US Bridges

Csah 4 over Cottonwood River

Fair

Redwood County, Minnesota · 0.6 MI W of JCT Csah 5 · Structure no. 64523

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
186 ft
4 main spans
Daily traffic
150
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Cottonwood River is a wood or timber stringer/multi-beam or girder carrying Csah 4 over Cottonwood River in Redwood County, Minnesota. It was built in 1975, so it is 50 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 150 vehicles a day, projected to reach 155 by 2039. The structure is 186 ft (56.6 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 4
CrossesCottonwood River
Location0.6 MI W of JCT Csah 5
RouteCounty Highway 4
CountyRedwood County
StateMinnesota
Coordinates44.32666, -95.4837
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadHS 20
Structure length186 ft (56.6 m)
Longest span46 ft (14.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2019)
Projected traffic155 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 4 over Cottonwood River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Csah 4 over Cottonwood 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 September 2024.

How much traffic does Csah 4 over Cottonwood River carry?

About 150 vehicles per day (2019 count).

How long is Csah 4 over Cottonwood River?

The structure is 186 ft (56.6 m) long with a longest span of 46 ft (14.1 m) and a deck 34 ft wide.

Who owns Csah 4 over Cottonwood River?

It is owned by the County Highway Agency.