Conservation of site features. The overall plan for development of a tract or lot shall be based upon a thorough analysis of the unique natural features, hydrologic characteristics, topography, soils, scenic views, and historic sites and buildings found on the tract, such analysis undertaken by professional(s) with demonstrated expertise in the relevant field(s). The overall plan for development shall meet the following conservation objectives to the maximum extent practicable. It shall be presumed in each case that full conservation is practicable, except to the extent that the applicant has demonstrated to the satisfaction of the Board of Supervisors, based upon a preponderance of evidence, that full conservation is not practicable. In situations where a different type or mix of dwelling unit(s) or the use of smaller lots is available to the applicant and could be designed in a manner that would make full conservation or conservation of most features practicable, then the applicant shall achieve such conservation by using such type or mix of dwelling units or smaller lot sizes or shall otherwise adjust the design or unit count (e.g., reduce unit count) so as to achieve an equal measure of conservation. If serious compromise of Township conservation objectives would appear to result from any permissible development scenario, the applicant shall be encouraged to sell or transfer development rights to another parcel. Where approved by the Board of Supervisors as a conditional use, and after the use of alternative development scenarios has been proven impracticable, the Board may modify applicability of one or more conservation objectives when satisfied that applicable development plans shall result in the greatest practicable degree of conservation overall.
(1) Avoid disturbance to woodlands, tree groupings, and single trees as per § 250-87C(1) and (2) of this chapter.
(2) Preserve unique natural and geological areas including areas of outstanding botanical importance such as Pennsylvania Natural Diversity Inventory sites and others identified in the Pocopson Township Open Space, Recreation and Environmental Resources Study or other natural areas map as may be adopted by the Township.
(3) In addition to those cases where preservation is specifically required under bonus provisions or for specific types of development, preserve the structural and visual integrity of historic buildings or sites identified on the Township Historic Resources Map by incorporating their preservation into development plans and by maintaining a buffer zone free of new buildings and roads of at least 150 feet around such buildings found on the site and a minimum of 250 feet from an historic building on an adjoining property. Applicants are encouraged to provide restricted open space around such buildings or sites.
(4) Preserve streams and drainage ways in their existing state except as may be required to provide for fire protection. Provide riparian buffer plantings to stabilize stream banks and improve water quality.
(5) Preserve the existing topography to the maximum extent practicable and provide for permanent restrictions against land disturbance for all slopes exceeding 25% that encompass an area of 25,000 SF or more and all wetlands (see also §
250-87 of this chapter).
(6) To the maximum extent practicable, buildings shall be sited outside the scenic river corridors of the Pocopson and Brandywine Creeks, outside direct view from scenic road corridors (Routes 52 and 842 and Lenape-Unionville, Corinne, Wawaset, Red Lion, Locust Grove, Bragg Hill, Denton Hollow, and Davidson Roads) as indicated by the locations of "visually significant landscapes" in the Pocopson Township Open Space, Recreation and Environmental Resources Plan, and below ridgelines throughout the Township. Where building siting outside of such public viewsheds is not practicable, even through permitted alteration of development scenario(s) as described in Subsection
C(9), the degree of intrusion into public viewsheds shall be substantially reduced through reduction of building heights or visible profiles, through design of the layout of the development, through incorporation of other mitigative design approaches, through architectural treatment and landscape design, or an acceptable combination of such mitigative measures.
(7) A fracture trace analysis shall be conducted for all developments of three or more lots with lot sizes of less than two net acres. Such analysis shall be used to plan for the location of wells and wastewater disposal and stormwater recharge facilities. Subsurface wastewater disposal fields, wastewater treatment facilities, and stormwater detention or recharge facilities shall be located no closer than 25 feet from any fracture.