To verify the average slope of the land falling under the Steep Slope Ordinance determination, the subdivider shall obtain a professional survey and apply the procedures set forth in the Appendix following this chapter.
(A) Contour map required. Each application for a development which meets the standards set forth in the steep slope definition shall include a contour map which includes a scale and contour interval on the site plan to determine the average slope of a lot, parcel, plot, or tract of land in its natural state.
(B) Calculation of natural average slope. The natural average slope is calculated using the following formula:
S= 0.0023 x I x L/A
Where:
S = Average natural slope of parcel in percent
I = Contour interval of map in feet, with said contour intervals to be five feet or less
L = Total length of the contour lines within the parcel in feet
A = Area of the parcel in acres
0.0023 = Constant which converts square feet into acres
Once "S" or the average natural percent is calculated and rounded off to the nearest whole number, that number shall be used to determine development requirements.
(Ord. passed 10-16-2007)