US Bridges

Mn 55 over UP RR

Fair

Hennepin County, Minnesota · 1.4 MI SE of JCT TH 494 · Structure no. 6721

Built
1952
73 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
126 ft
3 main spans
Daily traffic
18,000
2019 count
Owner
State
State Highway Agency

About this bridge

Mn 55 over UP RR is a steel stringer/multi-beam or girder carrying Mn 55 over UP RR in Hennepin County, Minnesota. It was built in 1952, so it is 73 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 18,000 vehicles a day, roughly 3% of them trucks, projected to reach 19,750 by 2039. The structure is 126 ft (38.4 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMn 55
CrossesUP RR
Location1.4 MI SE of JCT TH 494
RouteState Highway 55
CountyHennepin County
StateMinnesota
Coordinates44.99598, -93.43799
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.3 US tons
Inventory rating55.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span42 ft (12.8 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2019)
Projected traffic19,750 by 2039
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 55 over UP RR built?

It was built in 1952, making it 73 years old in 2025.

What condition is Mn 55 over UP RR 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 June 2023.

How much traffic does Mn 55 over UP RR carry?

About 18,000 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Mn 55 over UP RR?

The structure is 126 ft (38.4 m) long with a longest span of 42 ft (12.8 m) and a deck 44 ft wide.

Who owns Mn 55 over UP RR?

It is owned by the State Highway Agency.