Manly Lagoon Dredging Project - Manly Council - NSW Government

Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah Councils1 IntroductionManly and Warringah Councils propose to dredge a portion of Manly Lagoon by removingaccumulated sediment within the lagoon between the footbridge at Nolan Reserve and theend of Riverview Parade. The area to be dredged comprises part of Crown reserve R56146under the Crown Lands Act, 1995 and the supporting land-based operations will beundertaken on Lot 1 DP60640 (a portion of Nolan Reserve) and Lot 2762 DP952038 (also aportion of Nolan Reserve). The removed sediment will be dosed (to aid clarification) anddewatered in geotextile bags. The dewatered sediment, referred to as dredge spoil, will beanalysed and, providing its chemical and physical composition is suitable, will be beneficiallyreused. If the material is not suitable for reuse, it will be sent to an appropriate landfill. Theproposed dredging works are described in detail in Section 2.1.1 Purpose of the ReportCardno has been engaged by Manly Council to prepare this Review of EnvironmentalFactors (REF). The purpose of this REF is to describe the dredging process, to assess anddocument the likely impacts of the dredging process on the environment, and to detailprotective measures to minimise any impacts on the environment.This REF considers the potential environmental impacts of the proposed dredging anddewatering activities. Consideration of land application or disposal of the treated dredgespoil is outside the scope of this REF.For the purpose of the proposed works, Manly Council is the proponent and also thedetermining authority, in conjunction with the Land and Property Management Authority(LPMA; formerly the Department of Lands (DoL)) and Warringah Council, under Part 5 of theEnvironmental Planning and Assessment Act 1979 (EP&A Act).Under Part 5 of the EP&A Act there is a duty for determining authorities to consider theenvironmental impacts of proposed activities. The proposal and its associated environmentalimpacts have been assessed in the context of: Clause 228 of the Environmental Planning and Assessment Regulation 2000 (EP&ARegulation); The Threatened Species Conservation Act 1995 (TSC Act); The Fisheries Management Act 1994; The National Parks and Wildlife Act 1974 (NPW Act); The Heritage Act 1977; The Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act); and The State Environmental Planning Policy (Infrastructure) 2007.In doing so, this REF aids in fulfilling the requirements of Section 111 of the EP&A Act; thatthe determining authorities, in this case LPMA and Manly and Warringah Councils, take intoaccount to the fullest extent possible, all matters that may potentially affect the environmentby reason of the proposed activity.2 July 2010 Cardno (NSW/ACT) Pty Ltd 1H:\Doc\2010\Reports.2010\Rep2580v4.doc