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• Existence of rare plant communities; • Potential need for proactive management and protection. (Ord. No. 67 3rd series,§ 1, 1-11-2010} Sec. 78-1635. -Basic Conservation Design Master Plan requirements and evaluation criteria . The developer shall prepare a Conservation Design Master Plan for development of the property, consisting of written and visual documentation including maps in an acceptable electronic format, addressing the following topics: {l) Consideration of the existing drainage system; (2) Establishment of a stormwater management system, using multi-cell treatment principles, and defining proposed methods of stormwater phosphorus reduction; (3) Removal of invasive species and diseased trees; (4) Protection of significant tree stands and woodlands that support scenic and/or ecological goals, includ ing mitigation of any such sta nds to be impacted by development activities; (5) Protection of existing wetlands, includ ing augmentation of buffers, mitigation of impacts, and enhancement of degraded systems; (6) Just ification and mitigation of any negative impa ct to ecological communities. "Negative impact" includes any modification to a lower level of ecological community quality, as described by the Minnesota Land Cover Classification System (M-34X Modifiers); (7) Maintenance of ecological connections through si te design, as shown on the Orono Natural Resource Inventory; {8) Maintenance and protection of existing positive views, and mitigation of any existing or proposed negative views using appropriate measures such as site layout, screening, building design and coloration, etc.; and {9) Preservation or reinterpre tation of existing landmarks. The p lanning commission and city council shall evaluate the Conservation Design Master Plan to determine whether the proposed development: (1) Preserves existing drainage patterns and enhances stormwater collection and conveyance by app lying an eco logica lly-ba sed multi-cell stormwater managem e nt sys t em that improves ecosystems by reducing reliance on manmade infrastructure, reducing downstream ru noff of contaminants, and enhancing ecological connections; (2) Inc lude s a program for the removal of inva sive species and diseased trees; protects significant tree stands and woodlands that support scenic and/or eco log ica l goals; and includes mitigation of any such stands that will be impacted by development activities; (3) Protects existing wetlands by im plementing new buffers or augmenting existing buffers; mitigates identified wetland impacts; and enhances degraded wetland systems; (4) Results in no negative impact to eco log ica l comm unities of Ecologica l Management Categories 1 and 2; results in no negative modification of any eco logi cal communities as described by the Minnesota Land Cover Classification System; and establishes, maintains and improves native ecologica l communities including natural and semi-natural area s to provide wildlife habitat and support na tu ra l ecological functions (i.e. drainage, filtering, buffering, etc.); (5) Establishes or maintains ecological connections through site design, as shown on the Orono Natural Resource Inventory that will enhance stormwate r collection and conveyance, promote ecological and wildlife corridors, and provide recreational opportunities for re si dents; (6) Preserves and where appropriate augments or improves roadway corridor enc losure to promote community aesthetics associated with the city's rural character; pre serves open rural views and other aesthetic elements of the land scape; and mitigates the negative visual impacts of development; {7) Preserves, maintains, or reinterprets existing landmarks and unique points of loca l character, and preserves distinct cu ltu ra l features that will maintain a familiar sense of place in the community. (Ord. No. 67 3rd ser ies,§ 1, 1-11-2010) DIVISION 3. -DENSITY BONUS STANDARDS Sec. 78-1636. -Density bonuses for urban density development. For residential development in Orono's defined urban area (zoning districts allowing densities in excess of one unit per two acres, and including properties identified in the Orono Community Management Plan for conversion to urban density) within the range s of the gu ided density a density bonus may be allowed if the city council finds that the performance bonus requirements of this division have been met. T h e city council shall det ermine the exte nt of density bonus awarded for such properties. Examp le: Prop erties g uid ed in t he Community Managem ent Pl a n Page 3