2. Riparian Buffers . Areas designated as a Neuse River Basin riparian buffers (blue line streams on USGS maps or Wake County soil/topographic maps designating perennial streams).
C. Historic/Archaeological Areas . Historic and archaeological sites listed on the National Register of Historic Places, or included on the State's National Register Study List, or Wake County Historic Preservation Register, designated as a Local Historic Landmark, a Local Historic District, and/or identified as having a high potential for archaeological remains and determined by one (1) of the following:
i. Professional Analysis . An independent site study conducted by trained architectural historian or archaeologist.
ii. Historical or Archaeological Site . When an historical or archaeological site is set aside as a separate lot and preserved and/or restored as part of the Planned Unit Development, the entire area may count toward the minimum open space standard. (3) Secondary Open Space Areas . Secondary areas may comprise of any of the following open space uses and receive full credit toward meeting the proposed minimum open space standard, unless otherwise specified in the Land Development Ordinance:
A. Forest . Upland forest consisting of hardwood, pine or combination of mixed pine and hardwood forest determined by one (1) of the following:
i. Professional Analysis . A site analysis conducted by a registered engineer, land surveyor, landscape architect, architect or land planner using aerial and/or satellite imagery.
ii. Botanist or Similar Profession . An independent site study conducted by a trained botanist, forester, or arborist.
B. Farmland . Farmland, including prime agricultural land which is in active use for the production of crops and/or raising of livestock and fallow fields.
i. Natural Slopes Greater than or Equal to 15% . Natural slopes of 15% or greater but less than 25%, which require special site planning due to
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