YAVAPAI COUNTY PLANNING AND ZONING ORDINANCE Page 63 b. The maximum height of any cut or fill used to establish a building site shall not exceed fifteen feet (15’). The maximum height of any cut or fill used to establish a road shall not exceed thirty feet (30’). All building sites, driveways and roadway cut and fill slopes shall be re-vegetated with native plant material. The fill areas resulting from driveways, roadways and building sites shall be minimized through the use of retaining walls. c. Alternative cut and fill limitations and methods to mitigate the visual impact of cut and fill slopes such as terracing, use of retaining walls and re-vegetation of disturbed areas may be submitted and approved by the Development Services Director or designee based on a finding that the proposed alternative limitations and methods meet the intent of this Section to reduce the visual impact of cut and fill slopes. 8. Maximum Project Size: The Open Space and Sustainable Development Option shall not be utilized for parcels in excess of six hundred forty (640) acres in size. The parcel size shall include the developed residential area and the associated open space area. D. Density Incentives, Conservation Features and Design Elements: The intent of this subsection is to permit density incentives at the sole discretion of the County based on inclusion of the below listed conservation features and design elements. The density incentives listed below shall not be an assumed right and shall only be permitted at the sole discretion of the County based on a finding that the proposed conservation features and design elements are provided at a level and in a manner consistent with the intent and purpose of this Section and advance the County’s interests in promoting sustainable and environmentally compatible development. 1. The maximum density established by Section 441.C.3 may be increased to a value equal to the maximum density multiplied by a factor of 1.5 when nine (9) out of the following twelve (12) County conservation and sustainable design elements are incorporated within the development. 2. Land Development Items a. Shared wells, unless different method of water delivery is required or allowed by applicable County or State law. b. Community sewage treatment facility unless a different method of wastewater disposal is required by applicable County or State law. c. Use of only drought tolerant (Xeriscape) landscaping and prohibition of turf or grass in all common area landscaping. d. Street designs and traffic calming measures throughout the entire development which promote pedestrian safety. e. Enhanced design standards for streetscape throughout the entire development including but not limited to separated sidewalks, separated trails and landscaping. f. Multimodal trails and paths throughout the entire development connecting to adjacent development. g. Open space accessibility to the public and interconnected open space corridors. h. Active recreational facilities such as trails, ball fields, tennis courts, picnic ramadas and outdoor riding arenas.