Sec. 9-4.3106.  Grading control (H-P-D).
   (a)   Land with twenty-five (25%) percent or greater slope shall not be graded except pursuant to an H-P-D permit only where it can be shown that a minimum amount of development is in the spirit of, and compatible with, the purposes and policies set forth in this article.
   (b)   The following table is the minimum percentages of the site’s ground surface which shall remain in a natural state (no cut or fill) or be developed solely for recreational purposes based on the average percent slope of a parcel:
 
Average Percent Slope of Site
Minimum percent of Site to Remain in Natural State (No Cut or Fill) or Be Developed Solely for Recreational Purposes
0.0–14.9%
32.5%
15.0–17.4%
40.0%
17.5–19.9%
47.5%
20.0–22.4%
55.0%
22.5–24.9%
62.5%
25.0–27.4%
70.0%
27.5–29.9%
77.5%
30.0–32.4%
85.0%
32.5–34.9%
92.5%
35.0 and above %
100.00% (except minimum grading for dwelling and driveway areas)
 
   (c)   In order to keep all graded areas and cuts and fills to a minimum, to eliminate unsightly grading, to preserve the property’s natural appearance and beauty as far as possible, and serve the other purposes of this article, specific conditions and requirements shall be placed on the size of the areas to be graded, the size of building footprint, the shape, size, height, and angles of cut and fill slopes. Retaining walls may also be required.
   (d)   Land remaining undeveloped in a natural state or open space or land developed solely for recreational purposes shall be owned and maintained in accordance with the provisions of Section 9-4.3107 of this article.
(§ 1, Ord. 224-NS, eff. September 9, 1971, renumbered by § 11, Ord. 383-NS, eff. July 12, 1973, and amended by § 7, Ord. 899-NS, eff. October 22, 1985)