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The following factors shall be used to determine the classifications of various lands and their constraints to building and development on them.

A. Flood Plain Corridor Lands. Lands with potential stream flow and flood hazard. The following lands are classified as Flood Plain Corridor Lands.

1. All land contained within the 100-year Flood Plain as defined by the Federal Insurance Administration and identified in the Flood Insurance Map (FIRM) adopted by the City Council as provided for in AMC 15.10.

2. All land within the area defined as Flood Plain Corridor Land in maps adopted by the Council as provided for in section 18.3.10.070 Official Maps.

3. All lands which have physical or historical evidence of flooding in the historical past.

4. All areas within 20 feet (horizontal distance) of any stream identified as a Riparian Preservation Creek on the Physical and Environmental Constraints Floodplain Corridor Lands map adopted pursuant to section 18.3.10.070 Official Maps.

5. All areas within ten feet (horizontal distance) of any stream identified as a Land Drainage Corridor on the Physical and Environmental Constraints Floodplain Corridor Lands maps adopted pursuant to section 18.3.10.070 Official Maps.

B. Hillside Lands. Hillside Lands are lands that are subject to damage from erosion and slope failure, and which include areas that are highly visible from other portions of the city. The following lands are classified as Hillside Lands: All areas defined as Hillside Lands on the Physical and Environmental Constraints Hillside Lands and Severe Constraints map and which have a slope of 25 percent or greater.

C. Wildfire Lands. Lands with potential of wildfire. The following lands are classified as Wildfire Lands: All areas defined as wildfire lands on the Physical and Environmental Constraints Wildfire Lands map.

D. Severe Constraint Lands. The following lands are classified as Severe Constraint Lands, which have characteristics that severely limit normal development.

1. All areas that are within the floodway channels, as defined in AMC 15.10.

2. All lands with a slope greater than 35 percent.

E. Classifications Cumulative. The above classifications are cumulative in their effect and, if a parcel of land falls under two or more classifications, it shall be subject to the regulations of each classification. Those restrictions applied shall pertain only to those portions of the land being developed and not necessarily to the whole parcel.

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