Environmental Assessment
Volume B-7
Mine
Environmental and Social
Management Plans
Ambatovy Project
408
January 2006
7.2.7
Emergency Contingency Plans
Mitigation for possible natural risks posed by both the collection and clarification
ponds and the waste dumps and excavated slopes include:
•
regular inspections and monitoring of hillslopes;
•
completion of maintenance measures;
•
embankment freeboard;
•
spillway;
•
geotechnical testing of tailings, fill, waste overburden and foundation
materials;
•
slope stability analyses;
•
international standards for acceptable Factors of Safety;
•
design earthquake ground motions and deformations;
•
installation and monitoring of instrumentation;
•
installation and monitoring of drainage structures;
•
conservative selection of design storm probable maximum precipitation
(PMP) and design wind (200 km/h);
•
inundation studies; and
•
storm routing design.
7.3
CLOSURE AND RECLAMATION ACTIVITIES
7.3.1
Water Management Plan
The mine will be reclaimed progressively throughout operations. Closure
topography at the mine will be configured to ensure that drainage areas of each
sub-watershed are close to pre-development conditions. Vegetation will be
re-established progressively on areas in which mining has been completed.
7.3.2
Flora and Fauna Management Plans
To initiate revegetation, organic matter will be incorporated into the surface layer
of the reclaimed soil profile to enhance fertility of tropical soils for reclamation.
Deficient nutrients will be replaced as necessary with fertilizer amendments to
allow for successful reclamation.
