Average slope of an area shall be determined by the use of computer software or by using the following formula:
S = (I x L x 0.00229) / A
S = | Average percent slope of the area | |
A = | Size of the area in acres (horizontal projection) | |
L = | Summation of the length of all contour lines in feet | |
I = | Contour interval in feet | |
0.00229 | is a factor that converts square feet to acres |
(Ord. 09-03, 8-11-2009)