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Ralph Apeldoorn: Waterreservoir for power plant Vianden
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Ralph Apeldoorn: Stwlan dam
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Ralph Apeldoorn: Stwlan dam
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Ralph Apeldoorn: Lake Koman
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Ralph Apeldoorn: Sluizencomplex De Ganzepoot
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Ralph Apeldoorn: Forth and Clyde canal
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Ralph Apeldoorn: Caledonian Canal
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Ralph Apeldoorn: Neptune's Staircase
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Ralph Apeldoorn: Neptune's Staircase
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Ralph Apeldoorn: Neptune's Staircase
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Ralph Apeldoorn: Storfossdammen
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Vrangfoss sluser
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Ralph Apeldoorn: Kjeldal Sluse
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Ralph Apeldoorn: Hogga sluse
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Ralph Apeldoorn: Hogga sluse
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Ralph Apeldoorn: Hogga sluse
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Ralph Apeldoorn: Molenbeek dam
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Ralph Apeldoorn: Zijpersluis
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Ralph Apeldoorn: De Rijp
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Ralph Apeldoorn: Zaandijkersluis
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Ralph Apeldoorn: Zaandijkersluis
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Ralph Apeldoorn: Poelsluis Wormer
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Ralph Apeldoorn: Bartelsluis