Manly Lagoon Dredging Project - Manly Council - NSW Government

Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah CouncilsTable 5.9: Potential Threatened Fauna at Manly Lagoon (Sources: NPWS Wildlife Atlas; BioNet;EPBC Database) ................................................................................................................................... 83Table 5.10: Potential Migratory Species Listed as Matters of NES at Manly Lagoon (Source: EPBCDatabase) .............................................................................................................................................. 89Table 5.11: Potential Listed Marine Species under the EPBC Act at Manly Lagoon (Source: EPBCDatabase) .............................................................................................................................................. 90Table 5.12: Items of Heritage Proximal to the Proposed Works (Sources: DECC, 2009b; DoP, 2009c).............................................................................................................................................................. 99Table 5.13: Examples of Types of Vibration (After: DEC, 2006) ........................................................ 103Table 5.14: Acceptable Vibration Dose Values for Intermittent Vibration during the Daytime (7am-10pm) (After: DEC, 2006) ................................................................................................................... 103Table 5.15: Major Projects in the Manly and Warringah LGAs (Source: DoP, 2009b) ....................... 114Table 6.1: Summary of Environmental Mitigation Measures for the Proposed Works ....................... 115Table 7.1: Summary of Consideration of Environmental Factors (Commonwealth Legislation) ........ 124Table 7.2: Summary of Consideration of Environmental Factors (State Legislation) ......................... 125List of FiguresFigure 1.1: Locality Map and LGA Boundaries (After: DEWHA, 2009)................................................... 2Figure 1.2: Locality Plan (After: Patterson Britton and Partners, 2003b) ................................................ 4Figure 2.1: Location / Extent of Proposed Dredging Works (Sources: Manly Council GIS & GoogleMaps) .................................................................................................................................................... 10Figure 2.2: Examples of Geotextile Tubes Dewatering Sediments (Left / Right Panel Sources: Geo-Synthetics, 2009 / US Fabrics, 2009) ................................................................................................... 14Figure 5.1: Acid Sulfate Soils Risk Map for Proposed Works Site (After: Natural Resource Atlas, 2009).............................................................................................................................................................. 44Figure 5.2: EPA Contaminated Land Site – Former Landfill, Adjacent to Manly Lagoon (After: ManlyCouncil GIS) .......................................................................................................................................... 46Figure 5.3: Wind Roses (9am) for Sydney (Observatory Hill), Site Number 066062 (Source: BoM,2009) ..................................................................................................................................................... 52Figure 5.4: Wind Roses (3pm) for Sydney (Observatory Hill), Site Number 066062 (Source: BoM,2009) ..................................................................................................................................................... 53Figure 5.5: Indicative Top Sources of Air Pollution for the Manly LGA (Source: DEWHA, 2008) ........ 54Figure 5.6: Indicative Top Sources of Air Pollution for the Warringah LGA (Source: DEWHA, 2008) . 54Figure 5.7: Water Quality Sampling Sites for the Period 1994 to 2002 (After: PBP, 2003b) ................ 60Figure 5.8: Peak Flood Levels and Velocities for 1% AEP Flood in Manly Lagoon (After: PBP, 2003b).............................................................................................................................................................. 63Figure 5.9: Aerial Photograph Showing the Distribution of the Seagrass Zostera capricorni in ManlyLagoon, 17 July 2009. ........................................................................................................................... 71Figure 5.10: Locations of Endangered Ecological Communities at Manly Lagoon [Note: Map has notbeen updated to reflect extents of current field survey] (Source: Warringah Council, 2010) ............... 75Figure 5.11: Nesting Sites of Little Pied Cormorant Colonies at Manly Lagoon, 12 November 2009 .. 87Figure 5.12: Existing Road Network Surrounding the Proposed Works (Source: Google Maps) ...... 1052 July 2010 Cardno (NSW/ACT) Pty Ltd viiH:\Doc\2010\Reports.2010\Rep2580v4.doc