Author(s)

S.J. van Vuuren

Abstract

During 2001 the Paris Dam (South Africa) was constructed in the Buvaan River to augment the flow for the extension of irrigation downstream from the dam. The dam has a height of 42 m, and an active storage capacity of 80 * lo6 m3. The wall is a double arch concrete structure. During the first filling in February 200 1, the water level was lowered by releasing water through the bottom outlets to allow access for the last construction work to be completed. Water was released through the two 1200 mm diameter outlets, controlled by a sleeve valve at the end of the line. In the outlet structure, water entered the outlet works through the bottom sluice gate (4 m2), while the gates at the upper two levels were closed. In the outlet pipe, just upstream from the sleeve valves, full-bore butterfly valves were installed as maintenance valves for the sleeve v

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