The S-1 Slope District is designed to allow proper use of land having a cross slope which exceeds 12% and to prevent encroachment into the district which will unduly increase storm water runoff and damage. Within the S-1 district, the following regulations should apply:
(A) Any slope area, the average cross slope of which exceeds 18%, should be subject to a special use exception which should be in conformity with the applicable comprehensive county or community plan.
(B) Any slope area, the average cross slope of which is less than 12%, should be considered suitable for any uses permitted in an S-1 floodplain and drainageway district.
(C) Any slope area, the average cross-slope of which exceeds 12%, should be considered extremely rugged and the development of this terrain should be limited to compatible uses as follows:
(1) Building lots for one-family detached dwellings;
(2) Utility easements;
(3) Pedestrian easements;
(4) Parks, playgrounds and general community open space.
('74 Code, Appendix A, § 11) Penalty, see § 156.999