MPLX Marcellus Utilization Hits 94%, Driving Gathering Expansion
In 2015, MPLX (i.e., Marathon Petroleum) bought out and merged with the Utica Shale’s premier midstream company, MarkWest Energy, for $15 billion (see MarkWest Energy Investors/Unitholders Approve Merger with Marathon). The “new” MarkWest, aka MPLX, now plays on a much larger stage, owning and operating major assets in the Permian Basin, the Bakken Shale, and the Marcellus/Utica. However, the M-U still plays a starring role for the company. MPLX recently issued its first quarter 2026 update. MPLX is seeing increased natural gas gathering throughput in both Marcellus and Utica, indicating robust upstream activity. Read More “MPLX Marcellus Utilization Hits 94%, Driving Gathering Expansion”
If a tree falls in a forest and no one is around to hear it, does it make a sound? Similarly, if a pipeline being drilled loses 28,500 barrels (1.2 million gallons) of nontoxic drilling mud into an abandoned coal mine void, does it matter? The environmental left is attempting to make a big deal out of MarkWest Liberty Midstream’s drilling project in Washington County, PA, in which the company has, over a series of 19 different episodes, lost a cumulative 28,500 barrels of nontoxic bentonite drilling mud into an old coal mine void as it drilled the Chiarelli to Imperial Pipeline Project, between October 2025 and January 2026. Bentonite is the same stuff used to make kitty litter and toothpaste. 
Pipelines in West Virginia (like most other states) pay property taxes. It’s a significant revenue generator for counties. There are many pipelines in Wetzel County, including three NGL pipelines owned and operated by MarkWest (aka MPLX) that connect to the Mobley Gas Plant. In 2022, MarkWest filed a tax return for the pipelines showing a 35% reduction in value due to less-than-forecasted pipeline usage, a concept called “economic obsolescence based on inutility.” The County Assessor for Wetzel County challenged MarkWest’s claim. 
In late 2015, MPLX (i.e., Marathon Petroleum) bought out and merged in the Utica Shale’s premier midstream company, MarkWest Energy, for $15 billion (see 
Last November, MDN brought you the great news that MPLX (aka MarkWest Energy) would file to build an expansion at its existing Harmon Creek facility in Smith Township, Washington County, PA (see 
Last November, three of five supervisors in Cecil Township (Washington County), PA, voted to ban all new fracking via a new setback (distance from well to nearest structure) requirement of 2,500 feet (see 
Marathon Petroleum’s MPLX, formerly MarkWest, operates five complexes in the Marcellus shale. One of the five is the Bluestone Complex in Butler County, PA. Bluestone gathers 200 million cubic feet per day (MMcf/d) of natural gas. Bluestone processes 400 MMcf/d of natural gas, separating methane from other hydrocarbons. The facility then further separates ethane (C2H6) from other NGLs like propane and butane in a process called C2+ fractionation—producing some 81,000 barrels per day. Yesterday, MPLX announced that the Bluestone plant has become the only U.S. natural gas processing facility to achieve the EPA’s ENERGY STAR Challenge for Industry. 
The SHALE INSIGHT® 2024 event was held from September 24 to 26 at the Bayfront Convention Center in Erie, PA. Attendees got an insider’s view from the nation’s foremost energy leaders and experts on shale development, environmental protection, pipeline investment, energy-driven manufacturing, and in-demand jobs. We brought you a few news items we noticed in mainstream media from the event, one about antis protesting outside the event (see 
In late 2015, MPLX (i.e., Marathon Petroleum) bought out and merged in the Utica Shale’s premier midstream company, MarkWest Energy, for $15 billion (see