Safety Measurement System - Complete SMS Profile (U.S. DOT# 4151788)

MARKWEST ENERGY OPERATING COMPANY LLC

DBA: MPLX G&P

U.S. DOT#: 4151788

Number of Vehicles: 122
Number of Drivers: 135
Number of Inspections: 11

Safety Rating & OOS Rates

(As of 04/07/2026 updated daily from SAFER )

Not Rated

Out of Service Rates

Type	OOS %	National Avg %
Vehicle	20.0	23.4
Driver	0.0	6.7
Hazmat		4.4

Licensing and Insurance

(As of 04/07/2026 updated hourly from L&I )

Active For-Hire Authority
Type	Yes/No	MC#/MX#
Property	No
Passenger	No
Household Goods	No
Broker	No

BASIC Status (Public Property Carrier View)

Behavior Analysis & Safety Improvement Categories (BASICs) Based on a 24-month record ending March 27, 2026

On-Road Performance
0 Measure	Not Public	0 Measure	1.46 Measure	0 Measure	Not Public	0 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 0 Safety Event Group: No Safety Event Grouping Avg. PU × UF: 129.3 Segment: Straight Carrier	Not Public	Driver Inspections: 11 with HOS Compliance Violations: 0 Safety Event Group: 11-20 relevant driver inspections	Vehicle Inspections: 10 with Vehicle Maint. Violations: 3 Safety Event Group: 5-10 relevant vehicle inspections	Driver Inspections: 11 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 11 with Driver Fitness Violations: 0 Safety Event Group: 11-20 relevant driver inspections
Investigation Results
No Acute/Critical Violations Discovered	N/A	No Acute/Critical Violations Discovered	No Acute/Critical Violations Discovered	No Acute/Critical Violations Discovered	Not Public	No Acute/Critical Violations Discovered

Select a BASIC icon above to get details, or view your Complete SMS Profile.

Violation Summary

Violations: 3


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

393.100(c)	Failure to prevent cargo shifting	1	1	1	Vehicle Maint.
393.43DBMA	Brake - Breakaway not attached to the towing vehicle.	1	1	4	Vehicle Maint.
393.95(a)	No/discharged/unsecured fire extinguisher	1	0	2	Vehicle Maint.

Inspection History

Total Inspections: 11


Report			Vehicle			Measure
Inspection Date	Number	State	Plate Number	Plate State	Type	Severity Weight (SW)	Time Weight (TiW)

9/11/2025	KYCV44713257	KY	G1K913	KY	STRAIGHT TRUCK		2
Vehicle Maint. Violation: 393.43DBMA Brake - Breakaway not attached to the towing vehicle (OOS)						4 + 2 (OOS)
5/29/2025	PAXL00080558	PA	ZVR7263	PA	STRAIGHT TRUCK		2
Vehicle Maint. Violation: 393.95(a) No/discharged/unsecured fire extinguisher						2
5/14/2025	PAD411513475	PA	ZRV3068	PA	STRAIGHT TRUCK		2
3/18/2025	KYCV44860565	KY	G1K913	KY	STRAIGHT TRUCK		1
1/30/2025	KYCV44860482	KY	D9K960	KY	STRAIGHT TRUCK		1
11/20/2024	PAC051003668	PA	ZVR7263	PA	STRAIGHT TRUCK		1
11/7/2024	PAB122431228	PA	ZVR7263	PA	STRAIGHT TRUCK		1
10/30/2024	PAB314430439	PA	ZVR7263	PA	STRAIGHT TRUCK		1
9/11/2024	OH3275013964	OH	ZVR7263	PA	STRAIGHT TRUCK		1
5/14/2024	PAD405413505	PA	ZRV3068	PA	STRAIGHT TRUCK		1
Vehicle Maint. Violation: 393.100(c) Failure to prevent cargo shifting (OOS)						1 + 2 (OOS)
4/19/2024	KYCV44712368	KY	G1K913	KY	STRAIGHT TRUCK		1

Reviewed-Not Preventable Crash Activity (vehicles involved in crashes)

Total Number of Crashes: 0

This carrier has no crashes to display.

