A. The restoration of a site shall be in accordance with Section 005 of the Grading Design Manual (refer to Chapter 18.81, Grading), the Hillside Development Manual and the additional requirements of this subsection.
B. All slope treatment for subdivision streets shall be completed prior to the release of assurances for the subdivision.
C. All slope treatment and color requirements for residential lots and commercial developments shall be completed and approved by Pima County prior to the request for final inspection.
D. Vegetation retention and revegetation:
1. Vegetation retention and revegetation shall be in accordance with the requirements of this section, the vegetation and revegetation requirements of Chapter 18.72 (Native Plant Preservation), Chapter 18.73 (Landscaping, Buffering, and Screening Standards) and the Hillside Development Manual. In the event of a conflict between the requirements of this section, the Hillside Development Manual, Chapter 18.72 and Chapter 18.73, the most restrictive requirement shall apply.
2. Existing viable trees with four-inch or greater trunk diameter and viable cacti six feet (6') or greater in height shall be preserved in their original locations, except for building locations and associated access, on site septic, and utilities.
3. When retention of the above viable trees and cacti in their original locations is not possible due to building, access, on-site septic and utility locations, trees and cacti with a medium to high rate of transplantability shall be salvaged and transplanted in areas requiring revegetation.
4. Cacti between one foot (1') and less than six feet (6') in height shall be preserved in their original location, except when retention of viable cacti between one foot (1') and less than six feet (6') in height is not possible in their original locations due to site grading and development, cacti with a medium to high rate of transplantability shall be salvaged and transplanted in areas requiring revegetation.
5. All exposed cut or fill slopes and all areas of grading and disturbance that are no steeper than three horizontal to one vertical (3:1) and all utility trenches or septic leaching fields that are not located in parking or driveway areas shall be revegetated. All plants used in revegetation shall be the same genus and species as the native vegetation on the site or any adjacent site prior to grading or clearing, except that plants listed in the buffer overlay zone approved plant list (refer to Chapter 18.67) and low-water use, drought-tolerant ground cover and seed mixes approved by the planning official, may also be used in revegetation. Plant benches and planting areas required by Section 18.61.054G.3 shall be planted in conformance with the revegetation requirements of this subsection.
E. Slope Stabilization. All slopes steeper than a ratio of three horizontal to one vertical (3:1), with the exception of retaining walls, shall be stabilized with properly engineered stone riprapping or sculptured rock as follows:
1. Stone riprapping shall be hand-placed on the slope;
2. The stabilization material used shall blend in with the natural appearance of the site or lot and the surrounding terrain;
3. Vegetation retention and revegetation shall be used in conjunction with riprapping, through the use of planting pockets on the stabilized slope.
(Ord. 2000-52 § 1 (part), 2000)