US Bridges

Csah 20 over Stream

Fair

Winona County, Minnesota · 0.9 MI W of JCT TH 4 · Structure no. 91758

Built
1979
46 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
44 ft
4 main spans
Daily traffic
270
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over Stream is a concrete culvert carrying Csah 20 over Stream in Winona County, Minnesota. It was built in 1979, so it is 46 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 270 vehicles a day, projected to reach 300 by 2039. The structure is 44 ft (13.5 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesCsah 20
CrossesStream
Location0.9 MI W of JCT TH 4
RouteCounty Highway 20
Coordinates44.02406, -91.80283
Functional classRural Local

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
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 alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length44 ft (13.5 m)
Longest span9 ft (2.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2019)
Projected traffic300 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 20 over Stream built?

It was built in 1979, making it 46 years old in 2025.

What condition is Csah 20 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 November 2023.

How much traffic does Csah 20 over Stream carry?

About 270 vehicles per day (2019 count).

How long is Csah 20 over Stream?

The structure is 44 ft (13.5 m) long with a longest span of 9 ft (2.6 m).

Who owns Csah 20 over Stream?

It is owned by the County Highway Agency.