US Bridges

Csah 13 over Big Cottonwood River

Good

Brown County, Minnesota · 0.3 MI S of JCT Csah 26 · Structure no. 08512

Built
1969
56 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
321 ft
4 main spans
Daily traffic
2,428
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 13 over Big Cottonwood River is a prestressed concrete stringer/multi-beam or girder carrying Csah 13 over Big Cottonwood River in Brown County, Minnesota. It was built in 1969, so it is 56 years old, older 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 2,428 vehicles a day, projected to reach 2,200 by 2041. The structure is 321 ft (97.9 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCsah 13
CrossesBig Cottonwood River
Location0.3 MI S of JCT Csah 26
RouteCounty Highway 13
Coordinates44.29298, -94.48197
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating34.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length321 ft (97.9 m)
Longest span79 ft (24.1 m)
Deck width40 ft (12.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,428 (2021)
Projected traffic2,200 by 2041
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 13 over Big Cottonwood River built?

It was built in 1969, making it 56 years old in 2025.

What condition is Csah 13 over Big 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 October 2024.

How much traffic does Csah 13 over Big Cottonwood River carry?

About 2,428 vehicles per day (2021 count).

How long is Csah 13 over Big Cottonwood River?

The structure is 321 ft (97.9 m) long with a longest span of 79 ft (24.1 m) and a deck 40 ft wide.

Who owns Csah 13 over Big Cottonwood River?

It is owned by the County Highway Agency.