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NOTICE of INTENT Clarence Strait Tidal Energy Project, Northern Territory

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NOTICE of INTENT Clarence Strait Tidal Energy Project, Northern Territory J:\J obs \42213817\ 6 D eli v\Clar ence Str ait N OI FINA L\Cl arenc e Strai t Tidal Energ y N otic e of I nt ent amendment .doc Clarence Strait Tidal Energy Project, Northern Territory NOTICE OF INTENT Clarence Strait Tidal Energy Project, Northern Territory Prepared for Tenax Energy GPO Box 2848 Darwin NT 0801 17 December 2008 42213817 CLARENCE STRAIT TIDAL ENERGY PROJECT, NORTHERN TERRITORY Project Manager: URS Australia Pty Ltd Shelley Franklyn Level 3, 93 Mitchell Street Environmental Scientist Darwin, NT 0801 URS GPO Box 2005, Darwin NT 0801 Australia Tel: 61 8 8980 2900 Project Director: Fax: 61 8 8941 3920 Ian Hollingsworth Principal Environmental Scientist URS Author: Date: 17 December 2008 Reference: Notice of Intent, Tidal Power Generator, Clarence Strait, Northern Territory Shelley Franklyn Status: FINAL Environmental Scientist URS Proponent: Alan Major Managing Director Tenax Energy Prepared for Tenax Energy, 17 December 2008 J:\Jobs\42213817\6 Deliv\Clarence Strait NOI FINAL\Clarence Strait Tidal Energy Notice of Intent amendment.doc CLARENCE STRAIT TIDAL ENERGY PROJECT, NORTHERN TERRITORY Table of Contents Tabl e of C ont ents 1 Introduction ...................................................................................................... 1 2 Project Background ......................................................................................... 2 2.1 Name and Contact Details of Person Lodging the Application ................................. 2 2.2 Proponent ........................................................................................................................ 2 2.3 Project Name and Location............................................................................................ 2 2.3.1 Project Name .................................................................................................... 2 2.3.2 Project Location ................................................................................................ 2 2.4 Policy Support................................................................................................................. 4 2.4.1 Power generation and consumption in the NT ................................................. 4 3 Site Selection.................................................................................................... 5 3.1 Requirements .................................................................................................................. 5 3.1.1 Clarence Strait site ........................................................................................... 5 3.2 Description of Preferred Area........................................................................................ 5 3.2.1 Turbine Area ..................................................................................................... 5 3.2.2 Submarine Cable Area ..................................................................................... 7 3.2.3 Shore Crossing ................................................................................................. 7 3.3 Jurisdiction...................................................................................................................... 8 4 Project Description .......................................................................................... 9 4.1 Background to Tidal Energy Generation...................................................................... 9 4.1.1 Tidal energy applications worldwide................................................................. 9 4.2 Tidal Stream Systems................................................................................................... 10 4.3 Science of Tidal Energy Generation ........................................................................... 10 4.4 Clarence Strait Energy Potential ................................................................................. 11 4.4.1 Site Selection.................................................................................................. 12 4.5 Turbine density ............................................................................................................. 12 4.6 Turbine design .............................................................................................................. 12 4.6.1 Tidal electricity generators.............................................................................. 12 4.7 Turbine Components.................................................................................................... 13 4.7.1 Rotor ............................................................................................................... 14 4.7.2 Open centre turbine ........................................................................................ 14 4.7.3 Duct................................................................................................................. 14 4.7.4 Stator .............................................................................................................. 14 Prepared for Tenax Energy, 17 December 2008 J:\Jobs\42213817\6 Deliv\Clarence Strait NOI FINAL\Clarence Strait Tidal Energy Notice of Intent amendment.doc i CLARENCE STRAIT TIDAL ENERGY PROJECT, NORTHERN TERRITORY Table of Contents 4.7.5 Generator........................................................................................................ 14 4.7.6 Gravity Base ................................................................................................... 15 4.8 Construction, Operation and Maintenance ................................................................ 16 4.8.1 Installation....................................................................................................... 16 4.8.2 Operation ........................................................................................................ 17 4.8.3 Maintenance ................................................................................................... 17 4.8.4 Decommissioning ........................................................................................... 18 4.8.5 Waste and Hazardous Substances ................................................................ 18 4.9 Electricity Connection .................................................................................................. 18 4.9.1 Cable Route .................................................................................................... 18 4.9.2 Electricity Flow................................................................................................ 19 4.9.3 Installation....................................................................................................... 19 5 Description of the Environment .................................................................... 20 5.1 Previous Environmental Assessments....................................................................... 20 5.2 Direct Impacts on Physical Environment ................................................................... 20 5.2.1 Bathymetry and Topography .......................................................................... 20 5.2.2 Geology and Geomorphology......................................................................... 20 5.3 Marine and terrestrial species ..................................................................................... 20 5.4 Description of the Human Environment ..................................................................... 24 5.4.1 Social .............................................................................................................. 24 5.4.2 Economic ........................................................................................................ 24 5.4.3 Recreation and Tourism ................................................................................. 24 5.4.4 Transport......................................................................................................... 24 5.4.5 Cultural Heritage............................................................................................. 24 6 Issues Identification ....................................................................................... 25 6.1 Potential Direct Physical Environmental Impacts ..................................................... 25 6.1.1 Bathymetry and Topography .......................................................................... 25 6.1.2 Geology and Geomorphology......................................................................... 25 6.1.3 Marine Species ............................................................................................... 26 6.2 Indirect Impacts on the Physical Environment .......................................................... 27 6.2.1 Environment benefits ...................................................................................... 27 6.3 Health ............................................................................................................................. 27 6.4 Economic ....................................................................................................................... 27 Prepared for Tenax Energy, 17 December 2008 J:\Jobs\42213817\6 Deliv\Clarence Strait NOI FINAL\Clarence Strait Tidal Energy Notice of Intent amendment.doc ii CLARENCE STRAIT TIDAL ENERGY PROJECT, NORTHERN TERRITORY Table of Contents 6.4.1 Direct Economic Impacts................................................................................ 27 6.4.2 Indirect Economic Impacts.............................................................................
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