Environmental Engineering Reference
In-Depth Information
TABLE 21.3
(Continued)
Issues
Objectives
Control
Chemical Stability
●
Metal leaching
●
Acid drainage
●
Mill reagents
●
Contaminants
●
Clean water
●
Dump design
●
Isolate of reaction material
●
Cap and revegetate
●
Control drainage
●
Collect and treat effl uent
●
Monitor
Land Use
●
Productivity
●
Aesthetics
●
Drainage
●
Restore to original or
accepted alternative use
●
Establish drainage patterns
●
Re-contour slopes
●
Establish vegetation
Tailings impoundments
Physical Stability
●
Dust
●
Erosion
●
Dam wall
●
Drainage
●
Stable surfaces
●
Avoid failure and slumps
●
Control sediment
●
Site selection
●
Dam design
●
Tailings disposal method
●
Cap and revegetate
●
Control drainage
Chemical Stability
●
Metal leaching
●
Acid drainage
●
Mill reagents
●
Dam structure
●
Clean water by:
●
Control reactions
●
Control migration
●
Collect and treat
●
Use chemically stable material in dam
wall construction
●
Pre-treatment of tailings
●
Cover to control reactions
●
Form wetland
●
Divert runoff
●
Collect and treat effl uent
●
Monitor
Land Use
●
Productivity
●
Visual impacts
●
Restore to appropriate land use
●
Re-contour
●
Cap and establish vegetation
●
Flood and form wetland
Water Management
Physical Stability
●
Dam walls
●
Structure
●
Pipelines
●
Ditches
●
Settling ponds
●
Culverts
●
Erosion
●
Long-term
●
Safety of
●
Flood capacity
●
Prevent blockage
●
Prevent erosion
●
stability
●
structures
●
Free passage of water
●
Breach dam
●
Remove structure
●
Plug intakes and decants
●
Upgrade fl ood design
●
Remove pipes
●
Fill in ditches
●
Provide for long-term maintenance
●
Monitor
Chemical Stability
●
Contaminant of surface
and/or groundwater
●
Clean water
●
Remove or prevent contamination
●
Drain, treat and discharge
●
Install barriers
●
Establish vegetation
●
Monitor
(Continued)
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