US Bridges

Mn 15 over UP RR

Fair

Watonwan County, Minnesota · 0.3 MI W of N JCT of TH6 · Structure no. 83022

Built
1975
50 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
186 ft
3 main spans
Daily traffic
2,175
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 15 over UP RR is a prestressed concrete stringer/multi-beam or girder carrying Mn 15 over UP RR in Watonwan County, Minnesota. It was built in 1975, so it is 50 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 2,175 vehicles a day, roughly 19% of them trucks, projected to reach 2,500 by 2041. The structure is 186 ft (56.6 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMn 15
CrossesUP RR
Location0.3 MI W of N JCT of TH6
RouteState Highway 15
CountyWatonwan County
StateMinnesota
Coordinates44.05869, -94.40491
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.7 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length186 ft (56.6 m)
Longest span65 ft (19.8 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,175 (2021)
Projected traffic2,500 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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 15 over UP RR built?

It was built in 1975, making it 50 years old in 2025.

What condition is Mn 15 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 May 2024.

How much traffic does Mn 15 over UP RR carry?

About 2,175 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is Mn 15 over UP RR?

The structure is 186 ft (56.6 m) long with a longest span of 65 ft (19.8 m) and a deck 50 ft wide.

Who owns Mn 15 over UP RR?

It is owned by the State Highway Agency.