To provide for the appropriate use of land which has a history of inundation or is determined to be subject to flood hazard, and to promote the general welfare and provide protection from flooding[,] portions of certain districts are designated with a Flood Plain Prefix, FP. Areas designated on the Zoning District Map by an FP Prefix shall be subject to the following provisions:

The permitted uses in that portion of any district having a Flood Plain, FP prefix shall be limited to the following:

No building or structure shall be erected in that portion of any district designated with a Flood Plain, FP, prefix until and unless such building or structure has been approved by the City Council after engineering studies have been made and [it] is ascertained that such building or structure is not subject to damage by flooding and would not constitute an encroachment, hazard, or obstacle to the movement of flood waters and that such construction would not endanger the value and safety of other property or the public health and welfare.

Any dump, excavation, storage, filling or mining operation within that portion of a district having a Flood Plain, FP, prefix shall be approved in writing by the City Manager [Administrator] or his designated representative before such operation is begun.

An area may be removed from the Flood Plain, FP, prefix designation when by the provision of drainage works, grading, flood protection, or specific drainage study, it is determined by the city’s engineer, the City Council by resolution may remove, alter or change the flood plain boundary on the Zoning District Map for any district.

The fact that land is not within a district having a Flood Plain, FP, prefix shall not be interpreted as assurance that such land or area is not subject to periodic local flooding and the designation of the prefix in this ordinance shall not be so interpreted.