The project has a total capacity of 250MW and is expected to last between 60 to 80 years, according to the Dubai Media Office.
The consultancy contract covers design, hydro-geological, geological, environmental, geotechnical, and deep excavation studies. It also includes consultancy on deep-water tunnel designs, the dam and hydroelectric power station, the tender for material supply, supervision of construction work, site installation, on-site testing and commissioning.
“The hydroelectric plant costs $522.7 million. It is part of the Hatta Comprehensive Development Plan, launched by HH Sheikh Mohammed bin Rashid Al Maktoum, Vice President and Prime Minister of the UAE and Ruler of Dubai,” HE Saeed Mohammed Al Tayer, MD & CEO of DEWA, was quoted in the report.
Once complete, the power station is expected to generate electricity, by making use of the existing water stored in the Hatta Dam, which can store up to 1,716 million gallons, and an upper reservoir that will be built in the mountain that can store up to 880 million gallons. The upper reservoir will be 300 metres above the dam level.
During off-peak hours, turbines that use clean and cheap solar energy will pump water from the lower dam to the upper reservoir and in peak-load hours, when production costs are high, turbines operated by the speed of waterfall from the upper reservoir will be used to generate electricity and connect it to DEWA’s grid. The efficiency of power production will reach 90% with a 90-second response to demand for electricity.
Source : https://www.thebig5hub.com/news/2017/june/dewa-awards-158-million-hatta-consultancy-contract-to-edf/