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are limited to a of 24 feet for residential and 30 feet for nonresidential or the maximum height permitted by the underlying , whichever is more restrictive. If the is also located within the boundaries of other overlay , the most restrictive of the standards shall apply. (See Figure 5.2-E.)
B. Improvement Standard
All proposed work, including , shall comply with the Section 2-01, Excavating and , of the Technical Standards Manual and the following standards:
subject to the provisions of the HDZ ordinance shall have a plan approved by the City Engineer or designee. Review of a plan may occur concurrently with the review of the , , or base plan. All shall meet the following standards:
(1) The portions of the to be graded must be shown on a or plan and by staking on the . A -approved plan is required prior to any grubbing, , or clearing. Grubbing, , and clearing shall occur only within the areas identified on the plan and staked on the or ; and,
(2) The portions of the to be left ungraded shall remain undisturbed and shall not be used for stockpiling of materials or excess , construction vehicle access, storage of vehicles during construction, or similar uses. If natural areas are designated on a or , temporary fencing, as approved and Inspected by the City Engineer or designee, shall be installed prior to construction where they abut construction areas in order to prevent encroachment into the natural areas.
b. and Fill
The following are required of and :
(1) The maximum amount of shall not exceed 30 feet;
(2) The uppermost point of an shall be no higher than 15 feet above ;
(3) The uppermost point of a nonexposed shall be no higher than the highest point of any set into the , provided that:
(a) This shall be concealed from view by a method such as backfilling; and,
(b) The backfilled area must be revegetated in accordance with Section 5.2.7.B.2.b.
(4) The vertical distance of exposed and/or exposed retaining material shall not exceed 15 feet;
(5) and shall either be revegetated or protected by constructed means, such as riprapping or retaining walls; and,
(6) or that encroach into a floodplain require City Engineer or designee approval.
2. Vegetation Retention and
a. Vegetation Retention
(1) Existing viable and transplantable trees with four inch or greater trunk diameter and cacti shall be preserved in their original locations, except for and access and serving .
(2) When retention of the above trees and cacti in their original locations is not possible due to location, the trees and cacti shall be salvaged and replanted in areas requiring , whenever possible.
All or that are no steeper than three horizontal to one vertical and all utility trenches or septic leaching fields that are not located in parking or areas shall be revegetated in compliance with the following standards:
(1) All plants used in shall be the same as the on the prior to or clearing or any ; and,
(2) shall be accomplished with the following minimum standards for plants:
(a) Desert trees, a minimum of 15-gallon size with a minimum trunk diameter of two inches measured at the soil level, or large specimen cactus shall be placed at the same vegetation found on the prior to any clearing, grubbing, or ; and,
(b) Seeds for trees, desert shrubs, and grasses shall be planted with a adequate to control and may use one of the following methods of planting: Raked into the soil with appropriate mulch materials; hydroseeding; anchored mulches; or established on jute, rolled straw, or similar material. Another method may be approved by PDSD.
(3) A temporary watering system shall be installed until the materials are established.
All steeper than a ratio of three horizontal to one vertical, with the exception of retaining walls, shall be stabilized with properly engineered stone riprapping or sculptured rock as follows:
a. Stone riprapping shall be hand-placed on the ;
b. The stabilizing material used shall blend with the natural appearance of the or and the surrounding terrain; and,
c. Vegetation retention and should be used in conjunction with riprapping.
All exposed exterior walls and roofs of , retaining walls, and , except satellite dishes, shall be earth tone in color and shall blend with the predominant natural colors found on the or . Satellite dishes may be black. White is not permitted.