US Bridges

Csah 31 over Sauk River

Good

Stearns County, Minnesota · 0.4 MI W of JCT Csah 12 · Structure no. 73579

Built
2015
10 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete Continuous
Length
158 ft
3 main spans
Daily traffic
385
2017 count
Owner
County
County Highway Agency

About this bridge

Csah 31 over Sauk River is a concrete continuous slab carrying Csah 31 over Sauk River in Stearns County, Minnesota. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 385 vehicles a day, projected to reach 385 by 2039. The structure is 158 ft (48.3 m) long and 35 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesCsah 31
CrossesSauk River
Location0.4 MI W of JCT Csah 12
RouteCounty Highway 31
Coordinates45.5857, -94.76877
Functional classRural Minor 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length158 ft (48.3 m)
Longest span60 ft (18.3 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic385 (2017)
Projected traffic385 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 31 over Sauk River built?

It was built in 2015, making it 10 years old in 2025.

What condition is Csah 31 over Sauk 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 January 2025.

How much traffic does Csah 31 over Sauk River carry?

About 385 vehicles per day (2017 count).

How long is Csah 31 over Sauk River?

The structure is 158 ft (48.3 m) long with a longest span of 60 ft (18.3 m) and a deck 35 ft wide.

Who owns Csah 31 over Sauk River?

It is owned by the County Highway Agency.