| ISSUES |
REHABILITATION OBJECTIVES |
MEASURES |
| Physical Stability Issues: |
| Water Dams |
Ensure long-term stability with no overtopping |
- monitor/maintain embankment indefinitely or breach
|
| Prevent erosion |
- protect erodible slopes
- plug intake with concrete, plug decants and remove towers
- maintain operating spillway preferably in durable rock
|
| Ditches |
Adequate flood capacity, prevent blockage and overtopping |
- design for extreme events
- construct from materials suitable for long-term stability
|
| Prevent erosion |
- provide riprap protection
- define and provide for long-term maintenance
|
| Culverts |
Ensure maintenance free passage of water under design flood conditions |
- remove culvert and breach, otherwise upgrade for design flood
- provide for long-term maintenance
|
| Storage Tanks |
Remove |
- drain, remove, knockdown, fill and cover
|
| Pipelines |
Remove surface and large shallow pipes |
- remove surface and large shallow pipes, plug pipes at depth
|
| Chemical Stability Issues: |
| Contaminated Reservoirs |
Meet water quality objectives by: controlling reactions and/or controlling migration; collect and treat |
- drain, treat and discharge; or monitor and treat indefinitely
- strip and dispose of contaminated soil in tailings basin or approved location
- breach dam
- revegetate
|
| Land Use Issues: |
| Dams |
Restore drainage patterns |
- breach and restore to erosion resistant drainage patterns; or stabilize to maintain lake
|
| Determine if alternative use exists |
- define means for transfer of ownership
|
| Reservoirs |
Return to original or approved use |
- maintain lake and transfer ownership; or drain and revegetate
|
| Ditches |
Restore drainage patterns |
- grade and establish vegetation
|
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Environmental Technology for Mining
