MARKWEST ENERGY OPERATING COMPANY LLC
DBA: MPLX G&P
Book with caution — review signals below
No hard OOS / revoked / uninsured blocker, but elevated risk signals need a human look before booking.
- OOS rate worse than size peers Driver and/or vehicle out-of-service rate is above the peer median.
- OOS rate better than size peers
Plain-text risk summary (print / paste)
TruckCodex risk summary — MARKWEST ENERGY OPERATING COMPANY LLC (USDOT 4151788) Verdict: CAUTION Book with caution — review signals below No hard OOS / revoked / uninsured blocker, but elevated risk signals need a human look before booking. Authority / census status: Active Blockers: (none) Cautions: • OOS rate worse than size peers — Driver and/or vehicle out-of-service rate is above the peer median. On file: • OOS rate better than size peers Source: https://truckcodex.com/usdot/4151788/ As of: Jul 18, 2026 Always confirm on FMCSA SAFER and L&I before tendering — TruckCodex mirrors public filings and can lag by up to a day.
TruckCodex · compliance grade
Compliance grade B
Composite of 3/5 scored components (mean 80/100). Expand for per-signal evidence. Heuristic — not an FMCSA rating or legal advice.
B
confidence 60% · 3/5 signals
Compliance grade B
Composite of 3/5 scored components (mean 80/100). Expand for per-signal evidence. Heuristic — not an FMCSA rating or legal advice.
Active census status with no OOS order or revoked authority on file.
Insurance/BIPD signal not resolved for this carrier.
NR reason: No active policies and no uninsured flag to score against.
Driver OOS 0% vs peer median 1.5% (better). Vehicle OOS 20% vs peer median 18.5% (worse). n=7759 same-size ACTIVE peers.
FMCSA has not assigned this carrier a formal safety rating. We do not invent one.
NR reason: No published FMCSA safety_rating.
No BMC-91 insurance-lapse watch classification on file for this USDOT.
TruckCodex compliance grade from authority, BIPD, peer OOS, FMCSA safety rating, and insurance-watch signals. Not legal advice. See methodology. Booking triage on this page: Caution.
No authority breakdown on file.
No active policies on file.
No BOC-3 filing on file.
Company profile
Fleet details (MCS-150)
| Vehicle type | Owned | Term leased | Trip leased |
|---|---|---|---|
| Trailers | 23 | 0 | 0 |
| Trucks | 122 | 0 | 0 |
Self-reported on the carrier’s Form MCS-150 (FMCSA Company Census).
Inspections (24 months)
All 12 inspections →| Driver | Vehicle | Hazmat | |
|---|---|---|---|
| Inspections | 10 | 10 | 0 |
| OOS inspections | 0 | 1 | 0 |
| OOS percentage | 0% | 10% | — |
| National average | 6.67% | 22.26% | 4.44% |
Roadside inspections in the last 24 months. National averages are FMCSA MCSAP reference rates (driver ~6.7%, vehicle ~23.4%, hazmat ~4.4%).
Carrier analysis & narrative context SEO summary, status notes, AI overview, and safety profiles
MARKWEST ENERGY OPERATING COMPANY LLC is a motor carrier based in DENVER, CO, registered with the FMCSA under USDOT 4151788. The carrier is currently active in FMCSA's records, and has not yet received a formal FMCSA safety rating. MCS-150 self-reporting puts the fleet at 122 power units and 135 drivers, with 12 roadside inspections on file and a peak out-of-service rate of 20.0%. Use this page to verify the carrier's authority and insurance, review its inspection and crash history, and cross-reference live data on FMCSA SAFER before booking a load or onboarding a partner.
Carrier is unrated
FMCSA has not assigned this carrier a formal safety rating. Use the inspection history and BASIC scores below to assess on-road performance.
MARKWEST ENERGY OPERATING COMPANY LLC is a large fleet, operating 122 power units and 135 drivers, based in Denver, CO. Across 10 roadside inspections in the last 24 months, the fleet recorded a 20.0% out-of-service rate, with no reportable crashes on file. no operating authority record was located.
10 roadside inspections over the last 24 months, up 900% versus the prior 24 months, concentrated in PA (6) and KY (3), with Level 1 inspections the most common.
20.0% out-of-service rate; led by Vehicle Maintenance (100.0% of violations); top code 393.100(c) (Failure to prevent cargo shifting) cited 1 times, 1 of them OOS.
The fleet comprises 122 power units (large fleet) and 135 drivers; Ford, GMC, and Chevrolet are the most-inspected makes.
