US Bridges

IRR BIA RTE 44 over West Fork of Oak Creek

Fair

Corson County, South Dakota · 1 KM NE of Mahto · Structure no. 00000000000A067

Built
1961
64 years old, rebuilt 1988
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
93 ft
3 main spans
Daily traffic
213
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 44 over West Fork of Oak Creek is a prestressed concrete tee beam carrying IRR BIA RTE 44 over West Fork of Oak Creek in Corson County, South Dakota. It was built in 1961 and reconstructed in 1988, so it is 64 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 213 vehicles a day, roughly 12% of them trucks, projected to reach 273 by 2043. The structure is 93 ft (28.3 m) long and 31 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesIRR BIA RTE 44
CrossesWest Fork of Oak Creek
Location1 KM NE of Mahto
RouteFederal Lands Road 44
Coordinates45.76047, -100.67058
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating44.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length93 ft (28.3 m)
Longest span49 ft (14.9 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic213 (2023)
Projected traffic273 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
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 BIA RTE 44 over West Fork of Oak Creek built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1988.

What condition is IRR BIA RTE 44 over West Fork of Oak 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 May 2023.

How much traffic does IRR BIA RTE 44 over West Fork of Oak Creek carry?

About 213 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is IRR BIA RTE 44 over West Fork of Oak Creek?

The structure is 93 ft (28.3 m) long with a longest span of 49 ft (14.9 m) and a deck 31 ft wide.

Who owns IRR BIA RTE 44 over West Fork of Oak Creek?

It is owned by the Bureau of Indian Affairs.