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dam sluice gate hartbeespoort dam wall nature water cascade reservoir water release overflow cliff hartbeespoort dam south africa

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hydroelectric dam dam structure trees nature hydroelectric dam hydroelectric dam hydroelectric dam hydroelectric dam hydroelectric dam

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dam reservoir nature water power water outlook

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dam hydroelectric power plant mountain alpine dam wall barrage construction architecture gravity dam nature hydraulic engineering clean energy renewable energy

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dam water nature reservoir cement dam pouring

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glen canyon dam arch weight wall colorado river arizona lake powell dam dam dam dam dam dam

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