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The Berg water project was undertaken to augment the water supply of the Western Cape region of South Africa, and specifically that of the Greater Cape Town metropolitan area. It was the largest water supply scheme to be completed by the Water and Sanitation Department, City Of Cape Town.
Aurecon provided extensive management, technical and environmental input to this significant project as a member of the Berg River Consultants joint venture.
The project consists of the following principal components:
Particular innovations in the dam design include dynamic compaction of alluvial deposits in portions of the dam foundations and the use of articulated slabs with special water-stop features to cater for potential differential settlement.
One of the exceptional features of the outlet works is their ability to mimic the periodic natural floods that are necessary to mitigate the impact on the ecology and geomorphology in and around the river.
The plunge pool is used as an energy dissipator for the flood releases from the outlet works. Model studies were undertaken of both the spillway and the outlet works, resulting in significant refinement of the designs, including the provision of an aeration gallery in the spillway.
The Berg Water project featured planning and implementation which introduced significant achievements, such as the preservation of the associated ecological reserve, empowerment of local communities by sourcing skills and services locally and the forging of public partnerships.
The Berg Water Project has received four major awards to date.
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