Crashes Included in SMS (vehicles involved in crashes)

Total Number of Crashes: 0

This carrier has no crashes to display.

Investigation Results

Acute/Critical Violations: 0

This carrier has no Acute/Critical violations to display.

Summary of Activities

The summary includes information on the 5 most recent investigations and 24 months of inspections and crash history.

Most Recent Investigation:
Total Inspections: 11
- Total Inspections without Violations used in SMS: 8
- Total Inspections with Violations used in SMS: 3
Total Crashes* : 0

*Crashes listed represent a motor carrier’s involvement in reportable crashes, regardless of the carrier’s or driver’s role in the crash. Continue for details.

Continue for more Crash, Inspection & Investigation Details

Carrier Registration

Flags

Carrier Registration Details Subject to General Threshold Update Registration Info

Enforcement Cases

(Six years as of 04/07/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 4151788

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 3/27/2026, updated monthly)

The summary includes information on the 5 most recent investigations and 24 months of inspections and crash history.

Most Recent Investigation: None	Total Inspections: 11 Total inspections without violations used in SMS: 8 Total inspections with violations used in SMS: 3	Total Crashes: 0*
	# Insp. OOS Driver Inspections 11 0.0% Vehicle Inspections 10 20.0% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 0 Towaway Crashes 0

*Crashes listed represent a motor carrier’s involvement in reportable crashes, regardless of the carrier’s or driver’s role in the crash. Continue for details.

Downloads

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Average PU × Utilization Factor (as of 3/27/2026, updated monthly)

The SMS normalizes the Unsafe Driving and Crash Indicator BASICs measure by carrier size (i.e., a hybrid power unit and vehicle miles travelled measure) to account for exposure. Carrier size is defined as average power units multiplied by the utilization factor.

129.3 Average PU × Utilization Factor = 129.3 Average Power Units × 1 Utilization Factor

Average Power Units
Utilization Factor

In order to account for changes in a carrier's fleet size during the previous 24 months an average power unit value is used in the calculation to determine a carrier's Unsafe Driving BASIC and Crash Indicator measures.

129.3 Average Power Units = 122 Current Power Units + 122 Power Units 6 Months Ago + 144 Power Units 18 Months Ago
3

The Utilization Factor is a multiplier that adjusted the average PU values based on the utilization in terms of VMT per average PU.

Determine Carrier Segment: Straight
Straight trucks/other vehicles constituting more than 30% of the total PU
U.S. DOT# 4151788 = 100% Straight trucks/other vehicles
Determine VMT per Average Power Unit
0 VMT per Average Power Unit = 100 VMT From Registration (MCS-150) ÷ 129.3 Average Power Units

Based on Step 1 and 2 calculate the Utilization Factor

Straight Segment
Meets Criteria	VMT per Avgerage PU	Utilization Factor
	< 20,000	1
	20,000 – 60,000	1 = VMT per PU ÷ 20,000
	60,000 – 200,000	3
	> 200,000	1
	No Recent VMT Information	1

Use of SMS Data/Information

FAST Act of 2015:

Readers should not draw conclusions about a carrier's overall safety condition simply based on the data displayed in this system. Unless a motor carrier has received an UNSATISFACTORY safety rating under part 385 of title 49, Code of Federal Regulations, or has otherwise been ordered to discontinue operations by the Federal Motor Carrier Safety Administration, it is authorized to operate on the Nation's roadways.

Safety Measurement System:

The data in the Safety Measurement System (SMS) is performance data used by the Agency and Enforcement Community. A symbol, based on that data, indicates that FMCSA may prioritize a motor carrier for further monitoring.

The symbol is not intended to imply any federal safety rating of the carrier pursuant to 49 USC 31144. Readers should not draw conclusions about a carrier's overall safety condition simply based on the data displayed in this system. Unless a motor carrier in the SMS has received an UNSATISFACTORY safety rating pursuant to 49 CFR Part 385, or has otherwise been ordered to discontinue operations by the FMCSA, it is authorized to operate on the nation's roadways.

Motor carrier safety ratings are available at http://safer.fmcsa.dot.gov and motor carrier licensing and insurance status are available at http://li-public.fmcsa.dot.gov/.