Exploration > Tongo Field > Overview
Overview
Location & History
Koidu Holdings S.A. obtained an exploration licence (EXPL 4/04) over an approximately 88km² portion of ground in the Lower Bambara Chiefdom (Kenema District, Eastern Province of Sierra Leone) in May 2004.
The Tongo Field exploration licence area contains four historically documented and sampled diamondiferous kimberlite dyke zones (Kundu, Lando, Tongo and Peyima) and a blow at Peyima. In addition, the distribution of diamondiferous gravels associated with the drainage patterns suggests that other kimberlite sources could exist within the licence area.
Deforestation in the area is severe as a consequence of alluvial mining activities, which have been ongoing since 1953. The old SLST plant and tailings dumps are within the licence area and have been exploited by the local community as sources of scrap metal and additional mining opportunities.
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| Aerial photograph showing the Lando River and effects of artisanal mining on the Lando Dyke. |
Reconnaissance Survey and Aerial Photography
Soon after being awarded the Tongo Field exploration licence, a high level delegation from Government and Koidu Holdings S.A. visited the area to formally introduce the Company to the community and to outline future plans regarding bulk sampling of the dykes and the repair of the road linking Tongo and Koidu.
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| Public meeting held at the Tongo court barry introducing Koidu Holdings S.A. to the community. |
Tongo community is notified of the future plans regarding bulk sampling and road repair.
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Former Chief Administration Officer of Koidu Holdings, Sadiq Silla, addressing the Tongo community. |
After the public meeting, Koidu Holdings S.A. undertook an aerial survey of the licence area by helicopter, taking photographs and noting important features that would impact on the detailed planning and implementation of the proposed work programme. During the survey it was evident that significant damage to the environment had been caused by extensive commercial and artisanal mining over the past 50 years, and that the close proximity of villages to the dyke zones which were to be sampled would require careful consideration and interaction with the local community.
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| Aerial view of the Lando and Kundu dyke zone areas. |
Close proximity of houses to dyke zones.
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Significant artisanal mining activity currently in progress. |
Environmental Baseline Audit
Koidu Holdings S.A. appointed CEMMATS Group Limited to undertake the Environmental Baseline Audit in order to identify environmental and social issues that would need to be considered. CEMMATS conducted a preliminary site visit, from 11 to 13 June 2004 to determine the scope of work for their proposal and to initiate the public consultation and disclosure process. On approval of CEMMATS' proposal in August 2004, work on the Environmental Baseline Audit commenced.
Field investigations were conducted by CEMMATS within the study area and its immediate environs to obtain relevant data. The study included the following:
- CEMMATS addressed the local community and chiefdom authorities in order to explain the purpose and objectives of the study;
- Questionnaires were administered to residents in the villages within the study area to obtain data on several issues including water supply and quality, sanitation, socio-economic and socio-cultural issues;
- Noise level measurements were taken; and
- A field laboratory was set up for instant testing of water samples.
A final draft of the Environmental Baseline Report was received on 29 January 2005. Descriptions of the location, access, infrastructure and social issues given below were drawn from the Baseline Audit Report.
The main issues that emerged during CEMMATS' baseline study were:
- The project area comprises six settlements, namely: Kpandebu, Palima, Mavehun Tokpombu, Sandeyeima and Tongola. All are located and influenced by mining activities within the project area. A total of 680 households (4,555 people) occupy 250 houses within the licence area. Of these, 250 heads of households representing 2,041 people were interviewed by CEMMATS during the social survey.
- Artisanal mining is the main economic activity of a majority of the active male population in the area. During the survey, it was found that the main occupation of 38% of the household heads was mining, followed by 32% engaged in farming and 22% in business activities such as trading.
- Limited accessibility due to poor condition of roads between Tongo and Kenema and Tongo and Koidu;
- The airstrip requires rehabilitation;
- No telephone or postal services exist. Cellphone communication was introduced in October 2005;
- Public water supply infrastructure does not exist within the area. Water for domestic and other uses is obtained from shallow wells. Faecal-indicator bacteria were discovered in all the wells tested, in different proportions.
- There is no source of main power supply in Tongo. Small diesel driven generators supply power to the more affluent households;
- There are no hospital facilities. Only one community heath centre is in operation;
One of the most significant challenges ahead is the issue of the rights of artisanal miners. CEMMATs was asked to compile a register of all legal artisanal mining licences, the locations, owners, and date of issue and expiry of the licences. This register was included in the final draft of the Baseline Audit Report
CEMMATS held a focused group discussion with various stakeholders in the alluvial diamond mining industry in the area to inform them of the proposed exploration activities and obtain their views especially with respect to the artisanal alluvial operations. The meeting was attended by 57 stakeholders comprising miners, Diamond Dealers, Chiefs, Licence Holders, Bush Owners, Representatives of Peace Diamond Alliance, Mines Monitoring Officers and Mine Wardens.
In general, stakeholders were happy about the proposed exploration work and in particular they looked forward to the repair of the road between Tongo and Koidu. They viewed this development as a means of promoting trade with other chiefdoms in the Kono and Kenema Districts, and hence possibility of greater economic benefits.
Notwithstanding the above, the stakeholders also expect certain direct economic benefits such as employment, increased trading activities, better road infrastructure, better social and economic amenities such as health, education, micro-credit, housing and availability of good drinking water.
The stakeholders expressed the following concerns:
- Uncertainties about the fate of alluvial diamond mining licence holders whose land falls within the licence area;
- Benefits to land owners whose land falls within the licence area;
- Population influx;
- Relocation and its disturbances;
- Whether their land will ever be returned to them in a form suitable for agriculture.

Costs
The extent of the work undertaken and the costs involved in completing the bulk sampling programme and refurbishing the Koidu-Tongo road are significantly greater than those anticipated in the work programme and budget submitted with the application for the exploration licence. After obtaining the licence, a more detailed project plan and budget was completed, which indicated that approximately $830,000 over and above the $1,038,668 proposed in the application budget would be required to complete the programme within the planned six month period. However, with the significant delays to the work programme caused by the local community, the timing of activities which had been carefully planned to take into account the rainy season (during which the sampling area becomes virtually inaccessible) was severely affected, causing further delays while tasks planned for the dry season had to be attempted when the ground was soaked and swampy. These delays, as well as the additional expenditures on satellite imagery, geophysical surveys and contracting MSA Projects to oversee the sampling programme, brought the total project expenditure over the 36 month period to $5,371,567.