Updated Oct 21, 2026

Knowles Trucking LLC

As of Oct 21, 2026, Knowles Trucking LLC in Woodward, Oklahoma reports 143 power units and 160 drivers on its MCS-150, FMCSA safety rating: conditional.

22154 US Hwy 270, Woodward, Oklahoma 73801 (970) 434-1912

Verified Oct 21, 2026 against FMCSA Company Census File (data.transportation.gov)

Knowles Trucking LLC (USDOT 1246064, MC-667980), doing business as Knowles Enterprises, is an active motor carrier based in Woodward, Oklahoma that FMCSA's census classifies as for-hire and that declares hazardous materials on its MCS-150. Operation: interstate. Operating authority: active for-hire authority (MC). Fleet: 143 power units and 160 drivers (160 with CDLs). Power units count straight trucks as well as tractors, so they can exceed the tractor count. It reported 14,355,792 miles for 2023 on its MCS-150. Cargo classes declared: liquids / gases, oilfield equipment, garbage / refuse, dry bulk commodities, general freight, building materials, construction, machinery, large objects, other cargo (other: Water, Crude Oil). FMCSA safety rating: conditional, from a compliance review on March 26, 2024. Registration (MCS-150) last updated December 3, 2025.

Key facts

Fleet size	100–499 power units Power units, banded. source
FMCSA safety rating	Conditional Satisfactory, Conditional or Unsatisfactory after an FMCSA compliance review; most carriers have never had one and are not rated. source
Rating age	Rated within the last 5 years How old the FMCSA safety rating is. A rating reflects one compliance review on that date, not current performance; old ratings say little about the carrier today. source
Registration update overdue	No The MCS-150 was last updated more than two years ago, past FMCSA's two-year update requirement; fleet, driver and cargo figures may be out of date. source
Operation	Interstate Interstate, intrastate hazmat or intrastate non-hazmat, as declared on the MCS-150. source
Cargo classes (MCS-150)	Liquids / gases, Oilfield equipment, Garbage / refuse, Dry bulk commodities, General freight, Building materials, Construction, Machinery, large objects, Other cargo Cargo the carrier declared it hauls on its latest MCS-150 (FMCSA's fixed cargo list). source
Driver count	100–499 drivers Total drivers, banded. source
Last MCS-150 update	Dec 3, 2025 When the carrier last updated its registration (required at least every two years). source
Doing business as	Knowles Enterprises source
USDOT number	1246064 source
MC docket	MC-667980 source
Operating authority	Active for-hire authority (MC) source
Other cargo (as described)	Water, Crude Oil source
Power units	143 source
Tractors (owned or leased)	71 source
Trailers (owned or leased)	80 source
Drivers	160 source
CDL drivers	160 source
Miles reported (MCS-150)	14,355,792 miles source
Mileage year	2023 source
Also hauls its own freight	No source
Safety rating date	Mar 26, 2024 source
USDOT registered since	May 10, 2004 source

Source event history

Source dates and first observation are different. A notice is not confirmation that a suspension took effect.

Dec 3, 2025: Filed an MCS-150 update Official source
Mar 26, 2024: Rated by FMCSA Official source
May 10, 2004: Registered with FMCSA Official source

Dates on this record

Source updated	Oct 21, 2026 (FMCSA census rows last updated (portal metadata) (the whole dataset, not this record))
Collected	Oct 21, 2026, 1:26 PM ET (the last successful check of the source that included this record)
Effective	Filed an MCS-150 update: Dec 3, 2025; Rated by FMCSA: Mar 26, 2024; Registered with FMCSA: May 10, 2004 (when the source says each fact took effect)
Retired	Not retired: the source is still maintained (whether the dataset is still maintained)

In Oklahoma

171 hazmat carriers in the dataset are in Oklahoma; 17 have profiles on this site. Hazmat carriers in Oklahoma

FMCSA safety rating (all 171 here): Conditional 8 (5%) · Unsatisfactory 1 (<1%) · Not rated 100 (58%) · Satisfactory 62 (36%)

Rating age (all 171 here): Rating over 10 years old 52 (30%) · Rated within the last 5 years 11 (6%) · Rating 5–10 years old 8 (5%) · None on record 100 (58%)

Fleet size (all 171 in this group): 10–24 power units (86) · 25–99 power units (65) · 100–499 power units (13) · 500+ power units (7)

Cargo classes (MCS-150) (all 171 in this group; a record can count under several values): General freight (101) · Liquids / gases (93) · Other cargo (91) · Machinery, large objects (84) · Building materials (82) · Construction (82) · 24 other values (560)

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Chosen by the values they share with this one, rarer values counting more; ties go to the same city, then the nearest ZIP code, then this site's order (largest fleets first (power units on the latest MCS-150)).

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Browse related lists

USDOT number: The registration number every interstate (and many intrastate) commercial carrier holds.

MCS-150: The registration form carriers file with FMCSA and must update at least every two years; fleet, drivers, cargo and the hazmat flag on this site come from it, as the carrier declared them.

Safety rating: FMCSA's result after an on-site compliance review: Satisfactory, Conditional or Unsatisfactory. A rating is not refreshed unless FMCSA reviews the carrier again, so many are years old; each profile gives the review date. Most carriers have never been reviewed and are not rated; that is not a bad mark.

Power units: Trucks and tractors that pull or carry freight.

Cargo classes: Self-declared on the MCS-150 from FMCSA's fixed list. Some carriers tick most of the list, so a long list means 'declared', not 'specialises in'; the hazmat flag does not say which hazardous materials.

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Something wrong or out of date? Suggest a correction. Source record ID 1246064.