US Bridges

Mn 21 over Stream

Fair

Scott County, Minnesota · 0.1 MI N of JCT TH 169 · Structure no. 8350

Built
1900
125 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
6,908
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 21 over Stream is a concrete culvert carrying Mn 21 over Stream in Scott County, Minnesota. It was built in 1900, so it is 125 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 5 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 6,908 vehicles a day, roughly 5% of them trucks, projected to reach 7,100 by 2042. The structure is 22 ft (6.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMn 21
CrossesStream
Location0.1 MI N of JCT TH 169
RouteState Highway 21
CountyScott County
StateMinnesota
Coordinates44.67485, -93.62585
Functional classUrban 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.8 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 traffic6,908 (2022)
Projected traffic7,100 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 21 over Stream built?

It was built in 1900, making it 125 years old in 2025.

What condition is Mn 21 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 August 2024.

How much traffic does Mn 21 over Stream carry?

About 6,908 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Mn 21 over Stream?

The structure is 22 ft (6.8 m) long with a longest span of 10 ft (3 m).

Who owns Mn 21 over Stream?

It is owned by the State Highway Agency.