US Bridges

Mn 56 over Stream

Poor

Mower County, Minnesota · 2.5 MI W of JCT Csah 14 · Structure no. 8489

Built
1940
85 years old
Condition
Poor
inspected August 2024
Type
Culvert
Concrete
Length
39 ft
3 main spans
Daily traffic
1,357
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 56 over Stream is a concrete culvert carrying Mn 56 over Stream in Mower County, Minnesota. It was built in 1940, so it is 85 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,357 vehicles a day, roughly 24% of them trucks, projected to reach 1,100 by 2042. The structure is 39 ft (11.9 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesMn 56
CrossesStream
Location2.5 MI W of JCT Csah 14
RouteState Highway 56
CountyMower County
StateMinnesota
Coordinates43.52572, -92.55411
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length39 ft (11.9 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,357 (2022)
Projected traffic1,100 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$142 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 56 over Stream built?

It was built in 1940, making it 85 years old in 2025.

What condition is Mn 56 over Stream in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Mn 56 over Stream carry?

About 1,357 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is Mn 56 over Stream?

The structure is 39 ft (11.9 m) long with a longest span of 14 ft (4.3 m).

Who owns Mn 56 over Stream?

It is owned by the State Highway Agency.