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MarkWest Harmon Creek Gas Plant

Site Background

MarkWest Liberty Midstream & Resources LLC (Markwest) is currently authorized to operate its Harmon Creek Gas Plant under GP1-63-01011A and GP5-63-01011A. MarkWest has submitted a GP-5 modification application that, among other things, incorporates devices authorized under the GP-1.

The Harmon Creek Gas Plant is located at 123 Point Pleasant Road in Smith Township, Washington County.


On December 10, 2021, MarkWest submitted a GP-5 modification application for its Harmon Creek Gas Plant.

On February 23, 2021, DEP issued a technical deficiency letter to MarkWest.