Gulch mining. Breckenridge district, Colorado Development; yield, Blue river. R.M.News. July 24, 1874 p.4 c.2 Formation; prospecting; development, Dry gulch. R.M.News. Aug. 18, 1885 p.6 c.1 Activities, gulches; list. R.M News.Apr. 18, 1861 p.2 c.1 Activities, Gulches; list; yield. R.M News.Dec. 13, 1960 p.4 c.1
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