Every county shall have the power to contract with electric and communication utilities for the conversion of existing overhead electric and communication facilities to underground facilities, for the conversion of existing street and road lighting facilities to ornamental street and road lighting facilities to be served from underground electrical facilities[,] for the initial installation of ornamental street and road lighting facilities to be served from underground electrical facilities and for the initial installation of underground electric and communication facilities. Such contracts may provide, among other provisions, any of the following:
RCW 36.88.440