License Plate IL 990539ST (Illinois) — River Rock Logistics Llc
USDOT 4016165 · 2018 Polar Tank Trailer
Recorded vehicle, plate and carrier history
These are dated observations in the records available to us. They do not establish ownership, a sale, a transfer date, or continuous use between observations. The latest observation may not describe today’s vehicle or carrier.
| Observed dates | VIN | Plate | Reported carrier |
|---|---|---|---|
| 2026-08-26 | 1PMS54324J1049689 | IL 990539ST | RIVER ROCK LOGISTICS LLC · USDOT 4016165 |
| 2026-07-17 | 1PMS54324J1049689 | IL 990539ST | FOUR CORNERS TRANSPORT LLC · USDOT 4173159 |
Evidence: FMCSA inspection observations and retained snapshots of our vehicle records. Coverage is incomplete; an unreported change cannot be dated from these records.
Most recently recorded carrier for this plate
River Rock Logistics Llc Active
- USDOT
- 4016165
- MC
- 1513569
- Status
- Active
- Type
- Motor Carrier
- Based in
- Wolfforth, TX
- Power units
- 5
- Drivers
- 8
- Inspections (24 mo)
- 8
- Crashes (24 mo)
- 0
- Vehicle OOS rate
- 50%
Carrier recorded at the latest inspection in the available records (2026-08-26). This does not establish current ownership or confirm that the carrier still operates this vehicle.
View full carrier profile →Authority, insurance & bonds, safety scores, crash history, inspections and the full fleet list.This plate has also been operated by 1 other carrier (listed below).
What this means
License plate IL-990539ST appears in FMCSA inspection records 2 times. Recorded on one vehicle: VIN 1PMS54324J1049689 (2018 Polar Tank Trailer). Operated by 2 different carriers (DOT numbers) over its inspection history. Most recent operating carrier: River Rock Logistics Llc (USDOT 4016165). Vehicle make on file: Polar Tank Trailer (POLAR MFG.) (SEMI-TRAILER). No out-of-service violations are recorded under this plate in the available inspection records. Other violations may still be present.
About this plate
Commercial license plate IL-990539ST (Illinois) appears in FMCSA roadside inspection records tied to one commercial vehicle. Inspection activity under this plate runs from 2026-07-17 to 2026-08-26. The latest inspection was in Colorado, a Level III — driver and paperwork only. That is outside the plate's issuing jurisdiction (Illinois).
Vehicle on this plate
This plate is associated with a single vehicle, a 2018 Polar Tank Trailer — VIN 1PMS54324J1049689 (semi-trailer).
Combined inspection & out-of-service record
Across all vehicles on this plate there are 2 inspections on FMCSA record. No out-of-service violations appear in the available records under this plate. This does not mean that every inspection was free of other violations.
Operators
2 carriers have operated vehicles under this plate (most recent first): River Rock Logistics Llc (USDOT 4016165) on 2026-08-26; Four Corners Transport Llc (USDOT 4173159) on 2026-07-17.