MPLX Marcellus Proc. Plants 96% Full, Harmon Creek III Starts Up

MPLX LP — the Findlay, Ohio midstream giant that bought MarkWest back in 2015 and, in doing so, became the biggest gas processor in the Marcellus/Utica — posted second quarter 2026 results on Aug. 4. Buried in the usual pile of EBITDA-speak is a set of numbers M-U landowners and drillers should care about: MPLX's Marcellus processing plants ran at 96% of capacity, its Utica gathering systems moved 18% more gas than a year ago, and a brand-new 300 MMcf/d processing plant is starting up in southwest Pennsylvania this month. Full disclosure up front: MPLX is not building all this steel because it likes the scenery. It's building it because Appalachian producers are drilling again.

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