The council in adopting a method of assessment of the costs of the improvement may:
A. Use any just and reasonable method of determining the extent of any improvement district consistent with the benefits derived;
B. Use any method of apportioning the sum to be assessed that is just and reasonable between the properties determined to be specially affected;
C. Authorize payment by the city of all or any part of the cost of any such improvement when, in the opinion of the council, on account of topographical or physical conditions, unusual or excessive public travel, or other character of the work involved, or when the council otherwise believes the situation warrants it; provided, that the method selected creates a reasonable relation between the benefits derived by the property specially assessed and the benefits derived by the city as a whole.
Nothing herein contained shall preclude the council from using other available means of financing improvements, including federal or state grants-in-aid, sewer service charges or fees, or other types of service charges, revenue bonds, general obligation bonds, or other legal means of finance. In the event any of such other means of finance are used, the council may, in its discretion, levy special assessments according to benefits to cover any part of the costs of the improvement not covered by such means. (Prior code § 2.016)