Where land proposed for subdivision is deemed environmentally sensitive by the city,
due to the existence of wetlands, drainage ways, watercourses, floodable areas or
steep slopes, the design of said subdivision shall clearly reflect all necessary measures
of protection to insure against adverse environmental impact. Based upon the necessity
to control and maintain certain sensitive areas, the city shall determine whether
said protection will be accomplished through lot enlargement and redesign or dedication
of those sensitive areas in the form of protection shall include design solutions
which allow for construction and grading involving a minimum of alteration to sensitive
areas. Where these areas are to be incorporated into lots within the proposed subdivision,
the subdivider shall be required to demonstrate that the proposed design will not
require construction on slopes over fifteen (15) percent, or result in significant
alteration to the natural drainage system such that adverse impacts cannot be contained
within the plat boundary.