Yemen’s National Water and Sanitation Authority mandated us to build a wastewater treatment plant with a capacity of 50,000 m³/day in the capital city of Sana’a. The project, located north of the capital city next to El Rahaba International Airport, included construction of an underground intake wastewater pipeline made of fibreglass that is 6 kilometres long and ranges in diameter from 1,200 to 1,500 millimetres, civil engineering for the filtration plant, construction of a 200,000-m³ storage pond for wastewater designed for irrigation purposes, and implementation of about 3 kilometres of cast-iron or fibreglass pipes ranging in diameter from 80 to 1,500 millimetres. The treatment plant includes a workshop, a back-up power station (4 MW), and an administrative building.
Supply drinking water to the cities of Muscat and Quriyat – that was the objective of this project entrusted to VINCI Construction Grands Projets by the Government of the Sultanate of Oman, which called for the construction of dams on the Wadi Dayqah some 80 kilometres from the capital city of Oman. The project included construction of a roller-compacted concrete main dam 572,000 cubic metres in volume, 75 metres high, and 435 metres long as well as an ancillary, earth-fill dam 960,000 cubic metres in volume, 48 metres high, and 360 metres long.
VINCI Construction Grands Projets was mandated by Hydro-Québec to build the Toulnustouc hydroelectric power plant. The project includes excavation work, heavy engineering concreting, electricity, and architecture.
The Eastmain-1 hydroelectric facility is made up of two hydroelectric power stations, a damn and a reservoir on the Eastmain River in Québec. This project was undertaken by the James Bay Energy Company for Hydro-Québec between 2002 and 2012.
Opened in 2007 and located 88 kilometers north of Nemiscau, in the Nord-du-Québec administrative region, the Eastmain-1 power station has an installed capacity of 507 megawatts.
JANIN ATLAS undertook the construction of the temporary Bypass Tunnel for the construction of Eastmain-1.
The Yaciretá/Yacyreta (the “cradle of the moon” in Guarani) Dam is located on the Paraná River in the northernmost part of Argentina near the border with Panama. It is a nearly 70 km long earth dam which includes four main concrete structures measuring almost 3.4 million cubic metres. This construction comprises a 236 m navigation lock, a main weir with 18 radial gates that are each 15 m wide and a discharge rate of 55,000 m3/s, a hydroelectric power plant with 20 Kaplan turbines with a diameter of 9 m (annual production of 17,000 GWh) and a secondary weir (on the second arm of the Paraná River) with radial gates and a discharge rate of 40 000 m3/s.
The Xiaolangdi hydroelectric power station on the Yellow River, located 180 kilometres from Zhengzhou, 40 kilometres from Luoyang, and 600 kilometres from Beijing, marks the achievement of a longstanding aspiration, namely, to “tame” the Yellow River, the cradle and scourge of Chinese civilisation.
The structure consists of a sloping earth-core rockfill dam 154 metres high and 1,317 metres long at the crest, a water intake 112 metres high and 278 metres wide, and an underground power plant 252 metres long, 26 metres wide, and 61 metres high. From 1994 to 1999, Dumez-GTM took part in building this power plant as the lead contractor in the joint venture in charge of the project. The primary objective was to control sedimentation in the Yellow River to mitigate its destructive flooding. One of the defining characteristics of this structure, however, is that it meets a multiplicity of objectives, including power-generation and improved use of water for agriculture in the region.
Ertan Dam, located at nearly 1,200 metres above sea level on the Yalong River, close to the city of Panzhihua, is the largest hydroelectric power-generation structure built in China after the Three Gorges Dam. Nearly 91 months were needed to complete it. This double-curvature concrete arch dam, 240 metres high and 775 metres long at the crest, is part of a much larger project consisting of 11 dams. The larger project is designed to put the region’s hydroelectric power-generating potential to use. Ertan Dam’s 17,000-gigawatt annual output capacity provides an alternative to coal, which is very polluting, and support economic development in the Sichuan region.
We were mandated by the Comisión Federal de Electricidad to construct a double-curvature arch dam measuring 207 metres high and 115 metres long at the ridge. This project included a diversion tunnel, a spillway tunnel capable of evacuating 3,000 m3/s, 2 tunnels (618 m long), a water intake, 21 kilometres of concrete-lined intake gallery, a surge chamber, a sloped penstock pipe and an underground plant equipped with two 146-megawatt turbines.
