12 October 2014. Pending state Department of Environmental Protection approvals, a new mine will open in 2015 in the Alle-Kiski Valley but it won't produce coal. Allegheny Minerals Corporation, based in Kittanning, wants to open an underground limestone mine that will straddle the Armstrong-Butler County line.

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http://triblive.com/neighborhoods/yourallekiskivalley/yourallekiskivalleymore/6930030-74/mine-limestone-mining

 

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