Every corporation incorporated or that may hereafter be incorporated under the laws of this state, or of any other state or territory of the United States and doing business in this state for the purpose of operating railroads or railways by electric power, shall have the right to appropriate real estate and other property for right-of-way or for any corporate purpose, in the same manner and under the same procedure as now is or may hereafter be provided by law in the case of ordinary railroad corporations authorized by the laws of this state to exercise the right of eminent domain: PROVIDED, That such right of eminent domain shall not be exercised with respect to any public road or street until the location of the electric railroad or railway thereon has been authorized in accordance with RCW 81.64.010 through 81.64.030.