Your Dam Your Responsibility (PDF~1.2MB)
Your Dam Your Responsibility (PDF~1.2MB) Your Dam Your Responsibility (PDF~1.2MB)
Appendix A A • probe – a ten-millimetre diameter by one metre long blunt end metal rod with right angle ‘T’ handle at one end. The probe can provide information on conditions below the surface such as depth and softness of a saturated area. Soft areas indicate poor compaction or saturated material; and • hammer – to test soundness of concrete structures. (c) Observations to be Recorded All measurements and descriptive details that are required to portray an accurate picture of the dam’s current condition must be recorded. This information falls into three categories: • location – the location of any questionable area or condition must be accurately described to allow it to be properly evaluated. The location along the length of the dam should be noted, as well as the height above the toe or distance down from the dam’s crest should also be measured and recorded. The same applies to conditions associated with the outlet or spillway; • extent of area – record the length, width and depth or height of any area where a suspected problem is found. • descriptive detail – a description of a condition or observation must be given which is brief but yet containing all relevant details. Some factors to include are: – quantity of seepage from point and area sources; – colour or quantity of sediment in water; – location, length, displacement, and depth of cracks; – is area moist, wet or saturated? – is protective cover adequate (topsoil/grass)? – is surface drainage satisfactory? – do batter slopes look too steep? – are there bulges or depressions on the slopes? – does deterioration appear to be rapid or slow? and – have conditions changed? (note in what way etc). Note: A sketch plan of the dam is a helpful aid to recording observations(see Preliminaries). It should preferably be approximately to scale and the locations of all observations should be indicated on it. This is not a complete list but serves as an initial guide. If a condition has changed since the last inspection, it must be noted; a photograph should also be taken and put in the diary, noting the date and a description of the scene shown in the photograph. Remember, a primary purpose of the inspection is to pick up changes which have occurred since the previous inspection, and that if a situation looks as if it is worsening or otherwise causes concern the owner should not hesitate to get professional help. Table A1 is a typical form of checklist for noting defects and keeping long term records of behaviour. 53
54 A Appendix A Table A1 Dam Inspections Checklist Owner: Property: Date: Areas of Dam Items to Address Upstream Slope • Protection • Uniformity • Displacements, bulges, depressions • Vegetation Crest • Cracking • Low spots • Sinkholes • Vegetation Downstream Slope • Signs of instability and non-uniformity • Erosion • Rabbit, wombat or yabby activity • Obscuring growth (trees) • Wetness • Changes in condition • Stock damage Seepage • Location • Extent of area • Characteristics of area (ie. soft, boggy, firm) • Quantity and colour • Transported or deposited material • Spring activity or Boils • Piping and tunnel erosion Outlet • Changes in vegetation • Outlet pipe and valve condition • Operation • Leakage • Downstream erosion • Gatevalve operation, condition and leakage Spillway • Condition of crest, chute and floor protection • Spillway obstructions • Erosion or back cutting in spillway Observations/ Change from Last Inspection
- 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 14 and 15: 2 Risks Posed by Dams 2 Note: The r
- 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 42 and 43: 7 Operation and Maintenance of Dams
- Page 44 and 45: 7 Operation and Maintenance of Dams
- Page 46 and 47: 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 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
- Page 68 and 69: Appendix B Problem Possible Causes
- Page 70 and 71: Appendix B Problem Possible Causes
- Page 72 and 73: Appendix B 2. Cracking, Deformation
- Page 74 and 75: Appendix B Problem Possible Causes
- Page 76 and 77: Appendix B 3. Miscellaneous Problem
- Page 78 and 79: Appendix B utlet Works and Concrete
- Page 80 and 81: Appendix C The depth of the core tr
- Page 82 and 83: Appendix C will be needed. In stabl
- Page 84 and 85: Appendix C The width of the dischar
- Page 86 and 87: Appendix C Other Pipe Details At th
- Page 88 and 89: D Figure C-4: Design guide for a fa
- Page 90: www.dsevic.gov.au
54<br />
A<br />
Appendix A<br />
Table A1 <strong>Dam</strong> Inspections Checklist<br />
Owner: Property: Date:<br />
Areas of <strong>Dam</strong> Items to Address<br />
Upstream<br />
Slope<br />
• Protection<br />
• Uniformity<br />
• Displacements, bulges,<br />
depressions<br />
• Vegetation<br />
Crest • Cracking<br />
• Low spots<br />
• Sinkholes<br />
• Vegetation<br />
Downstream<br />
Slope<br />
• Signs of instability and<br />
non-uniformity<br />
• Erosion<br />
• Rabbit, wombat or yabby<br />
activity<br />
• Obscuring growth (trees)<br />
• Wetness<br />
• Changes in condition<br />
• Stock damage<br />
Seepage • Location<br />
• Extent of area<br />
• Characteristics of area (ie.<br />
soft, boggy, firm)<br />
• Quantity and colour<br />
• Transported or deposited<br />
material<br />
• Spring activity or Boils<br />
• Piping and tunnel erosion<br />
Outlet • Changes in vegetation<br />
• Outlet pipe and valve<br />
condition<br />
• Operation<br />
• Leakage<br />
• Downstream erosion<br />
• Gatevalve operation,<br />
condition and leakage<br />
Spillway • Condition of crest, chute<br />
and floor protection<br />
• Spillway obstructions<br />
• Erosion or back cutting in<br />
spillway<br />
Observations/<br />
Change from Last Inspection
Change language