CNX Resources Corp.plans to drop down the Shirley-Pennsboro System, which gathers Marcellus Shale natural gas in West Virginia, to CNX Midstream Partners LP (CNXM) for $265 million before the end of March. The system gathers gas for CNX across Doddridge, Tyler, Ritchie and Pleasant counties and recently was moving 180 MMcf/d. After it separated from Consol Energy Inc., CNX assumed full ownership of CNXM, formerly Cone Midstream Partners LP, by buying Noble Energy Inc.’s remaining interest in the system.