Preview 1,957,998 motor carriers — every carrier FMCSA lists as active with at least one power unit, plus carriers whose registration went inactive within the last three years (inferred from MCS-150 filing dates). The full load is in progress, so this is how far it has got. Sourced from the FMCSA Motor Carrier Census. Data as of 2026-09-24.

MARKWEST ENERGY OPERATING COMPANY LLC

Doing business as MPLX G&P

USDOT 4151788
USDOT registration Active

Operating authority — FMCSA publishes no current status for this carrier. See FMCSA’s record.

Safety rating Not rated no compliance review on file
Hazardous materials No
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Insurance and operating authority

Required and on-file BI&PD liability amounts, cargo and surety bond filings, and the operating authorities this carrier holds.

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No roadside inspections or annual mileage on file, which is not enough data to compare with other carriers. That is normal for a small or recently registered carrier.

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Carrier details
Fleet and drivers
Power units
310
Trucks
155
Buses
0
Drivers
146
Drivers holding a CDL
0
What they run
Cargo authorised to carry
Operating range
Interstate, within 100 miles
Carrier operation
Interstate
Operation classification
PRIVATE PROPERTY
Annual mileage reported
100
Mileage year
2023
Registration
First on file
2023-11-01
Carrier last updated its record
2023-12-28
City
DENVER
State
CO
ZIP
80202-2137

More carriers in Denver, CO

Data as of 2026-09-24 · The official FMCSA record · About this data