Company Profile Corporate Structure Company History Our People Our Cotton Tree Company Details

Koidu Kimberlite Project Location Profit Sharing Geological Setting Project History No. 1 Pipe Background Vertical Pit Development Production Exploration Geological Model No. 2 Pipe Dyke Zone A and B Blows From Pit to Polish

Tongo Diamond Field Overview Bulk Sampling Exploration Road Refurbishment Programme

Safety, Health and Environment Environmental Rehabilitation Education and Training Infrastructural Development Social Upliftment Economic Development

News & Events In the Press

Environmental Rehabilitation

Environmental management and protection of natural resources is an ongoing process, with reclamation of water, soil and land being continuously carried out according to World Bank guidelines and Koidu Holdings' approved Environmental Management Programme for the Koidu Kimberlite Project.

Since the discovery of alluvial diamonds in 1934, mining of the gravels in the river systems in and around Koidu by Sierra Leone Selection Trust and the National Diamond Mining Company, as well as by the artisanal miners has caused extensive damage to the environment.

Koidu Holdings works to restore drainage patterns disturbed by the historical mining activities, converting previously swampy and waterlogged workings into land suitable for agriculture. Re-establishing proper drainage and water storage areas also benefits the local community who struggle to find clean water, particularly during the dry season.

Discharging borehole water into new drainage systems for use by local community	Reclamation of swampland created by historical mining activities and ongoing artisanal mining	Re-profiling of landscape damaged by historical mining and dumping

In areas where rock dumps have reached their final shape and size, stockpiled topsoil is applied allowing seeds of the natural plant species to germinate and revegetate the dumps.

Slimes dams that have reached the end of their life are reclaimed by excavating the grit and fines and using them to level working areas. The emptied slimes dams are then re-equipped and reused for slimes disposal, thereby limiting the size of the slimes dam footprint and minimising the environmental impact.

Since the processing method does not cause contamination of water resources, the process water is reused over and over, being collected from slimes and pumped back into the plant water dam. The process water dam, due to the limited access by the local community, is favoured by the wildlife in the area.

Topsoil stockpiles used for waste dump rehabilitation	Revegetation of waste dumps	Reclamation and recycling of process water