Prince of Wales/Omāroro Reservoir
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Prince of Wales/Omāroro Reservoir Notice of Requirement: Assessment of Environmental Effects Notice of Requirement for the Prince of Wales / Omāroro Reservoir: Assessment of Environmental Effects i Notice of Requirement for the Prince of Wales / Omāroro Reservoir: Assessment of Environmental Effects Contents 1 Introduction ................................................................................................................................. 1 1.1 The requiring authority/applicant ................................................................................................. 1 1.1.1 Wellington City Council .................................................................................................. 1 1.1.2 Wellington Water Limited .............................................................................................. 1 1.2 Purpose and scope of this report ................................................................................................... 2 2 Background to the Project ............................................................................................................ 3 2.1 Introduction ................................................................................................................................... 3 2.2 Context of the Project .................................................................................................................... 4 2.2.1 Wellington City water supply network ........................................................................... 4 2.2.2 Wellington Low Level Water Supply Zone ...................................................................... 5 2.3 Need for the Project ...................................................................................................................... 6 2.3.1 Network management and maintenance ...................................................................... 7 2.3.2 Operational resilience .................................................................................................... 8 2.3.3 Hazard resilience ............................................................................................................ 8 2.3.4 Growth and well-being ................................................................................................. 10 2.4 Project Objectives ........................................................................................................................ 11 2.5 Reservoir requirements ............................................................................................................... 12 2.6 History of the Project ................................................................................................................... 12 2.6.1 Reservoir investigations ............................................................................................... 12 2.6.2 Omāroro ....................................................................................................................... 13 3 Site description .......................................................................................................................... 14 3.1 Site location ................................................................................................................................. 14 3.2 Property details ............................................................................................................................ 15 3.3 Existing environment ................................................................................................................... 16 3.3.1 Wellington Town Belt ................................................................................................... 16 3.3.2 Landscape and visual .................................................................................................... 16 3.3.3 Ecology .......................................................................................................................... 18 3.3.4 Playing fields and tracks ............................................................................................... 19 4 Description of the Project ........................................................................................................... 22 4.1 Prince of Wales/Omāroro Reservoir design ................................................................................ 22 4.1.1 Seismic design criteria .................................................................................................. 23 4.1.2 Pipe tunnel.................................................................................................................... 23 4.1.3 Connection to existing network ................................................................................... 23 i Notice of Requirement for the Prince of Wales / Omāroro Reservoir: Assessment of Environmental Effects 4.1.4 Service relocations........................................................................................................ 24 4.1.5 Reservoir site landscaping ............................................................................................ 24 4.2 Use and raising of the upper and lower fields ............................................................................. 24 4.3 Indicative construction methodology .......................................................................................... 26 4.3.1 Temporary material storage ......................................................................................... 27 4.3.2 Erosion and sediment control ...................................................................................... 27 4.3.3 Dewatering ................................................................................................................... 28 4.3.4 Vehicle access ............................................................................................................... 28 4.4 Earthworks volumes..................................................................................................................... 28 5 Approvals sought under the Resource Management Act 1991 ...................................................... 30 5.1 Notice of Requirement for Designation ....................................................................................... 30 5.1.1 Outline plans ................................................................................................................. 31 5.2 Resource consents ....................................................................................................................... 32 6 Consideration of alternatives ...................................................................................................... 34 6.1 Statutory requirement to consider alternatives .......................................................................... 34 6.2 Alternative methods .................................................................................................................... 35 6.2.1 Micro-storage ............................................................................................................... 35 6.2.2 New water supply sources ........................................................................................... 36 6.2.3 New and upgraded pipes, pumps, and treatment ....................................................... 36 6.2.4 Upgrades to existing reservoirs .................................................................................... 36 6.2.5 New reservoirs .............................................................................................................. 36 6.3 Gravity vs pumped system ........................................................................................................... 37 6.3.1 Gravity-based reservoir ................................................................................................ 37 6.3.2 Pump based reservoir ................................................................................................... 38 6.4 Alternative sites ........................................................................................................................... 39 6.4.1 Early Reservoir Investigations ...................................................................................... 39 6.4.2 Preliminary CBD Reservoir Investigations, 2004 .......................................................... 39 6.4.3 Proposed CBD Reservoir Options Assessment, 2011 ................................................... 40 6.5 Site selection ................................................................................................................................ 43 6.6 Reservoir form ............................................................................................................................. 44 6.7 Construction access ..................................................................................................................... 44 7 Consultation and engagement .................................................................................................... 46 7.1 Iwi ................................................................................................................................................. 46 7.2 Wellington City Council - Operations ........................................................................................... 46 7.3 Greater Wellington Regional Council ........................................................................................... 46 7.4 Local community