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Capacity of a windmill:
40 m3/min = 40.000 litres/min

Capacity of the Nederwaard pumps:
1350 m3/min = 1.350.000 litres/min

Capacity of the Overwaard pumps:
1500 m3/min = 1.500.000 litres/min

Length of the blades: 13 meters
Windmills left in Holland: 1000

Costs of maintenance per windmill:
on average $ 50.000 per year

Minimum space between buildings and the windmills:
400 meters



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