US Bridges

Mn 23 over Redwood River

Fair

Lyon County, Minnesota · 4.3 MI N of E JCT TH19 · Structure no. 42006

Built
1973
52 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
121 ft
3 main spans
Daily traffic
5,204
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 23 over Redwood River is a prestressed concrete stringer/multi-beam or girder carrying Mn 23 over Redwood River in Lyon County, Minnesota. It was built in 1973, so it is 52 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 5,204 vehicles a day, roughly 11% of them trucks, projected to reach 5,800 by 2042. The structure is 121 ft (36.8 m) long and 50 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMn 23
CrossesRedwood River
Location4.3 MI N of E JCT TH19
RouteState Highway 23
Coordinates44.51295, -95.75623
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating37.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length121 ft (36.8 m)
Longest span53 ft (16.2 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,204 (2022)
Projected traffic5,800 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Mn 23 over Redwood River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Mn 23 over Redwood River 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 October 2024.

How much traffic does Mn 23 over Redwood River carry?

About 5,204 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Mn 23 over Redwood River?

The structure is 121 ft (36.8 m) long with a longest span of 53 ft (16.2 m) and a deck 50 ft wide.

Who owns Mn 23 over Redwood River?

It is owned by the State Highway Agency.