The commissioners may:
(1) borrow money, not exceeding the amount of assessment for the cost of construction and additional assessments, as provided in 85-8-367 and 85-8-368, unpaid at the time of borrowing, for the construction or repair of any work which they shall be authorized to construct or repair or for the payment of any indebtedness which they may have lawfully incurred; and
(2) issue notes or negotiable coupon bonds on the district, bearing interest, payable semiannually and not running beyond 1 year after the payment of the last installment of the assessment, on account of which money is borrowed, shall fall due.