Bagatelle dam

Supply of drinking water to the capital and the downstream areas
Bagatelle dam
Context & Issues

Lying across the Terre Rouge river in Mauritius, the 2.5 km-long Bagatelle Dam was built with a view to remedying drinking water shortages in the Port-Louis and lower Plaines-Wilhems area. The project was completed in 2017, when the dam’s reservoir was filled. 

Project characteristics
  • Volume of the reservoir: 14 Mm3
  • Earth and rockfill dam: length: 2.5 km
  • Water intake tower, bottom outlet and morning glory spillway (capacity: 450 m3/s)
  • Cut-off wall: depth: 30 m, length: 2.4 km