ISO 21795-2:2021

INTERNATIONAL ISO
STANDARD 21795-2
First edition
2021-10
Mine closure and reclamation
planning —
Part 2:
Guidance
Planification de la fermeture et de la restauration des mines —
Partie 2: Recommandations
Reference number
© ISO 2021
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Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Closure and reclamation of a mine site . 2
4.1 General . 2
4.2 Tailings storage facilities. 2
4.2.1 General . 2
4.2.2 Objectives . 2
4.2.3 Approach . 3
4.2.4 Status and condition assessment . 3
4.2.5 Risk assessment . 4
4.2.6 Closure and reclamation alternatives analyses . 4
4.2.7 Closure and reclamation plan . 5
4.3 Water storage facilities . 6
4.3.1 General . 6
4.3.2 Objectives . 6
4.3.3 Approach . 7
4.3.4 Status and condition assessment . 7
4.3.5 Risk assessment . 7
4.3.6 Closure and reclamation alternatives analyses . 8
4.3.7 Closure and reclamation plan . 8
4.4 Waste rock dumps . 9
4.4.1 General . 9
4.4.2 Objectives . 9
4.4.3 Approach . 9
4.4.4 Status and condition assessment . 10
4.4.5 Risk assessment . 11
4.4.6 Closure and reclamation alternatives analyses . 11
4.4.7 Closure and reclamation plan .12
4.5 Heap leach facilities. 12
4.5.1 General .12
4.5.2 Objectives .13
4.5.3 Approach . 13
4.5.4 Status and condition assessment . 13
4.5.5 Risk assessment . 14
4.5.6 Closure and reclamation alternatives analyses . 14
4.5.7 Closure and reclamation plan . 15
4.6 Open pits . 16
4.6.1 General . 16
4.6.2 Objectives . 16
4.6.3 Approach . 16
4.6.4 Status and condition assessment . 16
4.6.5 Risk assessment . 17
4.6.6 Closure and reclamation alternatives analyses . 17
4.6.7 Closure and reclamation plan . 18
4.7 Underground workings . 20
4.7.1 General .20
4.7.2 Objectives .20
4.7.3 Approach . 20
4.7.4 Status and condition assessment . 20
4.7.5 Risk assessment . 21
iii
4.7.6 Closure and reclamation alternatives analyses . 21
4.7.7 Closure and reclamation plan . 21
4.8 Mine infrastructure . 24
4.8.1 General . 24
4.8.2 Objectives . 24
4.8.3 Approach . 24
4.8.4 Status and condition assessment . 24
4.8.5 Risk and opportunity assessment . 25
4.8.6 Closure and reclamation alternatives analyses . 25
4.8.7 Closure and reclamation plan . 26
4.9 Temporary closure . 27
4.9.1 General . 27
4.9.2 Objectives . 27
4.9.3 Status and condition assessment .28
4.9.4 Risk and opportunity assessment .28
4.9.5 Closure and reclamation alternatives analyses .28
4.9.6 Closure and reclamation plan .28
5 Land reclamation and water management .29
5.1 Landforms .29
5.1.1 General .29
5.1.2 Objectives .29
5.1.3 Approach .29
5.1.4 Plan .
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