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.
Situada a unos 1.200 metros de altitud sobre el río Yalong, cerca de la ciudad de Panzhihua, la presa de Ertan es la mayor infraestructura hidroeléctrica jamás construida en China después de la de las 3 Gargantas, e hicieron falta casi 91 meses para completar la obra. Esta presa en arco de hormigón de doble curvatura parabólica de 240 metros de altura y 775 metros de longitud en la coronación forma parte de un proyecto de mayor alcance que consta de 11 presas. El proyecto global tiene como objetivo explotar el potencial hidroeléctrico de la región. Los 17.000 Gigavatios anuales que produce la presa ofrecen una alternativa a la producción de energía a partir del carbón, muy contaminante, y fomenta el desarrollo económico de la región de Sichuan.
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.
La presa de Yacyretá (la «tierra de la luna» en lengua guaraní) se encuentra en el río Paraná, en el extremo norte de Argentina, justo en la frontera con Paraguay. Se trata de una presa de tierra de unos 70 kilómetros de largo que cuenta con 4 obras principales de concreto de aproximadamente 3,4 millones de m3. Esta construcción se compone de una esclusa de navegación de 236 metros de longitud útil, de un aliviadero principal de 18 compuertas-segmento de 15 metros de ancho para un caudal de 55.000 m3/s, de una central hidroeléctrica dotada de 20 turbinas Kaplan de 9 metros de diámetro (producción anual de 17.000 GWh) y de un aliviadero secundario (sobre el segundo brazo del río Paraná) de compuertas-segmento, para un caudal de 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.
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.
