Safety Measurement System - Complete SMS Profile (U.S. DOT# 684912)

PERCO ROCK COMPANY

U.S. DOT#: 684912

Address: 638 N IRON SPRINGS RD
CEDAR CITY, UT 84721
Number of Vehicles: 22
Number of Drivers: 12
Number of Inspections: 8

Safety Rating & OOS Rates AND Licensing and Insurance

As part of FMCSA’s IT modernization strategy, we are in the process of merging our data platforms to make it easier for you to find the information you need. During this transition, please refer to the links below for additional information about this carrier.

For licensing and insurance information, visit Motus: USDOT Registration System.
For safety rating and Out-of-Service (OOS) rates, visit SAFER.
If you are a motor carrier looking for your Inspection Selection System (ISS) value, log in to the FMCSA Portal.

BASIC Status (Public Property Carrier View)

Behavior Analysis & Safety Improvement Categories (BASICs) Based on a 24-month record ending August 28, 2026

On-Road Performance
0 Measure	Not Public	0 Measure	2.61 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: 17.7 Segment: Straight Carrier	Not Public	Driver Inspections: 8 with HOS Compliance Violations: 0 Safety Event Group: 3-10 relevant driver inspections	Vehicle Inspections: 7 with Vehicle Maint. Violations: 3 Safety Event Group: 5-10 relevant vehicle inspections	Driver Inspections: 8 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 8 with Driver Fitness Violations: 0 Safety Event Group: 5-10 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: 6


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

392.9A2-C	Cargo - Vehicle components or dunnage not secured	1	1	1	Vehicle Maint.
393.45B2-B-AIR	Air Brake - Hose/tubing damaged or not secured	1	0	4	Vehicle Maint.
393.45D-BAAL	Air Brake - Audible air leak at other than a proper connection	1	1	4	Vehicle Maint.
393.78A-WS	Washers - Inoperative washing system.	1	0	1	Vehicle Maint.
393.9A-LBL	Lighting - Backup lamp inoperative	1	0	6	Vehicle Maint.
396.5B-HWSL	Hubs - Wheel seal leaking	1	0	2	Vehicle Maint.

Inspection History

Total Inspections: 8


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

6/29/2026	KSHP00990593	KS	A010333	UT	TRUCK TRACTOR		3
5/18/2026	UT25FO001729	UT	032020SB	TX	STRAIGHT TRUCK		3
1/16/2026	CANDMP009994	CA	A005276	UT	TRUCK TRACTOR		2
Vehicle Maint. Violation: 396.5B-HWSL Hubs - Wheel seal leaking						2
Vehicle Maint. Violation: 393.45D-BAAL Air Brake - Audible air leak at other than a proper connection (OOS)						4 + 2 (OOS)
Vehicle Maint. Violation: 393.45B2-B-AIR Air Brake - Hose/tubing damaged or not secured						4
10/7/2025	AZXE05130233	AZ	A005224	UT	STRAIGHT TRUCK		2
10/7/2025	AZXC19360684	AZ	A065057	UT	STRAIGHT TRUCK		2
9/11/2025	UT25XH001442	UT	A029104	UT	TRUCK TRACTOR		2
9/12/2024	UT24XH001112	UT	A046974	UT	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.9A-LBL Lighting - Backup lamp inoperative						6
Vehicle Maint. Violation: 393.78A-WS Washers - Inoperative washing system.						1
9/12/2024	UT24XH001114	UT	A057198	UT	TRUCK TRACTOR		1
Vehicle Maint. Violation: 392.9A2-C Cargo - Vehicle components or dunnage not secured (OOS)						1 + 2 (OOS)

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: 2


Report			Vehicle		Crash				Measure = Sum of the Total Weight (TotW)
Date	Number	State	Plate Number	Plate State	Fatal	Inj.	Tow.	HM	Severity Weight (SW)	Time Weight (TiW)	Total Weight (TotW)

5/6/2025	UT2503386276	UT	A029104	UT	0	0	Yes	No	1	1	1
4/16/2025	UT2503228746	UT	A032091	UT	0	0	Yes	No	1	1	1

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: 8/21/2020 (Non-Ratable Review)
Total Inspections: 8
- Total Inspections without Violations used in SMS: 5
- Total Inspections with Violations used in SMS: 3
Total Crashes* : 2

*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

Carrier Registration Details Subject to General Threshold Update Registration Info

Inspection Selection System

For licensing and insurance information, visit Motus: USDOT Registration System.
For safety rating and Out-of-Service (OOS) rates, visit SAFER.
If you are a motor carrier looking for your Inspection Selection System (ISS) value, log in to the FMCSA Portal.

Enforcement Cases

(Six years as of 09/12/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 684912

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 8/28/2026, updated monthly)

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

Most Recent Investigation: 8/21/2020 (Non-Ratable Review)	Total Inspections: 8 Total inspections without violations used in SMS: 5 Total inspections with violations used in SMS: 3	Total Crashes: 2*
8/21/2020 (Non-Ratable Review) 10/8/2014 (Compliance Review) 12/17/2003 (Compliance Review) 6/29/2000 (Compliance Review)	# Insp. OOS Driver Inspections 8 0.0% Vehicle Inspections 7 28.6% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 0 Towaway Crashes 2

*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 8/28/2026, 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.

17.7 Average PU × Utilization Factor = 17.7 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.

17.7 Average Power Units = 22 Current Power Units + 22 Power Units 6 Months Ago + 9 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# 684912 = 36% Straight trucks/other vehicles
Determine VMT per Average Power Unit
396 VMT per Average Power Unit = 7,000 VMT From Registration (MCS-150) ÷ 17.7 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/.