A. Grading or development shall not be permitted within the legally described boundaries of a natural area except as follows:
1. If utility or sewer trenches cannot reasonably be provided without crossing natural areas of the project site, such trenches may be permitted, provided they are revegetated in accordance with Section 18.61.055.
2. Development within previously disturbed parts of a natural area for the purposes of plant enhancement and mitigation is permitted in conformance with the natural area mitigation provisions in Section 18.61.055.D.5.
B. Natural areas are to be established as large contiguous areas, rather than small, disconnected areas scattered over the site. Natural areas are permanent, once established and recorded.
C. Natural areas shall be surveyed and clearly delineated in a surveyable manner on all final plats, development plans, and grading plans submitted with building permit applications, and shall be sealed by a registered land surveyor. Natural areas shall be clearly labeled "HDZ Natural Area" on final plats, development plans and grading plans, and the plat or survey shall be recorded.
D. Natural areas shall be incorporated into a subdivision plat as either a portion of privately owned lots or as land parcels under the ownership of a homeowners' association. Where natural areas are located adjacent to major public parks, such areas may be deeded to Pima County, subject to approval by the county parks and recreation department and acceptance by the board of supervisors.
E. Land parcels which include a natural area designation shall not be further divided.
(Ord. 2000-52 § 1 (part), 2000)