(A) The City Manager shall, within 60 days after the completion of each local public improvement, compile the actual cost thereof and certify the cost to the Council. When any special assessment roll shall prove insufficient to meet the cost of the improvement for which it was made, the Council may make an additional pro rata assessment; provided, however, that no property shall be assessed in excess of benefits received. No additional assessment for any local public improvement which exceeds 10% of the original assessment shall be made except in accordance with the requirements of Charter, § 9.2(7).
(B) The excess by which any special assessment proves larger than the actual cost of the improvement and expenses incidental thereto may be placed in the General Fund of the city, if such excess is less than 5% of the total amount of the assessment roll, but should the assessment prove larger than the amount by 5% or more, the entire excess shall be refunded on a pro rata basis to the owners of the property assessed. Such refund shall be made by credit against future unpaid installments to the extent such installments then exist and the balance of such refund shall be in cash. No refunds may be made which contravene the provisions of outstanding evidence of indebtedness secured in whole or in part by such special assessment.
(1993 Code, § 54-14)