1. When the council establishes a district, the council shall appoint a competent disinterested civil engineer, who shall prepare a preliminary plat showing:
- a. The proper design in general outline of the district.
- b. The lots and parcels of land within the proposed district as they appear on the city assessor’s or county auditor’s plat books with the names of the owners.
- c. The assessed valuation of the lots and parcels.