No interruption of water supply
Similarly, the work to connect the network to houses required the total replacement of the existing pipes, which were cracked and made of asbestos, with new cast iron pipes. 35 connections were installed to serve each house. All of this was done without cutting off the water supply: the switchover to the new network was made after sanitation tests had been carried out. 300 tons of aggregates were transported from the mainland because the island has no quarries.
Recovering construction waste
Conversely, managing construction waste is also a challenge. To avoid having to store excavated material on the island or transport it to the mainland, Spac's teams decided to treat it on site and transform it into quality backfill. Once the water pipe had been laid, the cut was mixed with cement and added as backfill for the trenches. On-site waste recovery is both economical and practical, and helps limit the carbon footprint of construction projects.