US Bridges

Mn 23 over Split Rock Creek

Fair

Pipestone County, Minnesota · 0.5 MI SW of Ihlen · Structure no. 5679

Built
1937
88 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
85 ft
2 main spans
Daily traffic
3,278
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 23 over Split Rock Creek is a steel continuous stringer/multi-beam or girder carrying Mn 23 over Split Rock Creek in Pipestone County, Minnesota. It was built in 1937, so it is 88 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 3,278 vehicles a day, roughly 12% of them trucks, projected to reach 3,350 by 2042. The structure is 85 ft (25.9 m) long and 50 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMn 23
CrossesSplit Rock Creek
Location0.5 MI SW of Ihlen
RouteState Highway 23
CountyPipestone County
StateMinnesota
Coordinates43.90436, -96.37312
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating79.9 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span42 ft (12.7 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,278 (2022)
Projected traffic3,350 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Split Rock Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is Mn 23 over Split Rock Creek 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 September 2023.

How much traffic does Mn 23 over Split Rock Creek carry?

About 3,278 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Mn 23 over Split Rock Creek?

The structure is 85 ft (25.9 m) long with a longest span of 42 ft (12.7 m) and a deck 50 ft wide.

Who owns Mn 23 over Split Rock Creek?

It is owned by the State Highway Agency.