Manly Lagoon Dredging Project - Manly Council - NSW Government

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Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah Councils7 Conclusions7.1 Summary of Consideration of Environmental FactorsThe factors listed in the EPBC Act (Commonwealth Legislation) and under Clause 228(2) ofthe EP&A Regulation (NSW Legislation) have been addressed in Tables 7.1 and 7.2,respectively, to ensure that the likely impacts of the proposal on the natural and builtenvironment are fully considered.Table 7.1: Summary of Consideration of Environmental Factors (Commonwealth Legislation)Environmental Factors (Commonwealth Legislation)a. Any environmental impact on a World Heritage property?A search of the EPBC Database on 9 July 2009 (6 square kilometre area) indicated thatthere were no World Heritage Properties in the area.ImpactsNilb. Any environmental impact on wetlands of international importance?The search of the EPBC Database indicated that there were no Wetlands ofInternational Significance in the area.Nilc. Any environmental impact on Commonwealth listed threatened species orecological communities?The search of the EPBC Database indicated that 31 Commonwealth listed threatenedspecies may occur in the overall area. The terrestrial field survey in January 2010 didnot identify any plants or fauna species listed as threatened under the EPBC Act in theworks area (Warringah Council, 2010; Appendix N).There are two EECs located along the lagoon banks (see Section 5.4.1). However, theproposed works will not affect these EECs, providing appropriate mitigation measuresare employed.NilDue to the relatively confined nature of the dredging works and the extensivemodification that has taken place along the lagoon foreshore, it is unlikely that theworks will impact on any threatened flora, fauna or fauna, or their habitat.d. Any environmental impact on Commonwealth listed migratory species?The search of the EPBC Database indicated that 33 Commonwealth listed migratoryspecies may occur in the overall area. However, the terrestrial field survey in January2010 only identified two migratory bird species listed under the EPBC Act in the worksarea (Warringah Council, 2010; Appendix N).Temporary disruption to migratory species that utilise Manly Lagoon is likely to occurduring the proposed works due to the noise and presence of machinery within the waterway; however, due to the relatively short duration of dredging works (30 days) within thelagoon, these impacts will only be short term and reversible.e. Does any part of the proposal involve a nuclear action?No.Minorshort term-veNil2 July 2010 Cardno (NSW/ACT) Pty Ltd 124H:\Doc\2010\Reports.2010\Rep2580v4.doc
Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah CouncilsEnvironmental Factors (Commonwealth Legislation)f. Any environmental impact on a Commonwealth marine area?The search of the EPBC Database indicated that there were no Commonwealth MarineAreas in the works vicinity.ImpactsNilg. Any direct or indirect effect on Commonwealth land?The search of the EPBC Database indicated that there were two Commonwealth Landsin the overall area. The Commonwealth Lands were listed as:Communications, Information Technology and the Arts – Australian PostalCorporation; andDefence.NilIt is not considered that the proposed works will impact on either of these parcels ofCommonwealth Land.Table 7.2: Summary of Consideration of Environmental Factors (State Legislation)Environmental Factors (State Legislation)a. Any environmental impact on a community?The proposed works will impact negatively on the local community surrounding ManlyLagoon in the short term due to noise, vibration and visual impacts. However, theseimpacts will only be temporary.However, in the long term the proposed works would have a positive impact on thelocal community via maintaining an open channel within the lagoon, and allowingimproved tidal exchange.b. Any transformation of a locality?The proposed works will not transform the locality of the area to any significant extent.ImpactsMinorshort term-veLong term+veNilc. Any environmental impact on the ecosystems of the locality?Removal of accumulated sediments in the lagoon is expected to increase tidal mixingand water quality.d. Any reduction of the aesthetic, recreational, scientific or other environmentalquality or value of a locality?There may be some minor reductions in aesthetic quality during the proposed dredgingworks period, due to machinery, works signage and fencing. However, these minornegative impacts are short term and no long term reductions to the aesthetic,recreational, scientific or environmental values are anticipated.e. Any effect on a locality, place or building having aesthetic, anthropological,archaeological, architectural, cultural, historical, scientific or social significanceor other special value for present or future generations?+veMinorshort term-veNilNo, none identified.2 July 2010 Cardno (NSW/ACT) Pty Ltd 125H:\Doc\2010\Reports.2010\Rep2580v4.doc
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Manly Lagoon Dredging Project - Manly Council - NSW Government

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