US Bridges

Mn 4 over Sauk River

Good

Stearns County, Minnesota · 1.1 MI S of JCT TH 94 · Structure no. 73047

Built
2015
10 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
147 ft
2 main spans
Daily traffic
1,170
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 4 over Sauk River is a prestressed concrete stringer/multi-beam or girder carrying Mn 4 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 1,170 vehicles a day, roughly 8% of them trucks, projected to reach 830 by 2042. The structure is 147 ft (44.7 m) long and 39 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesMn 4
CrossesSauk River
Location1.1 MI S of JCT TH 94
RouteState Highway 4
Coordinates45.68096, -94.87422
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length147 ft (44.7 m)
Longest span72 ft (22 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,170 (2022)
Projected traffic830 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mn 4 over Sauk River built?

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

What condition is Mn 4 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 October 2023.

How much traffic does Mn 4 over Sauk River carry?

About 1,170 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Mn 4 over Sauk River?

The structure is 147 ft (44.7 m) long with a longest span of 72 ft (22 m) and a deck 39 ft wide.

Who owns Mn 4 over Sauk River?

It is owned by the State Highway Agency.