Diemer Construction Co Llc is an active interstate carrier based in Tonkawa, OK.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 52 | 13 | 0 |
| Tractors | 0 | 39 | 0 |
| Trailers | 0 | 42 | 0 |
| Total Power Units | 52 | ||
Distinct vehicles · 24 mo
vs 52 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 67% | 92% | Around peer average |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 78% | 95% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 81% | 91% | 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 | 1 | — | 6.67% |
| Vehicle | 0 | 3 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Oct 1, 2025 | 0 | 1 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 8 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 6, 2026 | OK | TRUCK TRACTOR | 1 | 0 |
| Dec 31, 2025 | OK | TRUCK TRACTOR | 1 | 0 |
| Nov 24, 2025 | OK | TRUCK TRACTOR | 1 | 1 |
| Jul 3, 2025 | OK | TRUCK TRACTOR | 2 |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 3 | 0.76 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 5 | 7.41 | — |
| Driver Fitness | 1 | 0.40 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 2 states. Top state OK accounts for 90% of activity. Activity outside home state (OK): 10%.
| 3 |
| Unsafe Driving | 3 | 2 | 0 |
| Driver Fitness | 1 | 0 | 1 |
| Jun 19, 2025 | OK | STRAIGHT TRUCK | 3 | 1 |
| Jun 17, 2025 | TX | TRUCK TRACTOR | 1 | 0 |
| Jun 13, 2025 | OK | STRAIGHT TRUCK | 2 | 0 |
| Apr 30, 2024 | OK | STRAIGHT TRUCK | 0 | 0 |
| Apr 23, 2024 | OK | STRAIGHT TRUCK | 1 | 0 |
| Mar 29, 2024 | OK | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 6, 2026 | 39216D | Driver - Failed to use seat belt while operating a CMV | Unsafe Driving | — |
| Dec 31, 2025 | 3922SLLS2 | State/Local Laws - Speeding 6-10 miles per hour over the speed limit | Unsafe Driving | — |
| Nov 24, 2025 | 393130CCHVE | Heavy Vehicles/Equipment - Improper securement of heavy vehicles equipment or machinery with crawler tracks or wheels | Vehicle Maintenance | Yes |
| Jul 3, 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 | Yes |
| Jul 3, 2025 | 393130CCHVE | Heavy Vehicles/Equipment - Improper securement of heavy vehicles equipment or machinery with crawler tracks or wheels | Vehicle Maintenance | Yes |
| Jun 19, 2025 | 39347E | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | Vehicle Maintenance | — |
| Jun 19, 2025 | 39353BMAN | Air Brake - CMV manufactured on or after 10/20/1994 is not equipped with automatic air brake adjusters | Vehicle Maintenance | — |
| Jun 19, 2025 | 3963A1BOS | Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination | Vehicle Maintenance | Yes |
| Jun 17, 2025 | 3963A1B | Brakes (general) Explain: | Vehicle Maintenance | — |
| Jun 13, 2025 | 3939ALHLI | Lighting - Headlamp(s) - Any inoperative | Vehicle Maintenance | — |