Overview of the inadvertent return location, silt fence is utilized to contain additional mud coming to the surface
On September 8, Blackhill Energy informed the Pennsylvania Department of Environmental Protection (DEP) of an “inadvertent return” that occurred during horizontal drilling for the Brad-Tenn Loop Pipeline in Granville Township, Bradford County (see Pipeline Work in Bradford County Leaks ~430 Barrels of Drilling Mud). Blackhill reported that while drilling beneath Route 6 and Sugar Creek, they experienced a pressure issue. The company discovered that 18,000 gallons of nontoxic bentonite drilling mud had been lost. On September 29, 2025, Blackhill notified the DEP of a second inadvertent return of bentonite drilling mud from horizontal drilling, this time in West Burlington Township in Bradford County. The second leak was tiny.
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