S.D. Codified Laws § 49-34A-57
Extension of lines to serve utility's or municipality's own property
Notwithstanding the provisions in §§ 49-34A-43 and 49-34A-44 , any electric utility may extend electric lines for electric service to its own utility property and facilities. A municipally owned electric utility may also extend its electric lines to serve its own public service facilities such as water and sewage systems, landfills and airports.
Source: SL 1975, ch 283, § 44.