Knowles Trucking LLC
USDOT 1246064 · MC-667980 · Woodward, Oklahoma · Interstate for-hire carrier · 100–249 power units
Knowles Trucking LLC (dba Knowles Enterprises) is a company based in Woodward, Oklahoma, registered with the FMCSA as an interstate carrier (authorized for hire). It reports 143 power units and 160 drivers, which ranks it #28 by fleet size among 120 active for-hire carriers with 50+ power units headquartered in Oklahoma. In the 24 months to Sep 24, 2026 its trucks were inspected 221 times – about 1.5 inspections per power unit. 41.7% of vehicle inspections and 1.4% of driver inspections ended with an out-of-service order, against 18.8% and 2.6% for carriers of the same size nationally. FMCSA records 9 reportable crashes in the last 24 months (6 injuries, 1 fatality, 8 tow-away), or 6.3 per 100 power units versus 4.5 for its size band. Crash counts in FMCSA data do not indicate fault. Its registered cargo types are general freight, building materials, machinery, large objects, liquids / gases, oilfield equipment, garbage / refuse, commodities dry bulk, construction.
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Registration and contact
| Legal name | Knowles Trucking LLC |
|---|---|
| DBA name | Knowles Enterprises |
| USDOT number | 1246064 |
| Operating authority (docket) | MC-667980 |
| Entity type | Authorized for Hire |
| Operation | Interstate |
| Business type | — |
| Physical address | 22154 US Hwy 270, Woodward, OK 73801 |
| Phone | (970) 434-1912 |
| First registered | May 10, 2004 |
| Last MCS-150 update | Dec 3, 2025 |
| Hazmat carrier | Yes |
Check live authority, insurance and out-of-service status: FMCSA SAFER snapshot for USDOT 1246064.
Fleet and drivers
| Equipment | Owned | Term-leased | Trip-leased |
|---|---|---|---|
| Straight trucks | 53 | 0 | 0 |
| Truck tractors | 71 | 0 | 0 |
| Trailers | 80 | 0 | 0 |
- 1.12 drivers per power unit (national median for 50+ unit fleets: 0.99).
- 1.1 trailers per tractor.
- 14,355,792 miles reported for 2023 – about 100,390 miles per power unit vs a 41,613 median for 100–249-unit fleets.
- 100% of listed equipment is owned rather than leased.
- 160 CDL drivers; 6 drivers operate interstate beyond 100 miles, 0 within 100 miles.
Safety record
Roadside inspections Sep 25, 2024 – Sep 24, 2026; crashes Nov 1, 2024 – Oct 31, 2026. Benchmarks: 100–249-unit for-hire carriers nationally (2,611) and Oklahoma carriers with 50+ units (120).
| Measure | Knowles Trucking LLC | Same size, US | OK average | |
|---|---|---|---|---|
| Vehicle out-of-service rate | 41.7% | 18.8% | 16.2% | 121% higher than average |
| Driver out-of-service rate | 1.4% | 2.6% | 1.2% | 48% lower than average |
| Crashes per 100 power units | 6.3 | 4.5 | 5.4 | 40% higher than average |
| Inspections | 221 | 221 with a driver check, 216 with a vehicle check, 596 BASIC violations recorded, 102 hazmat-related | ||
| FMCSA safety rating | Conditional (rated Mar 26, 2024) | |||
Cargo carried
Less common in this directory: oilfield equipment (522 of 5,000 carriers); garbage / refuse (557 of 5,000 carriers).
Similar carriers in Oklahoma
Closest fleet size and cargo mix among Oklahoma carriers in this directory.
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| C-P Integrated Services Inc USDOT 832103 | Oklahoma City | 110 | 60 | 29 | 33.3% | 7 |
| Drisco LLC USDOT 1123267 | Ponca City | 123 | 95 | 183 | 17.5% | 20 |
| Heartland Energy Solutions LLC USDOT 3313518 | El Reno | 143 | 105 | 55 | 44.1% | 2 |
| Canyon Oilfield Services LLC USDOT 1003336 | Elk City | 119 | 71 | 56 | 19.4% | 8 |
| JRT Trucking Inc USDOT 1460996 | Sallisaw | 146 | 146 | 241 | 23.1% | 12 |
| A & a Tank Truck Company USDOT 362492 | Norman | 205 | 150 | 90 | 47.5% | 7 |
Other carriers near Woodward
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Northwest Crane Service LLC USDOT 999029 | Woodward | 88 | 85 | 29 | 17.6% | 0 |
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FAQ
What is the USDOT number of Knowles Trucking LLC?
Knowles Trucking LLC is registered with USDOT number 1246064 and operating authority MC-667980.
How many trucks does Knowles Trucking LLC have?
It reports 143 power units (71 tractors, 53 straight trucks) and 80 trailers, with 160 drivers, on its last MCS-150 update (Dec 3, 2025).
Where is Knowles Trucking LLC located?
Its registered physical address is in Woodward, Oklahoma 73801.
What is the out-of-service rate of Knowles Trucking LLC?
Over 24 months, 41.7% of vehicle inspections and 1.4% of driver inspections resulted in an out-of-service order (same-size national average: 18.8% vehicle, 2.6% driver).
Source: FMCSA Company Census File, SMS inspection file and Crash File (data.transportation.gov), refreshed 2026-11-04. Figures are as reported to FMCSA and may lag. How we calculate these numbers. Spotted an error? Carriers update their record with FMCSA via the MCS-150 form; see corrections.