The hazard study carried out in 2020 by the Geos office concluded that the upstream waterproofing of the empty reservoir dam must be restored in the medium term. In 2021, the CEBR decided to undertake studies to program the work integrating environmental and drinking water supply constraints. This work, for which Geos and Ingerop is the project manager, began in 2024 and includes:

• A preliminary phase of emptying the reservoir accompanied by dredging of the sediments;
• Rehabilitation work with drained reservoir, including the installation of a waterproofing geomembrane on the upstream facing of the dam, and the rehabilitation of the hydromechanical equipment of the bottom drain;
• The filling of the reservoir and the continuation of work on the ridge and downstream of the dam, including the resumption of civil engineering disorders.

The second largest court in France, the Bobigny judicial court is expanding with the construction of a new building, which will be linked to the historic building by several footbridges.

This triangular extension of more than 20,000 m2 is a major challenge for improving the court’s operations. A vast forecourt bordered by gardens will be laid out on the rest of the plot, creating a link with the city.

For this project, Ingerop is responsible for the following tasks: for HVAC, plumbing, electricity, lifts, external works, operation and maintenance, pre-synthesis, regulatory thermal calculations, BIM, as well as project management via its subsidiary Cicad.

Architect: PCA-Stream

Located in the heart of Grenoble’s peninsula, Wood is an innovative project in terms of energy consumption, ecological footprint and thermal comfort. The office building is located on a disused industrial site, allowing 454 m2 of green space to be regenerated. The project adopted a responsible design approach, using wood for the framework, posts
and beams, walls and cladding on the façades.

Wood uses renewable energies (geothermal and geocooling) and has been designed to be bioclimatic (natural ventilation, optimisation of natural light, etc.). The project also promotes biodiversity by integrating nesting boxes into the thickness of the façades. Wood won two awards at the Pyramides d’Argent: the Business Property Prize and the Regional Grand Prize. It is certified NF HQE Bâtiment Durable ‘Très Performant’, Ready to Osmoz, BEPOS Effinergie 2017, BiodiverCity, E+/C- (level E3C2) and RT2012 -77%.

Arcora, a subsidiary of the Ingerop Group, was responsible for the façade engineering.

Architect: ECDM Architects

The Ingerop Group’s knowledge of the hospital sector and its constraints enables it to propose functional and efficient architectures. That’s why the Moulins-Yzeure hospital centre chose our bid to restructure the facility.

The 7,700 m² project comprises:

• the construction of a new building to house the emergency department, the SAMU departmental call centre and the SMUR, with a helipad,
• the redevelopment of five existing floors, spread over three buildings, to create an outpatient unit, two medical units and a paediatric ward.

The entire operation is being carried out on an occupied site, with activities being maintained. The Ingerop teams are more specifically in charge of project management for the design (concrete structure, steel structure, external works, HVAC, electricity, medical fluids and sanitary plumbing).

Architect: Michel Remon & Associés

Bordeaux-Mérignac airport is planned to create a central, flexible infrastructure between the two historic terminals (halls A and B) by 2028. The new entity will enable the airport to aim for the best European standards in terms of passenger experience, with a simplified, intuitive and seamless journey.

With a view to modernisation, the project also aims to meet the latest regulatory safety requirements while ensuring that the facilities can be upgraded. This 21,000 m² building represents a major challenge in terms of creating a coherent, high-performance facility that can meet the challenges of decarbonisation. As well as shops and waiting areas, it will house a central screening checkpoint (PIF), a new hold baggage handling and control system (STB) and a series of offices.

The project will be carried out on an occupied site, without interrupting airport operations. Economically, the new terminal will also be the most ambitious building in the history of Mérignac.

Architect: Enia architects

Designed by architects Le Maresquier & Heckly in 1972, the Mirabeau Tower, located on the Seine quays in Paris’s 15th arrondissement, is currently undergoing a full renovation initiated by its owner, the GECINA group, in partnership with ORFEO and the architectural firm CRO&CO. With an area of approximately 37,900 m2 sdp (1), it comprises 17 office levels. The project aims to rethink the tower’s interior spaces to meet the needs of today’s and tomorrow’s users, including a complete renewal of all technical equipment. The main challenges being to improve visual comfort, summer comfort, as well as thermal and acoustic performance, this renovation incorporates a strong environmental ambition, including among other things:

• the objective of BREEAM and HQE Sustainable Building certifications, as well as the BBCA Renovation and BBC Effinergie labels,
• the implementation of a material reuse initiative,
• the use of renewable energy through the continuation of the existing geothermal loop.

