US Bridges

Mn 57 over Mid Fork Zumbro River

Good

Dodge County, Minnesota · 1.8 MI N of JCT Csah 22 · Structure no. 20017

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
135 ft
3 main spans
Daily traffic
1,600
2019 count
Owner
State
State Highway Agency

About this bridge

Mn 57 over Mid Fork Zumbro River is a prestressed concrete stringer/multi-beam or girder carrying Mn 57 over Mid Fork Zumbro River in Dodge County, Minnesota. It was built in 2019, so it is 6 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 1,600 vehicles a day, roughly 8% of them trucks, projected to reach 1,600 by 2039. The structure is 135 ft (41.2 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMn 57
CrossesMid Fork Zumbro River
Location1.8 MI N of JCT Csah 22
RouteState Highway 57
CountyDodge County
StateMinnesota
Coordinates44.1596, -92.77866
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 rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length135 ft (41.2 m)
Longest span63 ft (19.2 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2019)
Projected traffic1,600 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 57 over Mid Fork Zumbro River built?

It was built in 2019, making it 6 years old in 2025.

What condition is Mn 57 over Mid Fork Zumbro 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 57 over Mid Fork Zumbro River carry?

About 1,600 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is Mn 57 over Mid Fork Zumbro River?

The structure is 135 ft (41.2 m) long with a longest span of 63 ft (19.2 m) and a deck 39 ft wide.

Who owns Mn 57 over Mid Fork Zumbro River?

It is owned by the State Highway Agency.