
1) Arnsberg is on it 2) Bombed area in WWII 3) Coal region 4) Dortmund river 5) Dutch waterway 6) Dutch river 7) Dutch watercourse 8) Essen basin 9) Essen river 10) European coal area 11) European industrial valley 12) European mining center 13) European steel center 14) European valley 15) European river
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https://www.crosswordclues.com/clue/ruhr

- a tributary of the Rhine
- a major industrial and coal mining region in the valley of the Ruhr river in northwestern Germany
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The Ruhr (ˈʁuːɐ̯, Ruhrgebiet), or the Ruhr district, Ruhr region or Ruhr valley, is an urban area in North Rhine-Westphalia, Germany. With a population density of 2,800/km² and a population of some eight and a half million, it is the largest urban agglomeration in Germany. It consists of several large, industrial cities bordered by the river...
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http://en.wikipedia.org/wiki/Ruhr
[department] Ruhr is the name of a département of the Grand Duchy of Berg, a satellite state of the First French Empire, in present day Germany. It was named after the river Ruhr, which flows through the département. The capital was Dortmund. == Further reading == ...
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http://en.wikipedia.org/wiki/Ruhr_(department)
[river] The Ruhr is a medium-size river in western Germany (North Rhine-Westphalia), a right tributary (east-side) of the Rhine. The source of the Ruhr is near the town of Winterberg in the mountainous Sauerland region, at an elevation of approximately 2,200 feet (670 m). It flows into the lower Rhine river at an elevation of only 56 feet (...
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http://en.wikipedia.org/wiki/Ruhr_(river)

river and major industrial region along its course, North Rhine-Westphalia Land (state), western Germany. The river, an important tributary of the ... [10 related articles]
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http://www.britannica.com/eb/a-z/r/77

[
n] - a tributary of the Rhine 2. [n] - a major industrial and coal mining region in the valley of the Ruhr river in northwestern Germany
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http://www.webdictionary.co.uk/definition.php?query=Ruhr
Ruhr Valley noun a major industrial and coal mining region in the valley of the Ruhr river in northwestern Germany
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https://www.encyclo.co.uk/local/20974

River in Germany, length 235 km/146 mi. It rises in the Rothaargebirge Mountains at the eastern boundary of North Rhine-Westphalia, and flows west, past Witten, Essen, and Mülheim, to join the Rhine at Duisburg. The Ruhr Valley, a metropolitan industrial area, produces petrochemicals, cars, iron, and steel at Duisburg and Dortmund;...
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https://www.encyclo.co.uk/local/21221

a river in W Germany, flowing NW and W into the Rhine. 144 mi. (232 km) long. · a mining and industrial region centered in the valley of the Ruhr River.
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https://www.infoplease.com/dictionary/ruhr
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