S.D. Codified Laws § 5-7-23.1
Term of geothermal leases
The term of all geothermal leases shall be for a period not to exceed ten years and as long as geothermal resources are produced from the leased lands.
Source: SL 1980, ch 40, § 8.
S.D. Codified Laws § 5-7-23.1