HaulerCheck · https://haulercheck.com/carrier/641361-diemer-construction-company-llc/ · Checked 2026-10-20 02:20 UTC · Census and inspections Oct 19, 2026 · Authority and insurance: Last known · FMCSA snapshot May 14, 2026
DIEMER CONSTRUCTION COMPANY LLC
Doing business as DIEMER CONSTRUCTION CO INC
Review before booking · 1 signal
How risk signals workFacts from the FMCSA record that call for a closer look. They are not a finding of wrongdoing. Authority and insurance are last known from May 14, 2026.
- Vehicle out-of-service rate well above the state average66.7% vs Oklahoma average 20.8%.
No cargo cover filed with FMCSA
Not a live check. FMCSA has not published a Motus record for this carrier, so authority and insurance show the last known status from May 14, 2026. Confirm on Motus ↗ before booking.
What to verify next
- Confirm authority and insurance on the official Motus record ↗: our copy is the last known status from May 14, 2026. Safety record: SAFER ↗.
- Call back on the number on file, (580) 628-3052, not a number from an email or load board.
- Check that the MC number you were given is MC459420.
- Ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Insurance on file
Liability (BI&PD) pays for injury and damage to other people and property; it does not cover the freight. Cargo insurance covers the freight. FMCSA only requires cargo filings from household goods carriers and freight forwarders, so most carriers file none: ask for a cargo certificate that fits your load. No cargo cover filed with FMCSA.
| Type | Docket | Layer | Insurer | Coverage | Effective | Status |
|---|---|---|---|---|---|---|
| Liability (BI&PD) | MC459420 | Primary | BITCO GENERAL INSURANCE CORPORATION Policy CAP 3679781 · 91X | $750,000 | Mar 28, 2019 | Active |
Source: Last known · FMCSA snapshot May 14, 2026. Identical filings repeated in the FMCSA data are shown once; a filing listed under two dockets is one policy, not extra coverage. Coverage is the maximum amount filed with FMCSA, not the full policy.
Last known filings. Insurance for this carrier comes from the FMCSA snapshot of May 14, 2026. Policies may have been cancelled or replaced since. Confirm current filings: Motus record ↗ and ask the insurer for a certificate naming you as holder.
Roadside inspections Oct 19, 2024 – Oct 19, 2026
4 of 6 · Oklahoma avg 20.8%
1 of 8 · Oklahoma avg 4.1%
8 most recent inspections
| Date | State | Level | Violations | Out of service |
|---|---|---|---|---|
| Jun 15, 2026 | OK | 2 | 3 | Yes |
| Mar 6, 2026 | OK | 3 | 1 | No |
| Dec 31, 2025 | OK | 3 | 1 | No |
| Nov 24, 2025 | OK | 2 | 2 | Yes |
| Jul 3, 2025 | OK | 2 | 2 | Yes |
| Jun 19, 2025 | OK | 1 | 4 | Yes |
| Jun 17, 2025 | TX | 2 | 1 | No |
| Jun 13, 2025 | OK | 2 | 3 | No |
How these rates are calculated
Period: Oct 19, 2024 – Oct 19, 2026. Vehicle rate = vehicle inspections with a vehicle out-of-service order ÷ vehicle inspections (levels 1, 2, 5 and 6). Driver rate uses levels 1, 2, 3 and 6. The Oklahoma average covers 27,931 vehicle and 43,864 driver inspections of all Oklahoma-based carriers in this period. It mixes every type of operation, so compare with care; rates based on a handful of inspections say little. FMCSA's own SMS measures are weighted differently: SMS profile ↗ · SAFER snapshot ↗
Violations in FMCSA's SMS last 24 months
14 violations counted in FMCSA's Safety Measurement System (SMS), 5 of them serious enough to put the driver or vehicle out of service.
Why is this different from the 17 violations above?
The inspections section's number counts every violation written on the inspection reports in our Oct 19, 2024 – Oct 19, 2026 window. The SMS count comes from FMCSA's own monthly SMS snapshot, which uses its own 24-month window and only the violations it scores. Both are FMCSA figures; they measure different things.
