Background Report - Town of Georgina

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Sutton Secondary Plan Review Study May 2008 Existing Environmental Conditions and Opportunities/Constraints Analysis Project No. TA4468 Level 1: Provincially Significant. No Development Intrusion. Criteria: • PSW’s • Woodlands > 25 ha • Significant Habitat of Endangered and Threatened Species Level 2: Provincially Significant. No Development Intrusion. Criteria: • All non-evaluated wetlands > 10 ha • Any wetland contiguous with evaluated non-PSW’s where the total area > 10 ha • Unevaluated wetlands contiguous with PSW’s • Woodlands >10 ha and < 25 ha • Significant Valleylands • Core Winter Deer Yards • Colonial waterbird nesting sites • Rare vegetation communities • Provincial Life Science ANSI’s Level 3: Watershed Significant. No Development Intrusion. Criteria: • Evaluated non-PSW’s and designated Locally Significant Wetlands • Watercourses, water bodies, drains, on-line ponds and mapped off-line ponds within 30 m of another NHS feature (habitat for fish) • Regional Life Science ANSI’s • Woodlands > 0.5 ha and 0.5 ha that overlap or within or are within 30 m of less of any identified Level 1, 2 or 3 NHS feature • Woodlands > 4 ha and
Sutton Secondary Plan Review Study May 2008 Existing Environmental Conditions and Opportunities/Constraints Analysis Project No. TA4468 • Stream linkages (minimum 30 m from creek) between Level 1, 2 and/or 3 features (or continuous Level 4 – supporting feature) • Proximity Linkages between Level 1, 2 and/or 3 features (or continuous Level 4 – supporting feature) Existing built-up urban areas within the study area, agricultural land and cultural/successional features such as meadows, thickets, plantations, hedgerows and regenerating woodlands are considered to pose a low constraint to development, relative to the Level 1, 2 and 3 natural heritage features described above. Supporting natural areas (Level 4) such as small, isolated wetland/woodland blocks ( 10-15 ha) however may provide important ecological functions at a local or landscape scale such as: • specialized habitat for plant and wildlife species of concern; • linkage connection between natural areas for species dispersal; • buffer to sensitive terrestrial, wetland or aquatic habitats; and, • long-term increase in woodland/forest cover through natural succession. The ecological importance of supporting natural areas within the Sutton Secondary Plan area should be evaluated at the draft plan stage (through an EIS) to confirm opportunities/constraints to development and to identify appropriate mitigation measures, including avoidance (where appropriate), buffers/setbacks, and on-site/off-site habitat compensation. Recommended setbacks/buffers from Level 1, 2 and 3 Natural Heritage Features are as follows: • 15 m from Regulatory Floodplain , meander belt width or stable top of bank; • 15 m setback from a warm water stream channel; • 30 m setback from a cold water stream channel; • 30 m wetland buffer (both PSW and LSW); and, • dripline plus 30 m from significant woodlot/wetland vegetation. LGL Limited environmental research associates Page 15
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Background Report - Town of Georgina

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