US Bridges

IRR US212 over Bear Ck

Fair

Ziebach County, South Dakota · 0.5 W of Dupree · Structure no. 000000069194290

Built
1954
71 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
129 ft
5 main spans
Daily traffic
1,130
2024 count
Owner
State
State Highway Agency

About this bridge

IRR US212 over Bear Ck is a concrete continuous slab carrying IRR US212 over Bear Ck in Ziebach County, South Dakota. It was built in 1954, so it is 71 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 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 1,130 vehicles a day, roughly 14% of them trucks, projected to reach 1,713 by 2044. The structure is 129 ft (39.2 m) long and 34 ft wide. If it were closed, the detour would be 70.2 mi (113 km).

CarriesIRR US212
CrossesBear Ck
Location0.5 W of Dupree
RouteU.S. Route 212
Coordinates45.0528, -101.61913
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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.8 US tons
Inventory rating36.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length129 ft (39.2 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,130 (2024)
Projected traffic1,713 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.2 mi (113 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 IRR US212 over Bear Ck built?

It was built in 1954, making it 71 years old in 2025.

What condition is IRR US212 over Bear 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 March 2024.

How much traffic does IRR US212 over Bear Ck carry?

About 1,130 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is IRR US212 over Bear Ck?

The structure is 129 ft (39.2 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns IRR US212 over Bear Ck?

It is owned by the State Highway Agency.