Terrestrial Ecology and Nature Conservation: Comparison of 2007 and 2011 Reference Designs and Summary of Effects Location Residual Effect Potential Effects of Additional Residual Effect from 2007 2011 Reference Mitigation Required from 2011 Reference Design Design Reference Design Very large adverse Mitigation as for Success of PBP, including Effects are as those to Large adverse 2008 ES but with mitigation is Eastern Plateau, stated for the 2008 depending on scale modifications uncertain. Therefore site for the main ES but with a of land-take for reflecting the assessed as being airport, the reduced amount of construction and changes in design. between Large Central Basin and land take and success of Adverse to Dry Gut potentially greater mitigation. Moderate adverse protection from wind. depending on Potentially a Very success of mitigation large adverse impact Valley Further assessment Not assessed Potentially a Large There is a level of Fisher’s of the effects of adverse impact but uncertainty with Key Sub- ground water this could change in regards full abstraction on the light of full understanding of the stream flow is wetland habitat information. impacts on stream needed. for indigenous flow and the Moorhen, plants ecological structure A mitigation strategy and invertebrates and function of the will need to be put in and the Wirebird wetland. place to maintain the nature conservation Ecological Ecological impacts value of the area as Interest a wetland. at Fishers are considered High therefore assessed value as being between Major adverse to minor adverse depending on full information and success of mitigation. Access works not Sharks Valley/ Access works None required. No Effect assessed as Woody Ridge removed from having significant reference design effects. Minor Adverse
Terrestrial Ecology and Nature Conservation: Comparison of 2007 and 2011 Reference Designs and Summary of Effects Location Residual Effect from 2007 Reference Design Potential Effects of 2011 Reference Design Additional Mitigation Required Residual Effect from 2011 Reference Design PBP, including Eastern Plateau, site for the main airport, the Central Basin and Dry Gut Very large adverse to Large adverse depending on scale of land-take for construction and success of mitigation. Effects are as those stated for the 2008 ES but with a reduced amount of land take and potentially greater protection from wind. Potentially a Very large adverse impact Mitigation as for 2008 ES but with modifications reflecting the changes in design. Success of mitigation is uncertain. Therefore assessed as being between Large Adverse to Moderate adverse depending on success of mitigation Fisher’s Valley Key wetland habitat for indigenous Moorhen, plants and invertebrates and the Wirebird Ecological Interest considered High value Not assessed Potentially a Large adverse impact but this could change in the light of full information. Further assessment of the effects of ground water abstraction on stream flow is needed. A mitigation strategy will need to be put in place to maintain the nature conservation value of the area as a wetland. There is a level of uncertainty with regards full understanding of the impacts on stream flow and the ecological structure and function of the wetland. Ecological impacts at Fishers are therefore assessed as being between Major adverse to minor adverse depending on full information and success of mitigation. Sharks Valley/ Woody Ridge Access works not assessed as having significant effects. Minor Adverse Access works removed from reference design None required. No Effect Sub-
Addendum-to-Environmental-Statement-2011.docx