Wash. Rev. Code § 35.96.020
As used in this chapter, unless specifically defined otherwise, or unless the context indicates otherwise:
"Conversion area" means that area in which existing overhead electric and communication facilities are to be converted to underground facilities pursuant to the provisions of this chapter.
"Electric utility" means any publicly or privately owned utility engaged in the business of furnishing electric energy to the public in all or part of the conversion area and includes electrical companies as defined by RCW 80.04.010 and public utility districts.
"Communication utility" means any utility engaged in the business of affording telephonic, telegraphic, cable television or other communication service to the public in all or part of the conversion area and includes telephone companies and telegraph companies as defined by RCW 80.04.010.
RCW 35.96.020