US Bridges

US 169 over Minn R UP Rr; Str

Fair

Blue Earth County, Minnesota · At N CO Line in Mankato · Structure no. 9098

Built
1960
65 years old, rebuilt 1992
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,594 ft
19 main spans
Daily traffic
34,432
2022 count
Owner
State
State Highway Agency

About this bridge

US 169 over Minn R UP Rr; Str is a prestressed concrete stringer/multi-beam or girder carrying US 169 over Minn R UP Rr; Str in Blue Earth County, Minnesota. It was built in 1960 and reconstructed in 1992, so it is 65 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 34,432 vehicles a day, roughly 9% of them trucks, projected to reach 32,500 by 2042. The structure is 1,594 ft (485.9 m) long and 112 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 169
CrossesMinn R UP Rr; Str
LocationAt N CO Line in Mankato
RouteU.S. Route 169
CountyBlue Earth County
StateMinnesota
Coordinates44.16361, -94.01821
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans19
Design loadHS 25 or greater
Structure length1,594 ft (485.9 m)
Longest span124 ft (37.8 m)
Deck width112 ft (34.2 m)
Roadway width101 ft (30.8 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic34,432 (2022)
Projected traffic32,500 by 2042
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 169 over Minn R UP Rr; Str built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1992.

What condition is US 169 over Minn R UP Rr; Str 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 US 169 over Minn R UP Rr; Str carry?

About 34,432 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is US 169 over Minn R UP Rr; Str?

The structure is 1,594 ft (485.9 m) long with a longest span of 124 ft (37.8 m) and a deck 112 ft wide.

Who owns US 169 over Minn R UP Rr; Str?

It is owned by the State Highway Agency.