When the Commission has thus been notified that such city or town has thus expressed its desire and purpose to purchase the property of the electrical utility operated under the indeterminate permit in such city or town and has also been notified that the parties to such purchase and sale have been unable to agree upon the amount to be paid and received therefor, the Commission shall, after not less than thirty days' notice to such city or town and to such electrical utility as well as to all of its mortgagees and lienors appearing of record in the county in which such city or town is situated, hold a public hearing upon the matter of just compensation, including severance damages if any, to be paid for the taking of such property by such city or town. Within a reasonable time after such public hearing the Commission shall by order fix and determine and certify to the clerk of such city or town, to the electrical utility and to any bondholder, mortgagee, lienor or other interested party who has entered an appearance in the proceeding the just compensation, including such damages if any. The order of the Commission may be reviewed as provided in this chapter for the review of other orders of the Commission.