US Bridges

Csah 15 over Cottonwood River

Good

Redwood County, Minnesota · 1.0 MI W of JCT TH 71 · Structure no. 64580

Built
2014
11 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
235 ft
3 main spans
Daily traffic
420
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 15 over Cottonwood River is a prestressed concrete stringer/multi-beam or girder carrying Csah 15 over Cottonwood River in Redwood County, Minnesota. It was built in 2014, so it is 11 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 420 vehicles a day, projected to reach 572 by 2039. The structure is 235 ft (71.6 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 15
CrossesCottonwood River
Location1.0 MI W of JCT TH 71
RouteCounty Highway 15
CountyRedwood County
StateMinnesota
Coordinates44.20977, -95.14179
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length235 ft (71.6 m)
Longest span78 ft (23.7 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2019)
Projected traffic572 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 15 over Cottonwood River built?

It was built in 2014, making it 11 years old in 2025.

What condition is Csah 15 over Cottonwood River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Csah 15 over Cottonwood River carry?

About 420 vehicles per day (2019 count).

How long is Csah 15 over Cottonwood River?

The structure is 235 ft (71.6 m) long with a longest span of 78 ft (23.7 m) and a deck 35 ft wide.

Who owns Csah 15 over Cottonwood River?

It is owned by the County Highway Agency.