B2.A Ecological impact


    Objectives

  • To avoid and minimise impacts on the natural environment.

      Controls

      B2.1 Development should be designed to avoid impacts on high value ecological features, minimise any unavoidable impacts, and where applicable implement compensatory measures in accordance with sub-chapter B2.B.

      B2.2 Buffers should be provided between the development and areas containing high value ecological features.

      Buffers to mitigate ecological impact

      A buffer is a designated area intended to separate or mitigate potential conflicts or negative impacts between different land uses, activities or areas. These conflicts or negative impacts are often referred to as indirect impacts and include things like noise and light spill as well as weed incursion caused by edge effects.

      It is important to note that buffer requirements are variable and the size of the buffer will depend on the likely extent of the potential indirect impacts a development may have, as well as specific requirements of the threatened entity that may be impacted. For example, under the NSW Biodiversity Assessment Method 2020, a 30m buffer is applied around threatened plants, whereas guidance for Powerful Owls require that a buffer of at least 200m is retained around known nesting sites.

      B2.3 Development provides the following buffers to riparian corridors that are generally consistent with the recommendations of the NSW Office of Water 2012, 'Guidelines for riparian corridors on waterfront land’:

      Riparian corridors

      Riparian corridors can provide a range of valuable environmental functions such as:

      • improving water quality and bank stability,
      • providing habitat and connectivity for flora and fauna,
      • providing a buffer between developments and waterways, and
      • provide nutrient uptake opportunities prior to runoff entering waterways.


      B2.4 Development should consider biodiversity corridors and not compromise the potential for safe movement of fauna, (including Koala) across the site. This should include maximising tree retention generally and minimising the likelihood that the proposal would result in the creation of barriers to Koala movement. Reference should be made to any relevant guidelines.


      Biodiversity corridors

      The DASH provides specific information regarding planning for biodiversity corridors.

      B2.5 Buildings and structures, roads, driveways, fences, dams, infrastructure, drainage and asset protection zones are located to avoid areas with significant flora and fauna or ecological communities, buffers, biodiversity or riparian corridors, environmentally sensitive land and land with high value ecological features.

      B2.6 The width of any retained or proposed buffer, biodiversity corridor, or riparian corridor should be determined having regard to the function of the habitat or corridor and the type of development proposed. The width of the corridors or buffers may be narrowed in one part of the site if similarly widened in another. Depending on the function of the corridor or buffer and the type of development proposed, it may be possible to co-locate some infrastructure. Designs that result in improved environmental outcomes will be supported.

      B2.7 A subdivision development application must include consideration of the total clearing that is required or likely to be required for the purpose for which the land is to be subdivided. If the purpose of the subdivision is urban residential development (i.e. land zoned R2 and R3), the assessment report should assume that lots will be entirely cleared.

      Consideration of total clearing

      Consideration of total clearing for subdivision applications on land zoned other than R2 and R3 will include identifying building envelopes, bushfire asset protection zones, access roads, driveways, services, effluent disposal areas, ancillary buildings and new boundary fence lines.

      B2.8 Where a development is adjacent to an area of threatened fauna habitat (including Koala and migratory shorebirds), any outdoor lighting (including street lighting) must be prepared in accordance with Council's Biodiversity Technical Specification.

      B2.9 Where a development is adjacent to an area of threatened fauna habitat (including Koalas), perimeter fencing may be required that is either designed to exclude fauna (where a development poses a risk to fauna from vehicle strike, dog attack or similar) or is fauna-friendly (where connectivity through the site is important to maintain for habitat linkage), in accordance with Council’s Biodiversity Technical Specification. Fauna escape or crossing structures may also be required.

      B2.10 Where high value ecological features are required to be retained on site, they must be protected and managed.