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Chamera Hydroelectric Project
Implementation of the 540-MW Chamera Hydroelectric Project on the Ravi River in Himachal Pradesh was a joint undertaking by the National Hydroelectric Power Corporation of the Government of India and the Canadian International Development Agency. Hatch Energy was responsible for planning, design, project management, procurement, construction supervision and commissioning. An important element in the enterprise was the training of Indian engineers at Hatch Energy's offices in New Delhi and in Canada.
The site is rugged, located in an active seismic zone. A concrete arch gravity dam creates a head of 34 m and has a gated spillway and concrete-lined plunge pool. Excavation and tunneling was carried out largely in conditions that varied from fair to very poor, with rockbolts, shotcrete, mesh and steel ribs used to support the rock.
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The underground powerhouse contains three 180-MW units; a transformer gallery, also underground, accommodates nine 75-MVA, 400/13.8-kV units which feed a surface switchyard via a 400-kV oil-filled cable.

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