US Bridges

IRR US212 over Little Bear Ck

Good

Dewey County, South Dakota · 1.8 E Ziebach CO Line · Structure no. 000000021021307

Built
2023
2 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
119 ft
1 main span
Daily traffic
1,291
2024 count
Owner
State
State Highway Agency

About this bridge

IRR US212 over Little Bear Ck is a prestressed concrete stringer/multi-beam or girder carrying IRR US212 over Little Bear Ck in Dewey County, South Dakota. It was built in 2023, so it is 2 years old, younger than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,291 vehicles a day, roughly 8% of them trucks, projected to reach 1,957 by 2044. The structure is 119 ft (36.4 m) long and 43 ft wide. If it were closed, the detour would be 51 mi (82 km).

CarriesIRR US212
CrossesLittle Bear Ck
Location1.8 E Ziebach CO Line
RouteU.S. Route 212
Coordinates45.02782, -101.45728
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating72.9 US tons
Inventory rating46.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length119 ft (36.4 m)
Longest span117 ft (35.7 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,291 (2024)
Projected traffic1,957 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed51 mi (82 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 Little Bear Ck built?

It was built in 2023, making it 2 years old in 2025.

What condition is IRR US212 over Little Bear Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does IRR US212 over Little Bear Ck carry?

About 1,291 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is IRR US212 over Little Bear Ck?

The structure is 119 ft (36.4 m) long with a longest span of 117 ft (35.7 m) and a deck 43 ft wide.

Who owns IRR US212 over Little Bear Ck?

It is owned by the State Highway Agency.