MARKWEST ENERGY PARTNERS, L.P. is a natural gas distribution employer in CANONSBURG, 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 ENERGY PARTNERS, L.P.
4600 J BARRY COURT SUITE 500, CANONSBURG, PA, 15317
Parent: MPLX LP (13 locations)
Industry Benchmark
Data Insights
Inspection Breakdown
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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 ENERGY PARTNERS, L.P. 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 ENERGY PARTNERS, L.P. 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 Liberty Midstream & Resources, LLC — Canonsburg, PA — 1 federal record
- Bangluck Market — Los Angeles, CA — 1 federal record
- MPLX G & P — Cadiz, OH — 1 federal record
- MARKWEST HYDROCARBON LLC — KENOVA, WV — 1 federal record
- 60020 - MARKWEST HYDROCARBON LLC — SOUTH SHORE, KY — 1 federal record
- Banglar Tiger Security — SAIPAN, MP — 1 federal record
- TESORO LOGISTICS OPERATIONS LL — VANCOUVER, WA
- MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC — HICKORY, PA
- 68940 - MPLX TERMINALS LLC — LOUISVILLE, KY
- MARKWEST OKLAHOMA GAS CO., LLC — MCALESTER, OK
Other employers in Natural Gas Distribution within PA
- NISOURCE — SOMERSET — 2 federal records
- COLUMBIA GAS OF PENNSYLVANIA — PITTSBURGH — 2 federal records
- UGI UTILITIES INCORPORATED — READING — 2 federal records
- KINSLEY CONSTRUCTION INC. — RED LION — 2 federal records
- AIRGAS — PITTSBURGH — 2 federal records
- EQUITABLE GAS COMPANY, LLC — PITTSBURGH — 2 federal records
- UGI UTILITIES, INC. — BETHLEHEM — 2 federal records
- UGI UTILITIES, INC. — WILKES BARRE — 2 federal records
- MSL OIL AND GAS CORPORATION — LEWIS RUN — 1 federal record
- PEOPLE'S NATURAL GAS COMPANY — KITTANNING — 1 federal record
Industry context
The Bureau of Labor Statistics reports an industry-average Total Recordable Incident Rate (TRIR) of 1.9 for the natural gas distribution sector, with a Days Away, Restricted, or Transferred (DART) rate of 1.2.
Activity timeline
No federal enforcement activity has been recorded against this establishment in the past 10 years.
Frequently Asked Questions
- What is MARKWEST ENERGY PARTNERS, L.P.'s OSHA violation history?
- MARKWEST ENERGY PARTNERS, L.P. has 1 OSHA inspection on record with 0 violations and $0 in total penalties.
- How does MARKWEST ENERGY PARTNERS, L.P.'s safety record compare to its industry?
- MARKWEST ENERGY PARTNERS, L.P. operates in the natural gas distribution industry. The industry average Total Recordable Incident Rate (TRIR) is 1.9.
About this data
This profile aggregates federal enforcement records on MARKWEST ENERGY PARTNERS, L.P. of CANONSBURG, PA from 17 federal data sources. Records were found in 3 sources: OSHA workplace safety inspections, SEC XBRL companyfacts (parent financials), and BLS industry safety benchmarks. The remaining 14 sources were checked and found no matching records: WHD, MSHA, EPA, NLRB, OFLC, OFCCP, FMCSA, USAspending, SAM.gov, CMS, CPSC, NHTSA, UVA, SEC enforcement.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. The dataset was last refreshed on May 2, 2026. MARKWEST ENERGY PARTNERS, L.P. resolves to the parent rollup MPLX LP, which operates 13 establishments in our dataset.
This profile may be incomplete if MARKWEST ENERGY PARTNERS, L.P.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.