
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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
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 rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length31 ft (9.6 m)
Longest span15 ft (4.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,184 (2022)
Projected traffic1,200 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$30 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 74 over Trout Run built?

It was built in 1941, making it 84 years old in 2025.

What condition is Mn 74 over Trout Run 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 June 2024.

How much traffic does Mn 74 over Trout Run carry?

About 1,184 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Mn 74 over Trout Run?

The structure is 31 ft (9.6 m) long with a longest span of 15 ft (4.5 m).

Who owns Mn 74 over Trout Run?

It is owned by the State Highway Agency.