SDCL § 22-34-28: Substantial interruption or impairment--Utility Service--Critical Infrastructure--Violation as felony.

Any person who, by any means, knowingly damages or tampers with any property and, as a direct result:

(1) Causes a substantial interruption or impairment: in television, radio, telephone, telegraph, internet, or other mass communications service; in police, fire, or other public service communications; in radar, radio, or other electronic aids to air or marine navigation or communications; or in amateur or citizens band radio communications being used for public service or emergency communications;

(2) Causes a substantial interruption or impairment in:

(a) Public transportation;

(b) Water supply;

(c) Gas service;

(d) Electric service;

(e) Critical infrastructure facility; or

(f) Other utility service;

is guilty of a Class 6 felony, and, if such damage or tampering causes physical injury to another person, is guilty of a Class 4 felony.