(1) sdp: floor area

The project involved rebuilding the Apremont “needle” dam on the Saône in the Haute-Saône district near Gray.

Built in 1860 and then modernized from 1982 to 1984, the Apremont dam constitutes a retaining reservoir to supply a diversion canal (navigable) whose entrance is located about 200m upstream from the dam.

This dam consists of a fixed part 55m long (spillway) and a mobile part (needle dam) 51m long with 4 passes of 12m. A hydroelectric plant is located on the right bank.

The purpose of the project is to:

• to replace the existing “needle” dam with a functional and automated structure (2 main passes of 21m – flap gate solution and “Obermeyer” type hydro-gates solution),
• realize the restoration of the spillway, the existing structures of the dam which will remain in place and the protection against scouring,
• to build a fish pass of the 10 successive basins type, adjoining the right-hand side,
• to build an eel pass and a canoe pass,
• the construction of a dual-use footbridge, public and technical, on the dam.

EDF is the operator of the hydroelectric plants on the Rhine bays of Marckolsheim, Rhinau, Gerstheim and Strasbourg and, as consequence, in charge of the maintenance and upkeep of the banks on these reaches.

The work carried out consisted in protecting the internal side of the dikes, by preventing erosion by installing new riprap in order to:

• restore mechanical protection in weakened areas;
• re-establish banks with regular profiles (below and above the water level).

The underwater works were carried out from a floating pontoon equipped with a mechanical shovel. The external works were carried out from the crest of the dike.

The works lasted three years, on the left and right banks (on the German side).

To check and validate the works and define the work to come, the water level was lowered by about 1 m at the end of 2010

The Medical Complex of Saint-Nazaire gathers on this new hospital unit both the functional sectors of a Private Partner called “Mutuelle Atlantique” (private health-care insurance) and the hospital center of Saint-Nazaire (Public Partner).

This operation corresponds to a Private-Public Partnership. With a conventional hospital capacity of 830 beds, the Medical Complex has a traditional and multidisciplinary hospital activity allowing the regional population to benefit from cutting edge hospital services.

With an energy production unit of 6.4MW and a logistics center, the project includes the main departments on 4 levels:

• Emergency department, recovery department, Laboratory, surgery department, Intensive Care Unit of Cardiology, internal and […] multi-disciplinary medicine, Neonatology, Obstetrics, French blood bank.
• High tech. services:
  • Dialysis
  • Nuclear Radiotherapy
  • Conventional Imaging (MRI, Scanner)
  • Interventional Imaging for Neurology and cardiology
• Medical consultations department and patient rooms/beds
• An outdoor car park with 1800 spaces
• A Residential student building, outside the hospital complex.

The building is equipped with a heliport made of metal structure.

The Pasteur 2 new academic hospital gathers on a single site all the disciplines relating to emergency. They are shared between various poles: general emergency medicine and traumatology, neurosciences, cardiovascular, pneumo chest and metabolism.

These various poles have a capacity of 690 beds; they are served by a medical technical support. The shared resources include 25 operations rooms, 2 MRI, 2 scanners, 10 X-rays imaging rooms, 5 ultrasounds rooms, 6 interventional imaging rooms for neurology and cardiology, 77 beds for intensive cares.

The technical and functional links with other buildings are made by technical galleries and/or bridges.

The landscape integration and the respect of beautiful site elements are 2 important qualities of the project.

On July 18th, 2008, CUB assigned the Consortium to conduct the full engineering for the extension of the network of public transport with dedicated lane-tramway, together with the contract related to the transverse general studies and systems for the whole network extension.

The tramway network extension includes 15.2 kms of new tracks extending:

• Line A up to Mérignac-Les-Pins and the western by-pass (3.1 km),
• Line B up to the Alouette junction in Pessac (3.6 km) passing by the Haut-L’Evêque and Xavier Arnosan hospitals and the Alouette station,
• Line B up to the Activity Pole of northern Bordeaux (1 km),
• Line C towards the south up to Bègles (3.8 km) and towards the north up to the Bordeaux conference centre (3.7 km).

The mission includes full engineering services (from design to work supervision).

The extension towards Northern Bordeaux includes tramway crossing of the wet dock on a revolving bridge.

Structure engineering of special structure (double skin, roof light, top covering ),
Facade and facade access engineering

A project by Arcora, an Ingerop subsidiary