Manly Lagoon Dredging Project - Manly Council - NSW Government

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Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah Councils5.8 Utilities and ServicesExisting EnvironmentA utility services search was undertaken through the ‘Dial Before You Dig’ service by Cardnoon 8 July 2009. Plans were provided to indicate the locations of the following servicesproximal to the works site:Sydney Water pipes;Energy Australia cables;Jemena Gas pipes; andTelstra cables.The ‘Dial Before You Dig’ plans will be provided to the contractor. The contractor will berequired to consider and accurately locate the utilities present when finalising dredgingplans.Correspondence with MHL also indicated the presence of a water level gauge, in the form ofa pressure transducer owned and operated by MHL within the lagoon (shown on the LayoutPlan in Appendix J).Impact AssessmentCare should be taken during dredging operations to avoid identified utilities, such as highpressure gas mains and the MHL pressure transducer, which are known to occur in theworks area (see photos in Appendix A). Appendix J shows the location of the pressuretransducer, and ‘Dial Before you Dig Plans’ are available to show the location of otherutilities.If the dredging profile avoids these utilities, then it is not anticipated that activities will affectany utilities or utility supply during or after completion of the works.Mitigation MeasuresA Utilities Management Plan which includes the accurate location of all utilities presentshould be prepared by the contractor for incorporation into the CEMP. All contractors andcontracted staff should observe this Management Plan to avoid damage or disruption to anyutilities during works.Prior to the commencement of any works, the contractor must investigate the nature andlocation of all services that might be encountered during the construction of the work andconsult with the relevant authorities with respect to these matters.2 July 2010 Cardno (NSW/ACT) Pty Ltd 108H:\Doc\2010\Reports.2010\Rep2580v4.doc
Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah Councils5.9 Visual Amenity and AestheticsExisting EnvironmentThe area surrounding the proposed works site can be classified as highly modified andhence not in its natural state. However, the lagoon banks in the area of the proposed worksdo consist of several parks and reserves, as outlined in Section 2.4 and indicated on Figure1.2, therefore the visual amenity of the lagoon for recreational users (i.e. of Manly andWarringah Golf Courses) and residences needs to be taken into account.Impact AssessmentAccording to the Manly Council LEP 1988 Zoning Map, the lagoon banks adjacent to theproposed works are not classified as Foreshore Scenic Protection areas. However theproposed works should still aim to minimise any detrimental impacts on the amenity of theforeshore in this location regardless, as the proposed dredging areas are highly visible toManly Golf Course patrons, and residents of Riverview Parade and Addiscombe Road.The Warringah LEP 2000 Zoning Map 8 identifies that the area of Nolan and PassmoreReserves is zoned as Public Open Space, and also indicates the location of the heritageitem (street tress) on Riverview Parade. The Manly Lagoon Catchment Locality Statement,which is Appendix G of the Warringah LEP 2000, contains two locality statements relating tothe proposed works: Locality G2 – Riverview Parade and Locality G3 – Manly LagoonSuburbs. These locality statements generally deal with the type of dwellings and facilities(i.e. shops and offices permitted in the area), however it should be noted that the works docomply with these statements as the proposed works will provide further flood storage areavia deepening of the waterway.It is expected that the proposed works will improve the visual amenity of the site andsurrounding landscape in the long term. However, in the short term the dredging andsediment dewatering operations would alter the visual amenity of the immediate locality. Thisimpact is short term and temporary and hence not considered to be significant. Adversevisual impacts will result from the presence of plant, heavy vehicles, dredgers, geobags andsite fencing required for the project. The geobag storage area in Nolan Reserve will beapproximately 4,500m 2 and must be fenced (in accordance with the Technical Specificationin Appendix K).The site compound will occupy a total maximum area of approximately 200m 2 and will belocated on the bank of the lagoon within Nolan Reserve. The location of the site compoundand dewatering zone on Nolan Reserve is shown in Appendix M.Mitigation MeasuresCare is to be exercised to minimise the visual impact of the proposed works whereverpossible. Any construction waste or rubbish resulting from the works should be removed offsiteon a regular basis. Following the completion of works, all machinery and unnecessarysignage and fencing should be removed from the site as soon as practicable.2 July 2010 Cardno (NSW/ACT) Pty Ltd 109H:\Doc\2010\Reports.2010\Rep2580v4.doc
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Manly Lagoon Dredging Project - Manly Council - NSW Government

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