US Bridges

Csah 31 over Redwood River

Fair

Lyon County, Minnesota · 0.5 MI W of Russell · Structure no. 5749

Built
1936
89 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
39 ft
3 main spans
Daily traffic
462
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 31 over Redwood River is a concrete culvert carrying Csah 31 over Redwood River in Lyon County, Minnesota. It was built in 1936, so it is 89 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 462 vehicles a day, projected to reach 530 by 2042. The structure is 39 ft (12 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCsah 31
CrossesRedwood River
Location0.5 MI W of Russell
RouteCounty Highway 31
CountyLyon County
StateMinnesota
Coordinates44.31481, -95.9591
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 rating25.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length39 ft (12 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic462 (2022)
Projected traffic530 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$376 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 31 over Redwood River built?

It was built in 1936, making it 89 years old in 2025.

What condition is Csah 31 over Redwood River 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 October 2023.

How much traffic does Csah 31 over Redwood River carry?

About 462 vehicles per day (2022 count).

How long is Csah 31 over Redwood River?

The structure is 39 ft (12 m) long with a longest span of 12 ft (3.7 m).

Who owns Csah 31 over Redwood River?

It is owned by the County Highway Agency.