S.D. Codified Laws § 43-13-20.2
For purposes of §§ 43-13-17 to 43-13-20.5, inclusive, development of the potential to produce energy from wind power associated with the wind easement or wind lease occurs when the foundation is poured for the first wind turbine to be installed on any property that is part of any one wind energy project, on any property that is part of any single construction stage of a wind energy project, or on any property that is described in the notice required by § 49-41B-25.1. Development of the potential to produce energy from solar power associated with the solar easement or solar lease occurs when the mounting system is installed for the first photovoltaic panel on any property that is part of any one solar energy project or on any property that is part of any single construction stage of a solar energy project.
SDCL 43-13-20.2