South Dakota Codified Laws
Chapter 39A - Energy Minerals Severance Tax
Section 10-39A-2.2 - Uranium ore taxed on triuranium octa-oxide content.

10-39A-2.2. Uranium ore taxed on triuranium octa-oxide content.
The taxable value of severed and saved uranium-bearing material is the sales price per pound of the content of triuranium octa-oxide contained in the severed and saved uranium ore or processed yellow-cake concentrate, regardless of the form in which the product is actually disposed of. However, if the severed and saved uranium ore or processed uranium yellow-cake concentrate is not sold, the taxable value is the market value of the triuranium octa-oxide in such material.

Source: SL 1978, ch 81, ยง6.