Current projects

Port of Calais: sharing is caring!

27 January 2021
For the construction of the Calais cross-channel terminal’s public wastewater system. SEPD, the port operator, has selected the Boulogne-Sur-Mer Agency (Arras Regional Division), in partnership with Veolia, to build the system. From individual to shared Currently routed and treated using micro-plants, wastewater from the site’s 15 buildings, i.e. approx. 70m3/h, is set to be collected and discharged into the town’s shared system by next spring. This change of method requires the construction of custom infrastructure. New systems SADE’s teams built a 1.3km interlocking PVC CR16 ø200 tube gravity system including 55 manholes, a 1.3km, HDPE ø90 backflow system including 20...

SADE in the mountains…

27 January 2021
SADE in the mountains… Though ski resorts might not be opening back up right away, some will be ready and raring to go for the season because our Regional Divisions are hard at work! Thanks to fast work by our Metz and Lyon Regional Divisions, two resorts’ water systems are being given a major makeover. Water for snow-making machines: no SADE, no snowflakes! In Haut-Rhin, SMMGM (i.e. Markstein Grand-Ballon massif joint development agency) wanted to extend the Markstein ski resort’s snow-making system. To meet this demand and supply 9 new snow-making machines, the Metz Regional Division (Alsace Agency) set up:...

SADE on a (not so gentle) slope!

27 January 2021
The town of Beauvais is reinforcing one of its main clear wells supplying the town centre. Managed by the Beauvais Agency (Arras Regional Division) in collaboration with Veolia, this worksite involves the reinforcement of the connection of a well, located at the top of a slope, to the catchment wells and distribution system set up downhill. Technically speaking, it consists of the construction on the side of a slope on 30°-gradient (i.e. 60%) terrain over a 30m stretch, of two parallel underground cast-iron ø400 pipes, the first to supply and the second to distribute. A complex worksite The worksite was...

Back-up water supply at the Penly and Paluel nuclear power plants…

27 January 2021
Or how to build systems hoping that, just for once, they will never be needed… Securing fuel cooling ponds, in case of pump prime loss, is a key component of our post-Fukushima operations. At Penly and Paluel, the Normandy Regional Division is building the main systems for the Backup Water Supplies (BWS) to tackle this major issue. One process For both nuclear power plants, the BWS works in the same way. The process involves building capable infrastructure, irrespective of events (earthquake, flood, etc.) to route water - via a gravity system, i.e. using zero energy - from the existing basins...

Close-fit lining work in the Rabat Medina: season 2

27 January 2021
Rue 38 got all dressed up to the 9’s with the setup of the first liners. In our first episode, both the preparatory work and the routing of the liners were ongoing. In-field training, still provided by Cyrille MAUFAY, continued in December with the laying of the first stretches of close-fit lining. Rue 38 (a top priority in the programme prepared by Redal) was therefore transformed for a few days into a trenchless works demonstration area. The aim of the first drive was to rehabilitate a 30m, 300-diameter stretch between too shallow manholes. Every stage of the protocol was followed:...

Three more years with RTE…

27 January 2021
…with SADERTELEC, which renewed its framework agreement with the electricity transmission company. Do we still need to introduce SADERTELEC, our subsidiary that works exclusively for RTE, and whose headquarters are based in Marseille? A little history, all the same… It was back in 2009 that the Marseille Regional Division got in touch with the electricity transmission company, realising that burying very high voltage lines (63 to 400KV) was a fast-growing business. Our initial aim was to offer specific structural services, particularly microtunneling with STS. In 2013, a new entity was created to specifically focus on this business line: SADERTELEC. This...

Managing industrial wastewater discharge…

27 January 2021
No problem, SADE has got the skills! As part of a judicial enquiry led by OFB (the French Biodiversity Office or “environmental police”), DREAL (Direction Régionale de l'Environnement, de l'Aménagement et du Logement, i.e. Regional Environment, Development & Housing Directorate) issued formal notice to Gelagri, a Loudéac-based business, regarding its wastewater discharge management. Excerpt from Ouest France newspaper “Kilometres of stream have been polluted”, says Alain Marteil, chairman of Loudéac fishery (Côtes-d’Armor). “This is organic pollution spreading down from the Calouët stormwater basin that appears to have been discharged into the Ouest River level near La Ville Léo”, explains Jean...

A first for Lyon…

15 January 2021
In Lyon, Gantelet-Galaberthier has dug a tunnel 5 metres under the water table and 8 metres under natural ground level, using a standard sheltered technique with jet grouting in the soil mass. The Lyon subsidiary set itself the impressive challenge of creating the final section of these sewer mains along 180m! This is the first time a gallery has been dug using traditional methods in the alluvium of the Saône river. To achieve this, a technique had to be devised in order to create a waterproof underground mass, from surface level, around the future location of the gallery, enabling miners...

News from our girls and boys in Bouaké!

10 November 2020
SADE Group is bolstering Bouaké’s drinking water supply for PFO Africa, head of the consortium awarded the overall contract by the Ivory Coast Hydraulics Ministry. After work began on the site at the end of March 2020, COVID-19 put a real spanner in the works: repatriation, temporary site shutdown, plus new health & safety rules. The project practically ground to a halt for several months, leading to comprehensive reorganisation last July.  Since then, 3 teams armed with an impressive selection of excavation equipment have been working 6 days a week to meet the deadline: two Ø 1,200 teams and one...

Friedland shaft in Paris (Eole project)…

9 November 2020
A flagship worksite featuring an original technique developed by the experts of SADE Special Works. Currently, SADE Special Works is handling the earthworks for this 24.25m x 7.45m, 43m-deep rectangular shaft. Context Positioned in Paris on Avenue Friedland, which stretches from Boulevard Haussmann all the way to the Arc de Triomphe, the “Friedland shaft” will provide ventilation and emergency access for the future RER E regional express train station by 2022. It is nestled in a dense urban environment, surrounded by sensitive sites: RER Line A, which runs 4.85m from its walls and the many Haussmannian buildings lining the avenue....