Cottbuser Ostsee

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The Cottbuser Ostsee (Cottbus Eastern Lake; Lower Sorbian: Chóśebuski pódzajtšny jazor) is an artificial lake under development on the grounds of the former open-pit lignite mine de:Tagebau Cottbus Nord near Cottbus, Brandenburg, Germany.

Cottbus Eastern Lake
Cottbus Eastern Lake
Location	northeast of Cottbus, Brandenburg, Germany
Coordinates	51°47′10″N 14°25′01″E / 51.786°N 14.417°E / 51.786; 14.417
Type	flooded former open pit lignite mine
Part of	Lusatian Lake District
Primary inflows	Hammergraben (Spree)
Built	December 23, 2015 (2015-12-23) end of mining April 12, 2019 (2019-04-12) start of flooding
First flooded	April 12, 2019 (2019-04-12) begin of flooding December 31, 2030 (2030-12-31) end of flooding (planned)
Surface area	1,900 hectares (4,700 acres) (planned)
Average depth	2.5 to 3 metres (8 ft 2 in to 9 ft 10 in) (planned)
Max. depth	30 metres (98 ft) (planned)
Water volume	150,000,000 cubic metres (5.3×109 cu ft) (planned)
Surface elevation	61.8 metres (203 ft) above Normalhöhennull (planned)