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Continue to ChatAllentown PA arena will use micropiles to mitigate sinkholes https://geoprac.net/2012/01/allentown-pa-arena-will-use-micropiles-to-mitigate-sinkholes/
Allentown PA arena will use micropiles to mitigate sinkholes https://geoprac.net/2012/01/allentown-pa-arena-will-use-micropiles-to-mitigate-sinkholes/