(1) There shall be no grading on or to any site other than percolation and test borings (100 square feet maximum in size) prior to the issuance of a Zoning Clearance and a Building Permit.
(2) During the construction period, the disturbed area shown on the approved site plan shall be cordoned off with a temporary chain link fence a minimum of six (6) feet in height.
(A) All construction sites must make all reasonable efforts to prevent or control blowing dust and debris. (Ord. #2015-02)
(B) In the case of site grading and other construction operations, all reasonable efforts shall be made to control blowing dust and debris onto adjacent properties. (Ord. #2015-02)
(C) When grading operations involve the hauling of dirt from one site to another, maintain public and/or private streets in a clean condition and limit any spillage which would generate dust or other blowing debris. (Ord. #2015-02)
(D) The approval of a dust prevention and control plan does not relieve the owner or contractor of the responsibility to implement whatever additional measures may be required to property prevent and control dust. (Ord. #2015-02)
(3) The total area of grading shall at no time exceed the maximum allowed disturbed area as set forth in the table of intensity schedule/development regulations in Article VI, Section 6.01 of this Ordinance. The following items shall be counted towards the disturbed area:
(A) Any area enclosed by a solid masonry wall.
(B) Any area disturbed by the development of a driveway and associated infrastructure.
(C) Any area disturbed by corrals, stables, the keeping of horses, tennis courts, sports courts, and other accessory structures.
(4) Grading shall not disturb or obscure significant visual or environmental features of the site including boulders, rock outcroppings, archeological sites (as defined by either the state or a professional archeologist), and/or washes that have a 100 year flow of 50 cubic feet per second or greater.
(A) The historical entrance and exit points and hydraulic properties of all natural drainage channels on a site shall be preserved in their natural conditions.
(B) Any disturbance of boulder features on slopes greater than ten (10) percent shall be supported by a geological analysis to ensure against any potential inadvertent movement of the boulders during and after construction. The Development Review Board shall approve such modifications of boulder features.
(5) Grading or disturbance of natural terrain for the purpose of installing a sewage disposal system shall be limited to seven (7) feet outside of the edge of the sanitary infrastructure including, but not limited to, the leaching bed or pits, tank and distribution box, and connecting lines as required by the Maricopa County Health Department.
(6) All utility lines shall be located underground and whenever possible within the driveway graded area. If this location is not feasible, then disturbance of natural terrain for these utility line trenches shall be confined to within four (4) feet of either side of the trenches. The restoration and revegetation plans for these disturbed areas shall be approved by the Development Review Board.
(7) Cut and fill slopes shall not typically exceed a slope of 3 to 1 with a maximum vertical measurement of four (4) feet. Spill slopes are prohibited.
(A) Where a greater height is necessary, cut and fill slopes shall be contained by retaining walls unless:
1) A licensed geologist determines through an analysis that the slope is stable.
2) The slope is treated with an aging agent to restore it to a natural appearance.
(B) The maximum height of a cut and/or retaining wall for a building pad shall not exceed twelve (12) feet from natural grade and the building shall screen the cut and/or retaining wall from view (see Figure 9.4).
(C) The quantity of fill material shall not exceed the quantity of cut material, unless otherwise approved by the Development Review Board (see Figure 9.5). All excess cut material shall be removed from the site.
(D) All cut and fill shall be constructed in a way to ensure they are non-erosive.
(8) All retention/detention basins shall consist of vertically and horizontally undulating banks with side slopes having less than a 4 to 1 ratio.
(9) Floodplain(s) containing a 24 hour, 100-year storm event discharge of 50 cubic feet per second or greater shall be delineated on all development plans and shall illustrate appropriate erosion setbacks.
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