When the Council shall determine the advisability of considering the acquisition, construction or replacement of any improvements or the provision of any public service and paying therefor by a special assessment, the Council shall by resolution direct the preparation of a report to it to include plans and specifications of the proposed acquisition, construction or replacement of any improvements or the provision of any public service, an estimate of the cost thereof and such other information as the Council may direct.
(O.C. § 1.33)