Lai da Ova Spin is a compensation reservoir on the Spöl river at Zernez, Grisons, Switzerland. Its volume is 7.4 mio m³ and surface area 34 ha. The arch dam Ova Spin was completed in 1968 and has a height of 73 m.
Location: Zernez, Grisons
Primary inflows: Spöl
Primary outflows: Spöl
Catchment area: 385 km² (149 sq mi)
Basin countries: Switzerland
Surface area: 0.34 km² (0.13 sq mi)
Water volume: 7.4 million cubic metres (6,000 acre⋅ft)
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