(a) In addition to the power vested by law in boards of improvement, boards described in § 14-187-101 shall have power to construct and to borrow money with which to construct new and additional improvements necessary, convenient, or required for transfer or interchange of any and all commodities.
(b) The board may issue the notes, bonds, or other evidences of indebtedness of the district to evidence this indebtedness. These obligations shall be negotiable although payable only from a certain fund, and may pledge net revenues arising from the operation of the new and additional improvements, assign any leases or contracts of or concerning the new and additional improvements, and mortgage the new and additional improvements to secure the repayment of the borrowed money and interest on it.