North Pine Dam Manual of Operational Procedures for Flood Mitigation Revision 10 | November 2019 Revision No. Date Amendment Details 0 10 December 1986 Original Issue 1 6 October 1992 Complete revision and re-issue 2 13 November 1997 Complete revision and re-issue 3 26 July 2002 Complete revision and re-issue 4 5 September 2007 Complete revision and re-issue 5 August 2010 (approved by gazette Complete revision and re-issue notice dated 17 December 2010) 6 October 2011 Revision 7 October 2012 Minor revision only 8 November 2013 Revision 9 November 2014 Revision based on outcomes of the North Pine Dam Optimisation Study and Government policy decision 10 November 2019 Revision Revision No: 10 – November 2019 Doc No: MAN-00160 Manual of Operational Procedures for Flood Mitigation at North Pine Dam 1 TABLE OF CONTENTS Table of Contents Table of Contents .............................................................................................................................................................. 2 Glossary ............................................................................................................................................................................. 4 Preface ............................................................................................................................................................................... 8 1. Introduction .................................................................................................................................................................. 9 1.1 Purpose ............................................................................................................................................................. 9 1.2 Application Exclusions ........................................................................................................................................ 9 1.3 Agency Responsibilities ..................................................................................................................................... 9 1.4 Legal Authority ................................................................................................................................................. 10 1.5 Document Control ............................................................................................................................................ 10 1.6 Significant Changes in this Revision ................................................................................................................ 10 2. Procedural Matters .................................................................................................................................................... 11 2.1 Operational Arrangements ............................................................................................................................... 11 2.2 Responsibilities of the DSFOE ......................................................................................................................... 11 2.3 Responsibilities of a Duty Flood Operations Engineer ..................................................................................... 12 2.4 Responsibilities of Flood Officers ..................................................................................................................... 12 2.5 Responsibilities of Dam Supervisors ................................................................................................................ 12 2.6 Responsibilities of Dam Operators ................................................................................................................... 13 2.7 Qualifications, Experience and Training of Flood Operations Staff ................................................................. 13 2.8 Maintaining and Improving the FFS.................................................................................................................. 15 2.9 Maintenance of Communications Equipment ................................................................................................... 15 3. Flood Mitigation Objectives ...................................................................................................................................... 16 3.1 Introduction ...................................................................................................................................................... 16 3.2 Flood Mitigation Objectives .............................................................................................................................. 16 3.3 Prevent structural failure of the Dam ................................................................................................................ 16 3.4 Ensure the Dam’s Water Supply Compartment is full at the completion of the Flood Event ............................ 18 3.5 Mitigate Downstream Flooding ......................................................................................................................... 19 3.6 Protect the Environment ................................................................................................................................... 19 4. Flood Operations Overview ...................................................................................................................................... 21 4.1 Introduction ...................................................................................................................................................... 21 4.2 Flood Operations Centre Mobilisation and Demobilisation ............................................................................... 21 4.3 Flood Event Commencement and Ending ........................................................................................................ 21 4.4 Operational Strategy Selection and Release Plan Development ..................................................................... 22 4.5 Use of Rainfall Forecasts ................................................................................................................................. 22 4.6 Consideration of Forecast Rainfall in Flood Operations Centre Mobilisation .................................................... 23 4.7 Consideration of Forecast Rainfall in judging whether Rainfall is Complete or Nearly Complete ..................... 24 4.8 Consideration of Forecast Rainfall in developing a Release Plan .................................................................... 24 4.9 Consideration of Forecast Rainfall in Emergency Response ........................................................................... 25 Revision No: 10 – November 2019 Doc No: MAN-00160 Manual of Operational Procedures for Flood Mitigation at North Pine Dam 2 TABLE OF CONTENTS 4.10 Alternative Procedures ..................................................................................................................................... 25 4.11 Implementing the Release Plan ....................................................................................................................... 27 4.12 Bridge Closure Advice ...................................................................................................................................... 27 5. North Pine Dam Flood Operations ........................................................................................................................... 28 5.1 Flood Release Infrastructure ............................................................................................................................ 28 5.2 Flood Operations Procedures .......................................................................................................................... 29 5.3 Radial Gate Operation ...................................................................................................................................... 32 6. Emergency Flood Operations ................................................................................................................................... 33 6.1 Introduction ...................................................................................................................................................... 33 6.2 Dam Failure Considerations ............................................................................................................................. 33 6.3 Dam Operator Actions in the Event of Communications Failure ...................................................................... 33 6.4 Equipment Failure ............................................................................................................................................ 35 6.5 Failure of the FFS ............................................................................................................................................. 35 7. Declarations of Temporary Full Supply Levels for Flood Mitigation or the application of a Reduced Full Supply Level .................................................................................................................................................................... 36 7.1 Glossary ........................................................................................................................................................... 36 7.2 Purpose ............................................................................................................................................................ 36 7.3 Application .......................................................................................................................................................