A corporation created under the provisions of this chapter shall have power to do any and all acts or things necessary or convenient for carrying out the purpose for which it was formed, including, but not limited to the power: To sue and be sued; to have a seal and alter the same at pleasure; to acquire, hold and dispose of property, real and personal, tangible and intangible, or interests therein, and to pay therefor in cash or on credit, and to secure and procure payment of all or any part of the purchase price thereof on such terms and conditions as the board shall determine; to acquire, own, operate, maintain and improve a system or systems; to pledge all or any part of its revenues or mortgage or otherwise encumber all or any part of its property for the purpose of securing the payment of the principal of and interest on any of its obligations; to construct works across or along any street or public highway or over any lands which are now or may be the property of this state or any political subdivision thereof without obtaining any franchise or other permit therefor. The corporation shall, however, restore any such street or highway to its former condition or state as near as may be and shall not use the same in a manner to impair unnecessarily its usefulness. Said corporation shall also have the power: To accept gifts or grants of property, real or personal, from any person, municipality or federal agency and to accept voluntary and uncompensated services; to make any and all contracts necessary or convenient for the full exercise of the powers in this chapter granted, including, without limiting the generality of the foregoing, contracts with any person, federal agency or municipality for the purchase or sale of energy; for the management and conduct of the business of the corporation, including the regulation of the rates, fees or charges for service rendered by the corporation; to sell, lease, mortgage or otherwise encumber or dispose of all or any part of its property, as provided in this chapter; to contract debts, borrow money and to issue or assume the payment of obligations; to levy and collect reasonable fees, rents, tolls and other charges for service rendered; to perform any and all of the foregoing acts and to do any and all of the foregoing things under, through or by means of its own officers, agents and employees or by contracts with any person, federal agency or municipality.