Manly Lagoon Dredging Project - Manly Council - NSW Government

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Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah CouncilsLarge areas of New South Wales have not been the subject of systematic survey orrecording of Aboriginal history. These areas may contain Aboriginal objects and otherheritage values which are not recorded on AHIMS;Recordings are provided from a variety of sources and may be variable in theiraccuracy. When an AHIMS search identifies Aboriginal objects in or near the area itis recommended that the exact location of the Aboriginal object be determined by relocationon the ground; andThe criteria used to search AHIMS are derived from the information provided byCardno to DECCW and DECCW assumes that this information is accurate.No Aboriginal objects were observed or located during any of the site visits made associatedwith the proposed works.Impact AssessmentIt is considered that the proposed dredging works will have no impacts on Aboriginal LandClaim or Native Title Claim matters in the area.As there were no Aboriginal objects or places recorded within the proposed works area andgiven that the area has been relatively altered since European settlement, it is highly unlikelythat the works will have any impact upon items of Aboriginal significance.The removal of sediment from the designated areas within Manly Lagoon will have very lowpotential to disturb any objects or places of Aboriginal significance, as the sand andsediment being removed is known to have been deposited relatively recently (i.e. since thebathymetric survey was undertaken for the Flood Study by MHL (1992)). There is potentialfor lagoon sediments to contain unidentified Aboriginal artefacts that may have been movedinto the proposed dredging areas by currents and flows within the lagoon. However, this isconsidered unlikely due to the highly disturbed nature of the site and surrounding areas.Mitigation MeasuresSediment removal from the lagoon will be limited to the sediments known to have beendeposited since previous bathymetric survey undertaken for the Flood Study (MHL, 1992).Since sediment accumulation has been associated with catchment flows and tidalmovements, it is unlikely that sediments have been accumulated which contain any heritageitems.The contractors and staff undertaking the works would be informed and made aware of theirresponsibilities in the event of the identification of any Aboriginal objects.If any Aboriginal objects and/or places are located during the dredging or sedimentrelocation phases, all works should cease in the immediate area. Council’s Project Managerand DECCW are to be contacted. If skeletal material is identified then NSW Police also needto be contacted.If potential Aboriginal objects are uncovered during the works, a Section 87 PreliminaryResearch Permit would need to be obtained from DECCW to determine the presence or2 July 2010 Cardno (NSW/ACT) Pty Ltd 98H:\Doc\2010\Reports.2010\Rep2580v4.doc
Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah Councilsabsence of Aboriginal objects and subsequently a Section 90 Consent to Destroy wouldneed to be obtained from DECCW if objects were identified at the works site for which noalternative strategy could be found.Representatives from MLALC have expressed interest in visiting the site during dredgingoperations to observe the process and to examine samples of material dredged from thelagoon for Aboriginal artefacts. Consequently, their representative (Allen Madden) should bekept informed of the dates on which dredging operations will occur to provide MLALC withthe opportunity to attend.5.5.2 Non-Aboriginal HeritageExisting EnvironmentA desktop review of non-Aboriginal heritage was undertaken on 9 July 2009 to locate itemsof heritage that are located near the proposed works, and may be sensitive or adverselyaffected by such works. Two databases were searched, including the State HeritageRegister, which contains items listed by the Heritage Council, and State and LocalGovernment agencies, and the Australian Heritage Database, which contains the WorldHeritage List, National Heritage List, Commonwealth Heritage List and Register of theNational Estate (RNE).The Australian Heritage Database search identified 59 heritage items within Manly andWarringah LGAs. However, only two of these items, as listed in Table 5.12, were located inproximity to the proposed works site. The State Heritage Register search identified 21heritage items within the suburbs of Manly Vale, North Manly, North Steyne and Queenscliff.However, only one item, as listed in Table 5.12, was proximal to the proposed works.Table 5.12: Items of Heritage Proximal to the Proposed Works (Sources: DECC, 2009b; DoP, 2009c)Item Name Location LGARegister of the National Estate – Registered (Australian Heritage Database)Manly Beach and Surrounds North Steyne ManlyQueenscliff Rock Pool North Steyne WarringahLocal Government Listings (State Heritage Register)Street Trees Riverview Parade, North Manly WarringahQueenscliff Rock Pool is located at the northern end of Queenscliff Beach, adjacent to therock face forming the headland. The ocean entrance of Manly Lagoon is situated at thenorthern end of Queenscliff Beach, with the low flow pipes from the lagoon terminating justbeyond the seaward end of the Pool.Impact AssessmentThe proposed works in general are considered not to affect the heritage significance of anyheritage items in the area. The only item of significance to the proposed works is the StreetTrees on Riverview Parade. The listed Street Trees include 15 Canary Island Palms2 July 2010 Cardno (NSW/ACT) Pty Ltd 99H:\Doc\2010\Reports.2010\Rep2580v4.doc
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Manly Lagoon Dredging Project - Manly Council - NSW Government

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