US Bridges

IRR SD025 over Ck

Fair

Roberts County, South Dakota · 0.9 E Marshall CO Line · Structure no. 000000055009050

Built
1960
65 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
378
2024 count
Owner
State
State Highway Agency

About this bridge

IRR SD025 over Ck is a concrete continuous culvert carrying IRR SD025 over Ck in Roberts County, South Dakota. It was built in 1960, so it is 65 years old, older than the South Dakota average of 48.9 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 378 vehicles a day, roughly 19% of them trucks, projected to reach 445 by 2044. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 14.3 mi (23 km).

CarriesIRR SD025
CrossesCk
Location0.9 E Marshall CO Line
RouteState Highway 25
Coordinates45.86258, -97.21051
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87 US tons
Inventory rating52 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 20
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic378 (2024)
Projected traffic445 by 2044
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$12,000
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SD025 over Ck built?

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

What condition is IRR SD025 over Ck 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 July 2024.

How much traffic does IRR SD025 over Ck carry?

About 378 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is IRR SD025 over Ck?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m).

Who owns IRR SD025 over Ck?

It is owned by the State Highway Agency.