Risk Signals
Out-of-Service rate vs same-size peers FMCSA roadside inspections, % placed out-of-service
Compared against 7,759 ACTIVE carriers operating 61–183 power units (±50% of this carrier's 122 unit fleet).
Inspection Analytics Monthly activity · BASIC mix · state map
Monthly Inspection Activity (24 months)
Violations by BASIC Category
Activity by State
| State | Inspections | OOS | OOS % | Last Inspection |
|---|---|---|---|---|
| Pennsylvania (PA) | 6 | 0 | 0.0% | May 1, 2026 |
| Kentucky (KY) | 3 | 1 | 33.3% | Sep 11, 2025 |
| Ohio (OH) | 1 | 0 | 0.0% | Sep 11, 2024 |
Vehicle Fleet Top makes and models observed in roadside inspections
SMS BASIC Scores FMCSA Safety Measurement System per-BASIC scores
| BASIC | Inspections | Serious | Measure | Percentile | Alert | As Of |
|---|---|---|---|---|---|---|
| Driver Fitness | 0 | — | 0.00 | 0 | — | Jul 13, 2026 |
| Controlled Substances / Alcohol | 0 | — | 0.00 | 0 | — | Jul 13, 2026 |
| Hours of Service | 0 | — | 0.00 | 0 | — | Jul 13, 2026 |
| Unsafe Driving | 0 | — | 0.00 | 0 | — | Jul 13, 2026 |
| Vehicle Maintenance | 2 | — | 1.55 | 2 | — | Jul 13, 2026 |
Higher percentiles indicate worse performance relative to peer carriers. Carriers at or above the FMCSA intervention threshold are marked ALERT.
Recent Inspections (12 rows) View all 12 →
| Inspection # | Date ▼ | State | Level | Station | Vehicle | Violations | Top Codes | OOS |
|---|---|---|---|---|---|---|---|---|
| 87736955 | May 1, 2026 | PA | 3 | WHITELEY TOWNSHIP PA |
FORD STRAIGHT TRUCK
|
0 | — | No |
| 85747387 | Sep 11, 2025 | KY | 1 | PRESTONSBURG |
GMC STRAIGHT TRUCK
|
1 | 393.43DBMA | Yes |
| 84826022 | May 29, 2025 | PA | 1 | SR 79 NB AT BRIDGEVILLE REST A |
FORD STRAIGHT TRUCK
|
1 | 393.95A | No |
| 84684776 | May 14, 2025 | PA | 1 | pa-i79-nb-mm-80-cranberry-twp---n |
FORD STRAIGHT TRUCK
|
0 | — | No |
| 84164870 | Mar 18, 2025 | KY | 1 | PRESTONSBURG |
GMC STRAIGHT TRUCK
|
0 | — | No |
| 83739434 | Jan 30, 2025 | KY | 1 | PRESTONSBURG |
CHEVROLET STRAIGHT TRUCK
|
0 | — | No |
| 83222392 | Nov 20, 2024 | PA | 1 | BRIDGEVILLE PA |
FORD STRAIGHT TRUCK
|
0 | — | No |
| 83115797 | Nov 7, 2024 | PA | 1 | SR 70 EB AT CLASVILLE WELCOME |
FORD STRAIGHT TRUCK
|
0 | — | No |
| 83051661 | Oct 30, 2024 | PA | 1 | SR 70 EB AT CLASVILLE WELCOME |
FORD STRAIGHT TRUCK
|
0 | — | No |
| 82645120 | Sep 11, 2024 | OH | 3 | ROADSIDE |
FORD STRAIGHT TRUCK
|
0 | — | No |
| 81618945 | May 14, 2024 | PA | 1 | pa-i79-nb-mm-80-cranberry-twp---n |
FORD STRAIGHT TRUCK
|
1 | 393.100(c) | Yes |
| 81394698 | Apr 19, 2024 | KY | 1 | PRESTONSBURG |
GMC STRAIGHT TRUCK
|
0 | — | No |
Top Stations & Violation Codes Where this carrier gets inspected and what they get cited for
Most-Inspected Stations
| Station | State | Inspections | OOS |
|---|---|---|---|
| PRESTONSBURG | KY | 4 | 1 |
| SR 70 EB AT CLASVILLE WELCOME | PA | 2 | 0 |
| ROADSIDE | OH | 1 | 0 |
| BRIDGEVILLE PA | PA | 1 | 0 |
| SR 79 NB AT BRIDGEVILLE REST A | PA | 1 | 0 |
| WHITELEY TOWNSHIP PA | PA | 1 | 0 |
Top Violation Codes Cited
| Code | Description | Category | Cited | OOS |
|---|---|---|---|---|
| 393.100(c) | Failure to prevent cargo shifting | Vehicle Maintenance | 1 | 1 |
Related Records Cross-references to every adjacent page
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Colorado carriers
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Stations in Colorado
Where this carrier might be inspected
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12 inspections
Full roadside inspection history
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Fleet recall search
NHTSA recalls covering this fleet's vehicle years/makes
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File a complaint
Open the FMCSA National Consumer Complaint form for this carrier
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How FMCSA safety ratings work
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FMCSA compliance filings guide
MCS-150, insurance, and authority filing requirements
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Roadside inspection rights
What drivers and carriers can expect during a stop
How to verify MARKWEST ENERGY OPERATING COMPANY LLC
- Verify USDOT and MC numbers match the carrier's documents. Compare the USDOT number and MC docket on this page to the numbers on the carrier's invoice, rate confirmation, or load-board listing. A mismatch between the carrier's claimed numbers and the registered legal name is the single most common red flag.
