US Bridges

SD044 over White Thunder Ck

Fair

Mellette County, South Dakota · 2 W of Wood · Structure no. 000000048371255

Built
1981
44 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
323
2024 count
Owner
State
State Highway Agency

About this bridge

SD044 over White Thunder Ck is a concrete continuous culvert carrying SD044 over White Thunder Ck in Mellette County, South Dakota. It was built in 1981, so it is 44 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 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 323 vehicles a day, roughly 11% of them trucks, projected to reach 405 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 18 mi (29 km).

CarriesSD044
CrossesWhite Thunder Ck
Location2 W of Wood
RouteState Highway 44
Coordinates43.50067, -100.50759
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic323 (2024)
Projected traffic405 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SD044 over White Thunder Ck built?

It was built in 1981, making it 44 years old in 2025.

What condition is SD044 over White Thunder 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 February 2023.

How much traffic does SD044 over White Thunder Ck carry?

About 323 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is SD044 over White Thunder Ck?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns SD044 over White Thunder Ck?

It is owned by the State Highway Agency.