Robertson's Ready Mix Ltd a California Limited Partnership
USDOT 256299 · MC-1040325 · Corona, California · Interstate for-hire carrier · 1,000+ power units
Robertson's Ready Mix Ltd a California Limited Partnership is a corporation based in Corona, California, registered with the FMCSA as an interstate carrier (private property, authorized for hire). It reports 1,239 power units and 1,239 drivers, which ranks it #11 by fleet size among 730 active for-hire carriers with 50+ power units headquartered in California. In the 24 months to Sep 24, 2026 its trucks were inspected 186 times – about 0.2 inspections per power unit. 14.4% of vehicle inspections and 4.5% of driver inspections ended with an out-of-service order, against 14.8% and 1.1% for carriers of the same size nationally. FMCSA records 17 reportable crashes in the last 24 months (8 injuries, 0 fatalities, 17 tow-away), or 1.4 per 100 power units versus 2.6 for its size band. Crash counts in FMCSA data do not indicate fault. Its registered cargo types are liquids / gases, commodities dry bulk.
Registration and contact
| Legal name | Robertson's Ready Mix Ltd a California Limited Partnership |
|---|---|
| DBA name | — |
| USDOT number | 256299 |
| Operating authority (docket) | MC-1040325 |
| Entity type | Private Property, Authorized for Hire |
| Operation | Interstate |
| Business type | Corporation |
| Physical address | 200 S Main St #200, Corona, CA 92882 |
| Phone | (951) 685-4600 |
| First registered | Mar 8, 1985 |
| Last MCS-150 update | Jul 22, 2025 |
| Hazmat carrier | Yes |
Check live authority, insurance and out-of-service status: FMCSA SAFER snapshot for USDOT 256299.
Fleet and drivers
| Equipment | Owned | Term-leased | Trip-leased |
|---|---|---|---|
| Straight trucks | 84 | 164 | 0 |
| Truck tractors | 806 | 185 | 0 |
| Trailers | 14 | 0 | 0 |
- 1.00 drivers per power unit (national median for 50+ unit fleets: 0.99).
- 0.0 trailers per tractor.
- 30,836,278 miles reported for 2024 – about 24,888 miles per power unit vs a 32,421 median for 1,000+-unit fleets.
- 72% of listed equipment is owned rather than leased.
- 1,239 CDL drivers; 9 drivers operate interstate beyond 100 miles, 0 within 100 miles.
Safety record
Roadside inspections Sep 25, 2024 – Sep 24, 2026; crashes Nov 1, 2024 – Oct 31, 2026. Benchmarks: 1,000+-unit for-hire carriers nationally (241) and California carriers with 50+ units (730).
| Measure | Robertson's Ready Mix Ltd a | Same size, US | CA average | |
|---|---|---|---|---|
| Vehicle out-of-service rate | 14.4% | 14.8% | 13.6% | about average |
| Driver out-of-service rate | 4.5% | 1.1% | 2.8% | 300% higher than average |
| Crashes per 100 power units | 1.4 | 2.6 | 2.8 | 48% lower than average |
| Inspections | 186 | 177 with a driver check, 167 with a vehicle check, 143 BASIC violations recorded, 4 hazmat-related | ||
| FMCSA safety rating | Satisfactory (rated Feb 1, 1989) | |||
Cargo carried
Similar carriers in California
Closest fleet size and cargo mix among California carriers in this directory.
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Granite Construction Company USDOT 216892 | Watsonville | 939 | 317 | 166 | 18.6% | 8 |
| C R & R Incorporated USDOT 531552 | Stanton | 1,127 | 811 | 183 | 15.6% | 22 |
| H F Cox Inc USDOT 228093 | Bakersfield | 379 | 220 | 390 | 3.4% | 5 |
| Baker Commodities Inc USDOT 34909 | Vernon | 366 | 251 | 212 | 16.3% | 11 |
| Hansen & Adkins Auto Transport Inc USDOT 568253 | Los Alamitos | 965 | 816 | 648 | 30.3% | 61 |
| Western Oilfields Supply Company USDOT 154740 | Bakersfield | 922 | 807 | 320 | 15.6% | 9 |
Other carriers near Corona
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Robertson's Transport Ltd a California LP USDOT 658075 | Corona | 374 | 424 | 277 | 36.8% | 33 |
| Villa Park Trucking Inc USDOT 400360 | Corona | 79 | 62 | 133 | 21.0% | 6 |
| West Coast Arborists Inc USDOT 1829579 | Anaheim | 750 | 749 | 120 | 22.1% | 5 |
| The Vons Companies Inc USDOT 212605 | Brea | 319 | 482 | 411 | 6.9% | 15 |
| Roy Miller Freight Lines LLC USDOT 12663 | Anaheim | 280 | 86 | 209 | 10.4% | 3 |
| SC Commercial LLC USDOT 3187286 | Orange | 249 | 291 | 317 | 9.4% | 7 |
| Cal State Auto Parts Inc USDOT 1276566 | Anaheim | 143 | 143 | 82 | 6.2% | 1 |
| S a Recycling LLC USDOT 1677730 | Orange | 120 | 62 | 57 | 31.2% | 3 |
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FAQ
What is the USDOT number of Robertson's Ready Mix Ltd a California Limited Partnership?
Robertson's Ready Mix Ltd a California Limited Partnership is registered with USDOT number 256299 and operating authority MC-1040325.
How many trucks does Robertson's Ready Mix Ltd a California Limited Partnership have?
It reports 1,239 power units (991 tractors, 248 straight trucks) and 14 trailers, with 1,239 drivers, on its last MCS-150 update (Jul 22, 2025).
Where is Robertson's Ready Mix Ltd a California Limited Partnership located?
Its registered physical address is in Corona, California 92882.
What is the out-of-service rate of Robertson's Ready Mix Ltd a California Limited Partnership?
Over 24 months, 14.4% of vehicle inspections and 4.5% of driver inspections resulted in an out-of-service order (same-size national average: 14.8% vehicle, 1.1% driver).
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Source: FMCSA Company Census File, SMS inspection file and Crash File (data.transportation.gov), refreshed 2026-11-04. Figures are as reported to FMCSA and may lag. How we calculate these numbers. Spotted an error? Carriers update their record with FMCSA via the MCS-150 form; see corrections.