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including redeployment of its wastewater systems from now to 2050. The cliffs in Ault are regularly retreating, under repeated attack from the sea wearing them away from the bottom, and rainwater infiltration eating away at them from the top, plus the combined effects of freezing and thawing. According to estimates, in some places, they are losing 30 to 50m every 100 years. Faced with this danger, the town was added to the Picardy cliffs risk prevention plan (prefectural order of 6 June 2013), which addresses the risk of coastal erosion and predicts changes to the coastline, as well as making...

An environmentally-responsible project for the Dunkirk Urban Authority. In recent years, since the enactment of the GEMAPI law (for the management of marine areas and flood prevention), the Dunkirk Urban Authority (CUD) has given priority to a global survey of its facilities located alongside coastlines and aquatic environments. It has established a long-term action plan for all the necessary upgrading and modernisation works to these facilities. In the municipalities of Grand-Fort-Philippe and Gravelines, the rip-raps and embankments of the Aa channel form part of this maintenance and renovation plan due to their advanced state of deterioration. The most frequently observed...

Congratulated by CASQY, one of the project managers. In the vicinity of Trappes, the RD10 departmental road, also known as the ‘Nationale 10’, is soon to ‘vanish’. It will be placed underground, a task involving considerable preparatory works, including the rerouting of water supply and wastewater networks, entrusted to the Normandy Regional Division by their respective project owners, SMG SEVESC and the Saint-Quentin-en-Yvelines Local Authority (CASQY). An impressive task...but not for SADE! Water supply network Rerouting the water supply networks required the laying of 725m of 150mm-diameter cast-iron tubes using conventional techniques and 1,500m of 600mm-diameter using trenchless works to...

...At a test site in Limonest, a municipality in the Métropole de Lyon. Early this year, the Centre-East RD, in partnership with its customer Eau du Grand Lyon [Lyon water authority], led a test worksite in preparation for the future of our activities. A growing alternative technical offer and a demanding customer The range of green equipment for public works has reached a level of maturity which enables us to seriously consider new leads for our activities. The determination of Métropole du Grand Lyon to move towards energy transition, in line with the regulation for Low Emission Zones, and the...

A new contract won by SETHA, in total Group synergy… In late 2020, SETHA’s Solutions & Services Department won a call for tender of a new kind. A contract involving water and services, but with a new customer, the City of Paris Real Estate Department. Spotlight on the order 1st February 2021 saw the first intervention by SETHA, which has signed a four-year contract to oversee preventative and remedial maintenance of the air-ejector systems for buildings belonging to the City of Paris: 70 sites, 250 installations, 130 air ejectors, 120 compressors Historical background… In the early 20th century, prior to...