Basic Environmental Assessment for Desilting and Rehabilitation of Watercombe Dam

The scope of work for this project is to remove the sand and sludge materials accumulated in the dam. The existing dam is approximately 378.22m long. The appointed contractor shall be responsible for the overall work and not limited to:
• Management of material (supply, offloading, storing)
• Resource management (people and plant)
• Clearing of the site;
• Traffic Accommodation;
• Excavation works
• Reinstatement and rehabilitation of the watercourse embankments.
• All works shall comply with permits requirements and according to the specifications and the contractor should ensure that the completed works satisfy the expectations of JW, community and authorities.

Desilting of the dam
• The river will be diverted from portion 79 through to portion 82 in order for the work to be undertaken.
• All materials that are within the dam will be removed and stored temporarily on portion 81 and 82 for reuse, and should there be excess material remaining on site, the materials will be disposed of at the registered landfill site.
• The test will be taken before disposal of all soil materials in order to ascertain if they will be disposed of as general or hazardous waste.
• The excavator will dig 2-3m deep near the dam wall within portion 82, one and half metres deep on portion 81 and 1m deep at portion 79 in order to restore the dam capacity.