US Bridges

IRR County Road over Creek

Fair

Dewey County, South Dakota · 7.0W 9.0S Timber Lk · Structure no. 000000021138120

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
20 ft
2 main spans
Daily traffic
38
2022 count
Owner
County
County Highway Agency

About this bridge

IRR County Road over Creek is a concrete continuous culvert carrying IRR County Road over Creek in Dewey 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 38 vehicles a day, roughly 2% of them trucks, projected to reach 38 by 2032. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIRR County Road
CrossesCreek
Location7.0W 9.0S Timber Lk
RouteCounty Highway 0
CountyDewey County
StateSouth Dakota
Coordinates45.29848, -101.22254
Functional classRural Local

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length20 ft (6.2 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 traffic38 (2022)
Projected traffic38 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 IRR County Road over Creek built?

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

What condition is IRR County Road over 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 June 2024.

How much traffic does IRR County Road over Creek carry?

About 38 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is IRR County Road over Creek?

The structure is 20 ft (6.2 m) long with a longest span of 10 ft (3 m).

Who owns IRR County Road over Creek?

It is owned by the County Highway Agency.