US Bridges

Mn 20 over Stream

Fair

Dakota County, Minnesota · 2.1 MI S of JCT TH 61 · Structure no. 4775

Built
1931
94 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
2,600
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 20 over Stream is a concrete culvert carrying Mn 20 over Stream in Dakota County, Minnesota. It was built in 1931, so it is 94 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 6 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 2,600 vehicles a day, roughly 6% of them trucks, projected to reach 3,050 by 2042. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMn 20
CrossesStream
Location2.1 MI S of JCT TH 61
RouteState Highway 20
CountyDakota County
StateMinnesota
Coordinates44.57427, -92.87259
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2022)
Projected traffic3,050 by 2042
Trucks6%
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$37 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 20 over Stream built?

It was built in 1931, making it 94 years old in 2025.

What condition is Mn 20 over Stream 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 October 2024.

How much traffic does Mn 20 over Stream carry?

About 2,600 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Mn 20 over Stream?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns Mn 20 over Stream?

It is owned by the State Highway Agency.