US Bridges

Mn 23 over Split Rock Creek

Fair

Pipestone County, Minnesota · 0.8 MI NE of Ihlen · Structure no. 5566

Built
1947
78 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
3,974
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 23 over Split Rock Creek is a concrete culvert carrying Mn 23 over Split Rock Creek in Pipestone County, Minnesota. It was built in 1947, so it is 78 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 3,974 vehicles a day, roughly 12% of them trucks, projected to reach 3,800 by 2041. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesMn 23
CrossesSplit Rock Creek
Location0.8 MI NE of Ihlen
RouteState Highway 23
CountyPipestone County
StateMinnesota
Coordinates43.92161, -96.36215
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length31 ft (9.4 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,974 (2021)
Projected traffic3,800 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$247 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 23 over Split Rock Creek built?

It was built in 1947, making it 78 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 3,974 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is Mn 23 over Split Rock Creek?

The structure is 31 ft (9.4 m) long with a longest span of 12 ft (3.7 m).

Who owns Mn 23 over Split Rock Creek?

It is owned by the State Highway Agency.