Carrier profile · USDOT 4151788 · Updated Jul 18, 2026

Markwest Energy Operating Company LLC

DBA MPLX G&P

122 power unitsavg 6.6 yrRegional · 3 statesDENVER, CO96/100
AUTHORITY STATUS UNKNOWN
Verified linksmarathonpetroleum.comFMCSA SAFER

Operations & Lanes

Where this carrier actually runs, revealed by roadside-inspection geography over the last 24 months — not where they claim to operate, shown as state-level inspection density.

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional
revealed
States observed3
US states
Inspections · 24 mo10
PA busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base
DENVER, CO
1515 ARAPAHOE ST STE 1-600
Top corridor
PA ⇄ CO
PA 6 · KY 3 · OH 1
Density
fewermore
Shade = roadside inspections, last 24 mo.

State activity ranking· all 3 states · trailing 24 mo

Roadside inspections by state · MARKWEST ENERGY OPERATING COMPANY LLC · trailing 24 months
StateCoverageInspections
PAPennsylvania6
KYKentucky3
OHOhio1