Delio Lake
46°04′42″N 8°45′19″E / 46.078262°N 8.755288°E / 46.078262; 8.755288Basin countries Italy Surface area 30 ha (74 acres) Surface elevation 930 m (3,050 ft) 
Delio Lake is a lake in the Province of Varese, Lombardy, Italy. At an elevation of 930 m, its surface area is about 30 ha (74 acres). It serves as the upper reservoir for the pumped-storage Roncovalgrande Hydroelectric Plant.
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