[A]n easement or right-of-way [is granted to Southwestern Gas & Electric Company] for an electric transmission and distributing line, consisting of variable numbers of wires, and all necessary or desirable appurtenances (including towers or poles made of wood, metal or other materials, telephone and telegraph wires, props and guys), at or near the location and along the general course now located and staked out by the said Company over, across and upon the following described lands . . . .