CASTLEROCK DEVELOPMENT A CALIFORNIA CORPORATION

USDOT 1050226 · San Luis Obispo, CA · Underwriter-grade risk snapshot

Operating statusActive

Lead priorityUnknown

Fleet2 power units · 2 drivers (2 trucks)

OperationC · PRIVATE PROPERTY

Current insurer—

Crashes / Inspections (24 mo)0 / 2

	Vehicle	Driver
This carrier	50.0% (1/2)	0.0% (0/2)
National average	22.3%	6.7%

⚠️ Above national average. Carriers with high OOS rates face premium surcharges and are more likely to shop for new insurance.

Address1540 MARSH ST SUITE 120
SAN LUIS OBISPO CA 93401

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Power units2

Drivers2 (2 CDL)

MCS-150 mileage10,000 (2022)

MCS-150 filedJul 17, 2025

HazmatY

Total inspections2

Out-of-service1

Vehicle OOS rate50.0%

Driver OOS rate0.0%

Total violations5

OOS violations0

Total crashes0

Fatal crashes0

Injuries0

Insurance agent? CASTLEROCK DEVELOPMENT A CALIFORNIA CORPORATION — get the full CA lead list.

Data as of Thu Oct 15 2026 00:00:00 GMT+0000 (Coordinated Universal Time). Source: FMCSA public filings, refreshed daily by Insight Carrier.