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TUNISIA - DAM REHABILITATION

The consortium formed by the companies Société du Canal de Provence, COBA, AHT and SCET Tunisie was awarded the Project for Rehabilitation of the “Bou Heurtma” and “Laroussia” Dams, together with the Modernization of the “Medjerda-Cap Bon” General Irrigation Canal that departs from the “Laroussia” Dam. The works include Technical Assistance and subsequent Supervision of the Construction Works.

The Client is the “Direction Générale des Barrages et des Grands Travaux Hydrauliques (DGBGTH)”, and the project is financed by KfW, from Germany.

The SCP-COBA-SCET-AHT consortium’s offer was the best classified among the six bidding joint ventures. COBA is the Consortium leader, and is also responsible for the most important component of the studies, namely the heightening of “Bou Heurtma” Dam and the Repair of the “Laroussia” Diversion Dam.

“Bou Heurtma” Dam is a 45 m-high earthfill dam built in 1976, for irrigation of 5000 ha located downstream. Throughout its 50 years of operation, sediment deposits have resulted in a decreased net storage capacity of the reservoir, from the initial 120 hm³ to the current ≈ 90 hm³. One of the main objectives of COBA’s design is to restore the reservoir’s original storage capacity, resorting to the partial use of the dam’s original high freeboard, by installing a gate system in the existing spillway.


 

 

Lx, 31 Aug 2015