Hammergraben

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You can help expand this article with text translated from the corresponding article in German. (September 2011) Click [show] for important translation instructions. View a machine-translated version of the German article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:Hammergraben (Cottbus)]]; see its history for attribution. You may also add the template {{Translated|de|Hammergraben (Cottbus)}} to the talk page. For more guidance, see Wikipedia:Translation.

Hammergraben
Location
Country	Germany
States	Brandenburg
Physical characteristics
Mouth
• location	Großes Fließ
• coordinates	51°51′16″N 14°15′39″E / 51.8544°N 14.2608°E / 51.8544; 14.2608
Basin features
Progression	Großes Fließ→ Spree→ Havel→ Elbe→ North Sea

Hammergraben is a river of Brandenburg, Germany. It branches off the Spree in Cottbus, and flows into the Großes Fließ (a tributary of the Spree) in Schmogrow-Fehrow. It is used to flood Cottbuser Ostsee, a former open pit lignite mine, which is planned to become Germany's largest artificial lake by surface area.