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Carrier profile · USDOT 3907306 · Data as of Oct 7, 2026

Grinding Rock Aggregates

Independence, CA · Intrastate (Non-Hazmat) carrier · Since 2022
No MC authorityNot rated by FMCSANo hazmat
Cargo carriedBuilding MaterialsConstruction
View on FMCSA SAFERCall (760) 878-5160
4
Power units
6
Drivers
1
Inspections · 24 mo
0
Crashes · 24 mo
55K
Annual miles
4 yr
Registered
100
/ 100
Clear to load

Operating legally with a clean record

No problems found in FMCSA authority, insurance, inspection or crash data.

How we scored it · 5 factors
Operating authority20/20
Insurance20/20
Out-of-service rates20/20
Crashes & rating20/20
Continuity & identity20/20

Composite of public FMCSA authority, insurance, inspection and crash records weighted against the national fleet. Decision support, not an official FMCSA safety rating.

Safety

FMCSA inspections & crashes · 24 mo · AS OF OCT 7, 2026
Vehicle out-of-service
—
National 22.26% · 0 of 1 inspections · needs 3+
Driver out-of-service
—
National 6.67% · 0 of 1 inspections · needs 3+
Crashes
0
0 fatal0 injury0 tow-away
Crash rate 0.00 per 1M mi
Total inspections
1
Driver inspections
1
Vehicle inspections
1
People injured
0
Fatalities
0
FMCSA rating
Not rated

Enforcement

FMCSA closed cases

Closed enforcement cases — case numbers, violation codes and the amount settled — are available after you create a free account.

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Authority & insurance

FMCSA L&I · AS OF OCT 7, 2026

No operating authority (MC/FF docket) on file. Private and intrastate carriers don't need one; interstate for-hire carriers and brokers do.

Equipment

SELF-REPORTED ON MCS-150
4
Power units
4
Trucks
—
Tractors owned
—
Trailers owned
6
Drivers
6
CDL drivers
Not registered for hazardous materials.

Operations & cargo

FMCSA CENSUS
Intrastate (Non-Hazmat)Private Property
Cargo carried
Building MaterialsConstruction
Annual mileage
55,000 mi (2023)

Identity & federal record

FMCSA census · MCS-150
USDOT
3907306
MC / docket
None
Legal name
Grinding Rock Aggregates
DBA
—
Entity type
Carrier
Operation
Intrastate (Non-Hazmat)
First registered
Jun 24, 2022
Last MCS-150
Dec 2, 2024
Safety rating
Not rated
Drivers (CDL)
6 (6)
Hazmat
No
Business type
—

Fraud & network signals

For review, not a verdict.

No prior revocation
FMCSA shows no link to a previously revoked authority.
Unique phone number
Not shared with any other active USDOT.
Unique email address
Not shared with any other active USDOT.
Unique street address
Not shared with any other active USDOT.

Frequently asked

What is Grinding Rock Aggregates's USDOT number?

Grinding Rock Aggregates's USDOT number is 3907306.

Is Grinding Rock Aggregates authorized to operate?

It does not hold MC operating authority, which private and intrastate carriers do not need.

What is Grinding Rock Aggregates's safety record?

Over the last 24 months: 1 roadside inspections, and 0 reportable crashes (0 fatal). Not rated by FMCSA.

How big is Grinding Rock Aggregates's fleet?

4 power units and 6 drivers per its MCS-150 filed Dec 2, 2024.

Where is Grinding Rock Aggregates located?

Grinding Rock Aggregates is located at 131 N Hwy 395, Independence, CA, 93526. Phone: (760) 878-5160.

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Source: FMCSA public records via the U.S. DOT Open Data Portal. Carrier Search presents the federal record and computed signals for decision support only. It is not an FMCSA safety rating and not a recommendation to use or avoid any carrier. Verify authority and insurance before tendering.