| Category (FMCSA BASIC) | Violations | Out of service | Share | Oklahoma share |
|---|---|---|---|---|
| Vehicle Maintenance | 10 | 4 | 71.4% | 73.5% |
| Unsafe Driving | 2 | 0 | 14.3% | 10.9% |
| Driver Fitness | 1 | 1 | 7.1% | 3.6% |
| Hours-of-Service Compliance | 1 | 0 | 7.1% | 10.3% |
10 most frequent violations
| Violation | Times | Out of service |
|---|---|---|
| Heavy Vehicles/Equipment - Improper securement of heavy vehicles equipment or machinery with crawler tracks or wheels Improper Load Securement · Vehicle Maintenance · code 393130CCHVE | 2 | 2 |
| Medical (Certificate) - Operating a CDL (passenger or property carrying) vehicle that is non-excepted and the driver has self-certified as excepted interstate or Physical · Driver Fitness · code 39111B4 | 1 | 1 |
| Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination Brake Out Of Service · Vehicle Maintenance · code 3963A1BOS | 1 | 1 |
| Lighting - Stop lamps - Both inoperative when required to be on Lighting · Vehicle Maintenance · code 3939ALSLIWR | 1 | 1 |
| HOS (Manner) - Driver failed to retain a copy of each record of duty status for the previous 7 consecutive days which shall be in his/her possession and available Incomplete/Wrong Log · Hours-of-Service Compliance · code 3958K2HOSRC | 1 | 0 |
| Driver - Failed to use seat belt while operating a CMV Seat Belt · Unsafe Driving · code 39216D | 1 | 0 |
| State/Local Laws - Speeding 6-10 miles per hour over the speed limit Speeding 2 · Unsafe Driving · code 3922SLLS2 | 1 | 0 |
| Air Brake - CMV manufactured on or after 10/20/1994 is not equipped with automatic air brake adjusters Brakes All Others · Vehicle Maintenance · code 39353BMAN | 1 | 0 |
| Brakes (general) Explain: Brakes All Others · Vehicle Maintenance · code 3963A1B | 1 | 0 |
| Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt Brakes Out of Adjustment · Vehicle Maintenance · code 39347E | 1 | 0 |
Source: FMCSA SMS violation file, inspections in the last 24 months, published Oct 19, 2026. "Share" is this company's mix of violations; the Oklahoma column is the mix across all Oklahoma-based carriers, so you can see which kinds of problems stand out. A high count partly reflects fleet size and how often trucks are inspected.
Crashes Oct 19, 2024 – Oct 19, 2026
Crash details
| Date | Location | Fatalities | Injuries |
|---|---|---|---|
| Oct 3, 2025 | Tonkawa, OK | 0 | 1 |
Reportable crashes do not imply the carrier was at fault.
Company details FMCSA census · Oct 19, 2026
| USDOT number | 641361 |
|---|---|
| MC / docket | MC459420 |
| Legal name | DIEMER CONSTRUCTION COMPANY LLC |
| DBA name | DIEMER CONSTRUCTION CO INC |
| Operation | Interstate |
| Business type | Corporation |
| Power units | 52 |
| Drivers | 25 |
| Annual mileage | 450,936 (2025) |
| Hazmat | No |
| Safety rating | Not rated (no compliance review on record) |
| USDOT number added | May 16, 1996 · 30 years ago |
| Last MCS-150 update | Jan 27, 2026 |
Cargo carried
Motor VehiclesBuilding MaterialsMachinery, Large ObjectsLiquids/GasesOilfield EquipmentGrain, Feed, HayCommodities Dry BulkAgricultural/Farm SuppliesConstructionOtherDeleterious Substances
Change history
No changes to name, contact details, authority or insurance since we started tracking on Oct 18, 2026. We compare every company's FMCSA record each day.
to see it on your watchlist when something changes.
Questions about DIEMER CONSTRUCTION COMPANY LLC
What does DIEMER CONSTRUCTION COMPANY LLC's operating authority allow?
MC459420: Common carrier (may haul regulated property for hire for the general public).
Which information about DIEMER CONSTRUCTION COMPANY LLC is old or missing?
Operating authority is the last known status from the FMCSA snapshot of May 14, 2026, not a current check. Insurance filings are from the same May 14, 2026 snapshot. FMCSA has not issued a safety rating, which means no compliance review is on record, not that the carrier is unsafe.
What should I verify before booking DIEMER CONSTRUCTION COMPANY LLC?
Confirm the authority and insurance on the Motus record for USDOT 641361. Call the company back on the phone number on file, (580) 628-3052, not a number from an email or load board message. Check that the MC number the dispatcher gave you matches MC459420, and ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Other trucking companies in Tonkawa, OK →
Company details from the FMCSA Company Census File (Oct 19, 2026). Inspections and crashes from FMCSA MCMIS files. About our data · Report an error on this page (how corrections work).
Page generated 2026-10-20 02:20 UTC.