Grindstone Transportation Llc is an active interstate carrier based in San Juan, TX.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 11 | 0 | 0 |
| Tractors | 9 | 2 | 0 |
| Trailers | 11 | 0 | 0 |
| Total Power Units | 11 | ||
Distinct vehicles · 24 mo
vs 11 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 90% | 95% | Worse than most peers |
| HOS Compliance | 91% | 94% | Worse than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 62% | 79% | Around peer average |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 2 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Oct 1, 2025 | 0 | 0 | 1 | 1 |
| Jul 1, 2025 | 0 | 0 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 10 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 10, 2026 | TX | TRUCK TRACTOR | 0 | 0 |
| Mar 2, 2026 | MD | TRUCK TRACTOR | 0 | 0 |
| Feb 26, 2026 | TX | TRUCK TRACTOR | 7 | 1 |
| Dec 29, 2025 | TN | TRUCK TRACTOR | 2 | 1 |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 2 | 2.17 | — |
| HOS Compliance | 2 | 1.27 | — |
| Vehicle Maintenance | 3 | 6.00 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 6 states. Top state TX accounts for 40% of activity. Activity outside home state (TX): 60%.
+1 other state with fewer inspections
| 2 |
| Hours-of-Service Compliance | 2 | 2 | 0 |
| Unsafe Driving | 2 | 1 | 0 |
| Dec 1, 2025 |
| LA |
| TRUCK TRACTOR |
| 0 |
| 0 |
| Dec 1, 2025 | MD | TRUCK TRACTOR | 1 | 0 |
| Nov 15, 2025 | TX | TRUCK TRACTOR | 2 | 0 |
| Sep 2, 2025 | LA | TRUCK TRACTOR | 1 | 0 |
| Aug 24, 2025 | NC | TRUCK TRACTOR | 0 | 0 |
| Jul 28, 2025 | TN | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Feb 26, 2026 | 39311TL | Truck-Tractor lower rear mud flaps retroreflective sheeting / reflex reflective material requirements for vehicles manufactured after July 1997 | Vehicle Maintenance | — |
| Feb 26, 2026 | 39311TU | Truck-Tractor upper body corner requirements for retroreflective sheeting or reflex reflective material for vehicles manufactured after July 1997 | Vehicle Maintenance | — |
| Feb 26, 2026 | 393205A | Wheel/rim cracked or broken | Vehicle Maintenance | — |
| Feb 26, 2026 | 39345B2UV | Brake Hose or Tubing Chafing and/or Kinking Under Vehicle | Vehicle Maintenance | Yes |
| Feb 26, 2026 | 39355E | No or Defective ABS Malfunction Indicator Lamp for trailer manufactured after 03/01/1998 | Vehicle Maintenance | — |
| Feb 26, 2026 | 3939 | Inoperable Required Lamp | Vehicle Maintenance | — |
| Feb 26, 2026 | 3963A1 | Inspection repair and maintenance of parts and accessories | Vehicle Maintenance | — |
| Dec 29, 2025 | 39375A3TAOL | Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS | Vehicle Maintenance | Yes |
| Dec 29, 2025 | 3958E1PC | HOS - False record of duty status driver improper use of Personal Conveyance - Not OOS | Hours-of-Service Compliance | — |
| Dec 1, 2025 | 3958EHOSPCDOOS | HOS (Property) - Co-driver produces a false record of duty status with an apparent attempt to conceal hours. Explain | Hours-of-Service Compliance | — |