While drilling in Chester County in the Marsh Creek State Park two weeks ago, Energy Transfer’s Mariner East 2X pipeline experienced an “inadvertent return”–nontoxic drilling mud coming up out of the ground where it’s not supposed to (see Mariner East 2X Construction Causes Another Drilling Mud Spill). In this case, the mud came up in a small section of the 535-acre Marsh Creek Lake. A few days later the PA Dept. of Environmental Protection (DEP) indefinitely suspended all drilling in that area (see PA DEP Suspends ME2 Pipe Drilling at Marsh Creek State Park). Energy Transfer is appealing the DEP’s suspension saying if they can’t restart soon, the hole already drilled will fill in and ultimately lead to even more environmental impacts than a little spilled mud.