87.1120 Hillside Classifications. — Yucaipa Zoning Code

(a) Hillside classifications have been determined to identify significant categories relative to hillside development. These categories have been classified in terms of landform types with respect to different slope categories, as follows:

Slope 0 - 6% 6.1 - 15% 15.1 - 20% 20.1 - 30% 30.1 - 40% 40.1% +	Landform Type Flat Gentle, Rolling Land Hillside Steep Hillside Mountainous Rugged Mountain

(b) Slopes of 0—6% are essentially flat land, normally posing no major restrictions to development, except in terms of landscaping and maintenance for the small amounts of slopes created. Slopes of 6.1—15% are not suitable for freeways and major arterials, but flexible as to local road orientation and site layout. There are generally no significant constraints associated with this category, but it is more restrictive than flat land. Development in areas with slopes of 15.1% and above shall require Hillside Development Review. Hillsides of 15.1—20% slope are significantly affected in terms of read alignment in that roads will normally be required to parallel contours. More significant grading is required to create flat pad areas, and the orientation of site planning, such as orienting pads parallel to contours to avoid significant side splits or a saw tooth effect on graded pads, begins to be restricted in terms of access and the ability to grade flat sites. In steep hillside areas of 20.1—30% slope, the required quantities of earthwork necessary for grading to create flat pads increases dramatically, as does the significance of view opportunities and visual prominence. In mountainous areas with slopes of 30.1—40%, both access and the ability to create pads using 2:1 slopes are severely restricted. Flat areas and roads are difficult to create, making access a problem. In rugged mountain areas with slopes of 40.1% or greater, development is prohibited. Without the use of retaining walls, access is very difficult and the grading of pads on side slopes of 40.1% or greater is virtually impossible without massive grading that would involve cutting hilltop areas and filling the valleys. (Amended by Ord. 313 § 4, 2011)

87.1125 Ridgeline Preservation.

(a) Any Tentative Parcel Map or Tentative Tract Map in the vicinity of or affecting ridgeline areas shall be required to perform a view analysis depicting before and after conditions. Views from a minimum of three (3) selected vantage points showing a precise depiction of the potential visual impacts of the proposal shall be presented to the Planning Commission. The technology may incorporate the use of a three-dimensional computer model or photographs incorporating a height reference (either reference poles or chalk lines) of the proposed development in order to display the impact of development on ridgeline views.

(b) Alternatives which staff may require for ridgeline preservation are:
(1) No structure shall be permitted within a 150-foot horizontal distance from the centerline of prominent ridgelines and no finished pad will be allowed within 50 feet of the top elevation of the ridge.
(2) Identify contour elevation on each of the prominent ridgelines above which no development will occur.
(3) From existing foothill areas to prominent ridgelines, the project will maintain 50% of existing view to prominent ridgelines from selected vantage points.
(4) Determine preservation areas within which development will be prohibited.