- Check active operating authority and insurance status. Confirm the Authority Records show at least one ACTIVE docket for the type of operation you're booking, and that the Active Insurance card lists a current BIPD/Primary policy. A revoked authority or uninsured carrier cannot legally operate.
- Review safety rating and SMS BASIC scores. Check the carrier's FMCSA safety rating (if any) and the SMS BASIC table. A high percentile in any BASIC category — especially Unsafe Driving, HOS, or Vehicle Maintenance — is worth investigating before tendering a load.
- Examine inspection and crash history. Open the Inspection History and Crash History subpages for the full record. Look for patterns: repeat OOS findings on the same unit, multiple crashes in a short window, or violations clustered in one BASIC category.
- Cross-reference real-time data with FMCSA SAFER. For the most current snapshot — within 24 hours of any insurer filing or authority change — click through to the FMCSA SAFER lookup. TruckCodex mirrors SAFER and L&I daily; SAFER itself reflects filings within 24 hours.
Frequently asked questions about MARKWEST ENERGY OPERATING COMPANY LLC
Is MARKWEST ENERGY OPERATING COMPANY LLC an active motor carrier? ▾
What is MARKWEST ENERGY OPERATING COMPANY LLC's safety rating? ▾
How many inspections has MARKWEST ENERGY OPERATING COMPANY LLC had? ▾
What is MARKWEST ENERGY OPERATING COMPANY LLC's out-of-service rate? ▾
Where is MARKWEST ENERGY OPERATING COMPANY LLC based? ▾
Does MARKWEST ENERGY OPERATING COMPANY LLC have valid operating authority? ▾
How many trucks and drivers does MARKWEST ENERGY OPERATING COMPANY LLC operate? ▾
Has MARKWEST ENERGY OPERATING COMPANY LLC had any crashes? ▾
About FMCSA carrier records
Every commercial motor carrier operating in the United States is required to register with the Federal Motor Carrier Safety Administration (FMCSA) and obtain a USDOT number. The USDOT number is a permanent, unique identifier — once assigned, it stays with the carrier for life and is never reissued to another company. Carriers must update their registration every two years on Form MCS-150 to keep their address, fleet size, and operating data current.
Carrier safety data lives in FMCSA's Motor Carrier Management Information System (MCMIS): roadside inspections, crashes, out-of-service findings, and the seven Behavior Analysis and Safety Improvement Categories (BASICs) that make up the SMS scoring methodology. For-hire carriers must also hold operating authority — an MC, FF, or MX docket number — which is separate from the USDOT number and requires continuous insurance and BOC-3 process-agent filings to remain active.
TruckCodex mirrors FMCSA's public SAFER and L&I systems on a daily refresh cycle. Every record on this page reflects what FMCSA has on file. We do not edit or modify carrier data — for real-time confirmation immediately before a transaction, click through to the FMCSA SAFER lookup linked in the related records section above. Safety ratings, when present, come from formal compliance reviews; most active carriers have not been reviewed and are correctly listed as unrated.
Data sources & freshness
TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.
Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.
Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).
Cross-border carrier registry and Canadian recall campaigns where applicable.
TruckCodex is an independent aggregator; it is not affiliated with FMCSA, NHTSA, EIA, or Transport Canada. Always verify compliance-critical information directly with the originating agency.