US Bridges

Csah 31 over Trout Creek

Fair

Winona County, Minnesota · 0.3 MI S of N CO Line · Structure no. 85515

Built
1978
47 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
103 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 continuous slab carrying Csah 31 over Trout Creek in Winona County, Minnesota. It was built in 1978, so it is 47 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 103 ft (31.5 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesCsah 31
CrossesTrout Creek
Location0.3 MI S of N CO Line
RouteCounty Highway 31
Coordinates44.18898, -91.92982
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86.5 US tons
Inventory rating51.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length103 ft (31.5 m)
Longest span39 ft (11.9 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.8 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 closed11.8 mi (19 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 31 over Trout Creek built?

It was built in 1978, making it 47 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 103 ft (31.5 m) long with a longest span of 39 ft (11.9 m) and a deck 36 ft wide.

Who owns Csah 31 over Trout Creek?

It is owned by the County Highway Agency.