US Bridges

Csah 12 over Sauk River

Fair

Stearns County, Minnesota · 0.5 MI SE of JCT CR 177 · Structure no. 73516

Built
1973
52 years old
Condition
Fair
inspected December 2023
Type
Channel Beam
Prestressed Concrete
Length
186 ft
6 main spans
Daily traffic
1,100
2017 count
Owner
County
County Highway Agency

About this bridge

Csah 12 over Sauk River is a prestressed concrete channel beam carrying Csah 12 over Sauk River in Stearns County, Minnesota. It was built in 1973, so it is 52 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 5 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 1,100 vehicles a day, projected to reach 1,100 by 2039. The structure is 186 ft (56.8 m) long and 41 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCsah 12
CrossesSauk River
Location0.5 MI SE of JCT CR 177
RouteCounty Highway 12
CountyStearns County
StateMinnesota
Coordinates45.51951, -94.68051
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.8 US tons
Inventory rating41.8 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans6
Design loadH 20
Structure length186 ft (56.8 m)
Longest span31 ft (9.5 m)
Deck width41 ft (12.6 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2017)
Projected traffic1,100 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Sauk River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Csah 12 over Sauk 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 December 2023.

How much traffic does Csah 12 over Sauk River carry?

About 1,100 vehicles per day (2017 count).

How long is Csah 12 over Sauk River?

The structure is 186 ft (56.8 m) long with a longest span of 31 ft (9.5 m) and a deck 41 ft wide.

Who owns Csah 12 over Sauk River?

It is owned by the County Highway Agency.