MARKWEST LIBERTY GAS GATHERING, L.L.C. is an employer in WASHINGTON, PA. Federal records show 1 OSHA inspection with 0 violations and $0 in penalties. All data sourced from public federal enforcement records.
Data sourced from OSHA, DOL WHD, MSHA, EPA ECHO, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA, and the UVA Corporate Prosecution Registry. Last updated: May 2, 2026.
MARKWEST LIBERTY GAS GATHERING, L.L.C.
800 WESTERN AVENUE, WASHINGTON, PA, 15301
Parent: MPLX LP (13 locations)
Data Insights
Inspection Breakdown
Motor Carrier Safety (FMCSA)
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Inspection History
No inspection records found.
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Data aggregated from public federal enforcement and program records (OSHA, WHD, MSHA, EPA, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA) plus the UVA Corporate Prosecution Registry. Employer profiles matched by name and location — matching errors may occur. Risk scores computed by FastDOL, not official government assessments. OSHA citations typically appear 3-8 months after the inspection, so very recent enforcement actions may not yet be reflected. Data provided as-is. Report a data error.
Part of a larger organization
MARKWEST LIBERTY GAS GATHERING, L.L.C. is one of 13 establishments in our dataset that roll up under the parent organization MPLX LP. MPLX LP is a SEC public reporter (MPLXP), with most recent reported revenue of $13.0B.
Federal enforcement records on MARKWEST LIBERTY GAS GATHERING, L.L.C. represent activity at this specific establishment. The full enforcement footprint of MPLX LP across all 13 of its tracked locations is viewable on the parent profile.
Other establishments operated by MPLX LP
- MARKWEST HYDROCARBON LLC — KENOVA, WV — 1 federal record
- Banglar Tiger Security — SAIPAN, MP — 1 federal record
- MPLX G & P — Cadiz, OH — 1 federal record
- Bangluck Market — Los Angeles, CA — 1 federal record
- 60020 - MARKWEST HYDROCARBON LLC — SOUTH SHORE, KY — 1 federal record
- MarkWest Liberty Midstream & Resources, LLC — Canonsburg, PA — 1 federal record
- TESORO LOGISTICS OPERATIONS LL — VANCOUVER, WA
- MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC — HICKORY, PA
- 68940 - MPLX TERMINALS LLC — LOUISVILLE, KY
- MARKWEST ENERGY PARTNERS, L.P. — CANONSBURG, PA
Other employers in this industry within PA
- MW LOGISTICS SERVICES LLC — WASHINGTON — 2 federal records
- ELKHORN INVESTMENTS, LLC — CLARENDON — 1 federal record
- KC MIDSTREAM SOLUTIONS, LLC — ENDEAVOR — 1 federal record
- PAPCO, INC. — CLARENDON — 1 federal record
- PIONEER DRILLING — BLOSSBURG — 1 federal record
- DECKER DRILLING INC. — JEFFERSON — 1 federal record
- DEVONIAN RESOURCES, INC. — CRANBERRY
- EQT PRODUCTION COMPANY — JEFFERSON
- HELMERICH & PAYNE — SUSQUEHANNA
- HILLCORP ENERGY COMPANY — NEW CASTLE
Activity timeline
No federal enforcement activity has been recorded against this establishment in the past 17 years.
Frequently Asked Questions
- What is MARKWEST LIBERTY GAS GATHERING, L.L.C.'s OSHA violation history?
- MARKWEST LIBERTY GAS GATHERING, L.L.C. has 1 OSHA inspection on record with 0 violations and $0 in total penalties.
About this data
This profile aggregates federal enforcement records on MARKWEST LIBERTY GAS GATHERING, L.L.C. of WASHINGTON, PA from 17 federal data sources. Records were found in 3 sources: OSHA workplace safety inspections, FMCSA motor carrier safety, and SEC XBRL companyfacts (parent financials). The remaining 14 sources were checked and found no matching records: WHD, MSHA, EPA, NLRB, OFLC, OFCCP, USAspending, SAM.gov, CMS, CPSC, NHTSA, UVA, SEC enforcement, BLS.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. The dataset was last refreshed on May 2, 2026. MARKWEST LIBERTY GAS GATHERING, L.L.C. resolves to the parent rollup MPLX LP, which operates 13 establishments in our dataset.
This profile may be incomplete if MARKWEST LIBERTY GAS GATHERING, L.L.C.operates under multiple legal names, files under variations our entity-matching rules don't yet cover, or maintains records below current matching thresholds. To report a missing record or correction, email corrections@fastdol.com.