US Bridges

Csah 12 over South Brule River

Fair

Cook County, Minnesota · 15.0 MI N of JCT TH 61 · Structure no. 16516

Built
1996
29 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
1,441
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 12 over South Brule River is a prestressed concrete stringer/multi-beam or girder carrying Csah 12 over South Brule River in Cook County, Minnesota. It was built in 1996, so it is 29 years old, younger 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 1,441 vehicles a day, projected to reach 1,450 by 2042. The structure is 93 ft (28.4 m) long and 39 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCsah 12
CrossesSouth Brule River
Location15.0 MI N of JCT TH 61
RouteCounty Highway 12
CountyCook County
StateMinnesota
Coordinates47.92592, -90.30603
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.2 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length93 ft (28.4 m)
Longest span88 ft (26.8 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,441 (2022)
Projected traffic1,450 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 12 over South Brule River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Csah 12 over South Brule 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 12 over South Brule River carry?

About 1,441 vehicles per day (2022 count).

How long is Csah 12 over South Brule River?

The structure is 93 ft (28.4 m) long with a longest span of 88 ft (26.8 m) and a deck 39 ft wide.

Who owns Csah 12 over South Brule River?

It is owned by the County Highway Agency.