(A) Slope calculation. Density will be based upon the average slope percentage. For the purpose of determining the average slope percentage of a property in the HR- PD zone, the average slope of a parcel of land or any portion thereof must be calculated by applying the formula
S = 0.00229 IL
A
to the natural slope of the land before any grading. Such slope must be determined from a topographic map conforming to national mapping standards and having a scale of not less than 1 inch equals 200 feet and a contour interval of not less than five feet. The letters in the slope formula have the following meanings:
S = average slope percentage
I = contour interval, in feet
L = summation of length of contours, in feet
A = area in acres of parcel being considered.
(B) Density restrictions. The maximum permitted density on a lot will be based upon the average slope percentage and will be restricted as follows:
Slope | Maximum Density |
10-14.9 | 3.0 du/ac |
15-19.9 | 2.5 du/ac |
20-24.9 | 2.0 du/ac |
25-29.9 | 1.5 du/ac |
30 and over | 0.0 du/ac |
(C) Greater density permitted. Where the average slope percentage is less than 10%, the City Council may allow a maximum density of four units per gross acre for an entire subdivision or development project.
(Ord. 1100, passed 7-6-04)