The right-of-way provided for under this section and §§ 18-15-502 — 18-15-509 shall be construed to include all lands necessary for dams and the backwater resulting therefrom, levees, approaches, abutments, canals, reservoirs, powerhouses, and other purposes incident to the business of generating, transmitting, distributing, or supplying electricity to or for the public for compensation or for public use by an electric utility, as defined in § 18-15-512.