A. Methods: The city council, in adopting a method of assessment of the costs of the improvement, may:
1. Use any just and reasonable method of determining the extent of any improvement district consistent with the benefits derived.
2. Use any method of apportioning the sum to be assessed as is just and reasonable between the properties determined to be specially benefited.
3. Authorize payment by the city of all, or any part of, the cost of any such improvement when, in the opinion of the city council, the topographical or physical conditions, or unusual or excessive public travel, or other character of the work involved warrants only a partial payment or no payment by the benefited property of the costs of the improvement.
B. Alternatives: Nothing contained in this chapter shall preclude the city council from using any other available means of financing improvements, including federal or state grants in aid, sewer charges or fees, revenue bonds, general obligation bonds, or any other legal means of finance. In the event that such other means of financing improvements are used, the city council may, in its discretion, levy special assessments according to the benefits derived to cover any remaining part of the improvement. (1996 Code § 12.08.090)