Your Dam Your Responsibility (PDF~1.2MB)

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2 Risks Posed by Dams 2 Note: The risk in owning a dam can be shared by having suitable insurance cover. The premium however, may depend on the insurance company’s impression of how well you are able to manage the safety of the dam. This may take into account the engineering quality of the dam, your emergency action plans and the hazard. Dam owners should be aware that in situations where negligence of the owner is proved, insurance protection may be in doubt. 2.8 Buying a Property with a Dam If you are planning to buy a property that has a dam, it will be in your interest to check with the local Licensing Authority (refer Section 3.4 for a list of Licensing Authorities) to make certain that the necessary licences and requirements are in order. In particular, check that the dam is not subject to a Direction under the Water Act for carrying out works to make it safe, or that it does not carry a charge against the land in respect of works carried out by the Licensing Authority. 7
8 3 3 Licensing Requirements for Farm Dams 3.1 Take and Use Licences Where water in the dam is to be used for irrigation or commercial purposes, you will need a Licence to Take and Use water whether the dam is on a waterway or not. You will need to hold a ‘take and use’ licence for the period of time that you wish to take and use water out of the dam. You will need a licence to ‘take and use’ water before you can get a licence to construct a new dam. Dams used for domestic and stock purposes built on your property do not require a take and use licence. With the 2002 changes to the Water Act, those with existing irrigation and commercial dams were able to obtain a Registration Licence for the water used from the dam. 3.2 Construction Licences In all cases where you wish to build a dam on a waterway you will need a once-off Construction Licence. If you wish to build a dam off a waterway you will need a construction licence if the dam is: (a) 5 metres or higher and 50 megalitres capacity or larger; or (b) 10 metres or higher and 20 megalitres capacity or larger; or (c) 15 metres or higher, regardless of capacity. Note: The height of the dam or embankment is the difference in level between the natural surface level, bed of a gully, stream or waterway at the downstream toe of the dam and the crest. Typically, a condition of the Construction Licence will require the dam to be designed and the construction supervised by a suitably qualified engineer if your dam: • is located on a waterway with high ecological values; or • is on a watercourse; or • is of the dimensions given in (a), (b) or (c) above, whether or not the dam is on a waterway; or • is on a waterway and is considered to be potentially hazardous; or • is on a waterway and the dam has a wall that is 5 metres or more high and a capacity of 20 megalitres or more; or • has a catchment area above the site of the dam of more than 200 hectares. See your local Licensing Authority listed in Section 3.4 for more details and for conditions associated with Construction Licences. 3.3 Operating Licences If you have a take and use licence, in most cases, conditions will also be set concerning the operation of the dam. A common condition will be to operate the dam to allow flows to pass downstream of the dam during certain times of the year. Depending on the size of your dam and its potential hazard, whether or not you have a take and use licence, you may be required to have an operating licence that may include conditions relating to surveillance and management of the dam’s safety.
Page 1 and 2: Irrigation and Commercial Farm Dams
Page 3 and 4: ii Published by the Victorian Gover
Page 5 and 6: iv Contents 6 Safety Surveillance .
Page 8 and 9: 1 Introduction It makes good busine
Page 10 and 11: 2 Risks Posed by Dams 2.1 Owner’s
Page 12 and 13: 2 Risks Posed by Dams The most comm
Page 16 and 17: 3 Licensing Requirements for Farm D
Page 18 and 19: 3 Licensing Requirements for Farm D
Page 20 and 21: 4 Planning to Build a Dam It is imp
Page 22 and 23: 4 Planning to Build a Dam 4.3 Types
Page 24 and 25: 4 Planning to Build a Dam 4 2. Turk
Page 26 and 27: 4 Planning to Build a Dam becomes a
Page 28 and 29: 4 Planning to Build a Dam 4.6.2 Ext
Page 30 and 31: 5 Construction of a Dam Mixing tops
Page 32 and 33: 5 Construction of a Dam is inviting
Page 34 and 35: 6 Safety Surveillance 6.1 Purpose o
Page 36 and 37: 6 Safety Surveillance QUICK VISUAL
Page 38 and 39: 6 Safety Surveillance 6 Warning: If
Page 40 and 41: 7 Operation and Maintenance of Dams
Page 48 and 49: 8 Dam Failure Emergency Section 8 i
Page 50 and 51: 8 Dam Failure Emergency Action 4. I
Page 52 and 53: 9 Decommissioning of Dams 9 The sit
Page 54 and 55: 10 Glossary of Terms Cut-off An imp
Page 56 and 57: 10 Glossary of Terms Monitoring Rec
Page 58 and 59: Publications directly relevant to f
Page 60 and 61: Appendix A A • probe - a ten-mill
Page 62 and 63: Appendix A Inspection Procedures Ge
Page 64 and 65:
Appendix A A and the resistance to
Page 66 and 67:
Appendix B 1. Seepage Problem Possi
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Appendix B Problem Possible Causes
Page 70 and 71:
Page 72 and 73:
Appendix B 2. Cracking, Deformation
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Appendix B 3. Miscellaneous Problem
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Appendix B utlet Works and Concrete
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Appendix C The depth of the core tr
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Appendix C will be needed. In stabl
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Appendix C The width of the dischar
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Appendix C Other Pipe Details At th
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D Figure C-4: Design guide for a fa
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