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|Length||64 km (40 mi)|
The Agger is a river in Germany, a right tributary of the Sieg in North Rhine-Westphalia. It is 64 kilometres (40 mi) long. Its source is in the Sauerland hills, near Meinerzhagen. It winds through the towns Engelskirchen, Overath and Lohmar. Near Siegburg the Agger flows into the Sieg.
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