US Bridges

Mn 21 over UP Railroad

Good

Scott County, Minnesota · 0.5 MI S of JCT Mn 282 · Structure no. 70049

Built
2020
5 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
232 ft
3 main spans
Daily traffic
11,106
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 21 over UP Railroad is a prestressed concrete stringer/multi-beam or girder carrying Mn 21 over UP Railroad in Scott County, Minnesota. It was built in 2020, so it is 5 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 11,106 vehicles a day, roughly 4% of them trucks, projected to reach 14,200 by 2042. The structure is 232 ft (70.7 m) long and 45 ft wide.

CarriesMn 21
CrossesUP Railroad
Location0.5 MI S of JCT Mn 282
RouteState Highway 21
Coordinates44.65993, -93.62816
Functional classUrban Minor Arterial

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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating45.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length232 ft (70.7 m)
Longest span98 ft (29.9 m)
Deck width45 ft (13.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,106 (2022)
Projected traffic14,200 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 21 over UP Railroad built?

It was built in 2020, making it 5 years old in 2025.

What condition is Mn 21 over UP Railroad 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 August 2024.

How much traffic does Mn 21 over UP Railroad carry?

About 11,106 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Mn 21 over UP Railroad?

The structure is 232 ft (70.7 m) long with a longest span of 98 ft (29.9 m) and a deck 45 ft wide.

Who owns Mn 21 over UP Railroad?

It is owned by the State Highway Agency.