US Bridges

Csah 31 over Trout Creek

Fair

Winona County, Minnesota · 1.8 MI S of N County Lin · Structure no. 92623

Built
1968
57 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
48 ft
3 main spans
Daily traffic
75
2010 count
Owner
County
County Highway Agency

About this bridge

Csah 31 over Trout Creek is a concrete culvert carrying Csah 31 over Trout Creek in Winona County, Minnesota. It was built in 1968, so it is 57 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 75 vehicles a day, projected to reach 75 by 2039. The structure is 48 ft (14.6 m) long. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCsah 31
CrossesTrout Creek
Location1.8 MI S of N County Lin
RouteCounty Highway 31
CountyWinona County
StateMinnesota
Coordinates44.1676, -91.92956
Functional classRural Minor 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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2010)
Projected traffic75 by 2039
Trucks—
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$208 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 31 over Trout Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Csah 31 over Trout Creek 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 November 2024.

How much traffic does Csah 31 over Trout Creek carry?

About 75 vehicles per day (2010 count).

How long is Csah 31 over Trout Creek?

The structure is 48 ft (14.6 m) long with a longest span of 13 ft (3.9 m).

Who owns Csah 31 over Trout Creek?

It is owned by the County Highway Agency.