Koster Grain Inc is an active interstate carrier based in Carroll, IA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 21 | 0 | 0 |
| Tractors | 21 | 0 | 0 |
| Trailers | 41 | 0 | 0 |
| Total Power Units | 21 | ||
Distinct vehicles · 24 mo
vs 21 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% | 92% | Worse than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 77% | 95% | Worse than most peers |
| Controlled Substances | 100% | 100% | Worse than most peers |
| Vehicle Maintenance | 89% | 95% | Worse than most peers |
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 | 3 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Oct 1, 2025 | 0 | 0 | 1 | 1 |
| Jul 1, 2025 | 0 | 1 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 16 | 7 | 3 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Feb 26, 2026 | IA | TRUCK TRACTOR | 3 | 0 |
| Dec 8, 2025 | IA | TRUCK TRACTOR | 1 | 1 |
| Sep 5, 2025 | IA | TRUCK TRACTOR | 9 | 1 |
| Aug 6, 2025 | IA | TRUCK TRACTOR | 1 |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 9 | 4.57 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 6 | 12.63 | — |
| Driver Fitness | 1 | 0.17 | — |
| Controlled Substances | 1 | 0.43 | — |
| 4.44% |
Where they run
Inspected in 1 state. Top state IA accounts for 100% of activity. Activity outside home state (IA): 0%.
| Unsafe Driving |
| 13 |
| 7 |
| 0 |
| Controlled Substances/​Alcohol | 1 | 1 | 1 |
| Driver Fitness | 1 | 0 | 0 |
| 0 |
| Jun 6, 2025 | IA | TRUCK TRACTOR | 1 | 0 |
| Apr 23, 2025 | IA | TRUCK TRACTOR | 1 | 0 |
| Feb 7, 2025 | IA | STRAIGHT TRUCK | 0 | 0 |
| Jan 29, 2025 | IA | TRUCK TRACTOR | 4 | 0 |
| Dec 10, 2024 | IA | TRUCK TRACTOR | 2 | 0 |
| Nov 21, 2024 | IA | TRUCK TRACTOR | 1 | 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 | 3939 | Inoperable Required Lamp | Vehicle Maintenance | — |
| Feb 26, 2026 | 3939H | Inoperable head lamps | Vehicle Maintenance | — |
| Dec 8, 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 |
| Sep 5, 2025 | 3939TS | Inoperative turn signal | Vehicle Maintenance | Yes |
| Sep 5, 2025 | 39111B4 | Medical (Certificate) - Operating a CDL (passenger or property carrying) vehicle that is non-excepted and the driver has self-certified as excepted interstate or | Driver Fitness | — |
| Sep 5, 2025 | 3922LC | Improper lane change | Unsafe Driving | — |
| Sep 5, 2025 | 3922Y | Failure to yield right of way | Unsafe Driving | — |
| Sep 5, 2025 | 39282DUMT | Driver - Using a hand-held mobile telephone | Unsafe Driving | — |
| Sep 5, 2025 | 39319 | Inoperative/Defective Hazard Warning Lamp | Vehicle Maintenance | — |