DBA: Diamond Seven Livestock
John C Barnum is an active interstate carrier based in Doyle, CA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 2 | 0 | 0 |
| Tractors | 2 | 0 | 0 |
| Trailers | 2 | 0 | 0 |
| Total Power Units | 2 | ||
Distinct vehicles · 24 mo
vs 2 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 88% | 95% | Worse than most peers |
| HOS Compliance | 87% | 94% | Worse than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 69% | 85% | 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 | 1 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 5 | 0 | 3 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Jan 22, 2026 | CA | TRUCK TRACTOR | 0 | 0 |
| Jul 31, 2025 | CA | TRUCK TRACTOR | 0 | 0 |
| Mar 11, 2025 | CA | TRUCK TRACTOR | 1 | 0 |
| Dec 11, 2024 | NV | TRUCK TRACTOR | 2 | 0 |
| Aug 20, 2024 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 1 | 2.50 | — |
| HOS Compliance | 1 | 0.41 | — |
| Vehicle Maintenance | 4 | 1.80 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 2 states. Top state CA accounts for 91% of activity. Activity outside home state (CA): 9%.
| Hours-of-Service Compliance |
| 1 |
| 0 |
| 0 |
| Unsafe Driving | 1 | 0 | 0 |
| CA |
| TRUCK TRACTOR |
| 1 |
| 1 |
| Jul 3, 2024 | CA | STRAIGHT TRUCK | 0 | 0 |
| Apr 10, 2024 | CA | TRUCK TRACTOR | 0 | 0 |
| Apr 10, 2024 | CA | STRAIGHT TRUCK | 2 | 2 |
| Apr 8, 2024 | CA | TRUCK TRACTOR | 0 | 0 |
| Apr 8, 2024 | CA | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 11, 2025 | 3939ALSML | Lighting - Side marker lamp(s) inoperative | Vehicle Maintenance | — |
| Dec 11, 2024 | 3922SLLTCD | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign light lane marking other | Unsafe Driving | — |
| Dec 11, 2024 | 3958A1HOSP | HOS (Property) - Failing to have a record of duty status using the method prescribed | Hours-of-Service Compliance | — |
| Aug 20, 2024 | 3963A1BOS | BRAKES OUT OF SERVICE: The number of defective brakes is equal to or greater than 20 percent of the service brakes on the vehicle or combination | Vehicle Maintenance | Yes |
| Apr 10, 2024 | 39343D | No or defective automatic trailer brake | Vehicle Maintenance | Yes |
| Apr 10, 2024 | 39370D | No or improper safety chains or cables for full trailer | Vehicle Maintenance | Yes |
| Apr 3, 2024 | 39370C | Defective coupling devices for full trailer | Vehicle Maintenance | — |