second half th century people think large barge navigate ruhr river convenient route mean attempt conduct transport coveted coal resource river beginning industrial revolution coal barge reach kettwig spring little later barge reach rhine mouth ruhrort barge draw upstream horse afterwardshowever ruhr generally navigable time large dam mill low dam fishing common spot coal transfer barge decrease quality coal considerably ndash quotcoal dustquot reach ruhrort building lock witten ruhrort change thisthe ruhr remain important route coal end th century time railway supersede itin ruhrschifffahrt player transport sell coal ruhr river germany profitably possible progress marker help position player ruhr barge important player furthest upriver allow conduct action phase game turn

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