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PROSOSKI TRAILER PARTS AND SERVICE LLC
DBA: Iron Bear Trailer
Denver, CO
CarrierChk vetting signal
No flags raised
Authority, insurance, safety rating, crash records and out-of-service rates checked
FMCSA status: Active registration · no operating authority · DOT 4148944
Active
No Safety Rating
Broker Vetting Summary
Key signals from current FMCSA records
Authority
No Active Authority
Common carrier
Insurance
Not Found
No coverage amount on file
Safety
Not Rated
20.0% OOS · 14 inspections on record
✓ No risk flags found on authority or insurance records
Vetting notes
- Active FMCSA registration, but no active for-hire operating authority on record
- Registered with FMCSA as a private carrier — not registered to haul other companies' freight for hire
- No active insurance filing found on record
- Driver out-of-service rate 11.1% — above the 5.5% national average
- Vehicle out-of-service rate 16.7% — below the 20.7% national average
- 14 FMCSA inspections on record
Company Information
Registration, contact and cargo details
FMCSA Registration
DOT Number
4148944
Safety Rating
Not Rated
Operation Classification
Private (property)
MCS-150 Filed
April 7, 2026
FMCSA Registration
October 25, 2023
Annual Mileage
150,000 mi (2025)
Contact Information
Address
1291 E 54th Ave, Denver, CO 80216-1771
Phone
Email
Owner / Officer
Jessica Prososki
Officer 2
Brad Prososki
Cargo Types
General FreightOther Cargo
Safety Snapshot
Out-of-service rates, violations and crashes
Safety & Inspection Summary
Total Inspections
14
Driver Inspections
12
Vehicle Inspections
9
Out-of-Service Violations
4
Violations by Category
Vehicle Maintenance9
Unsafe Driving1
Hours of Service4
OOS Rates vs. National Average
Driver OOS Rate11.1% · national avg 5.5%
⚠ Above national average (5.6pp higher)
Vehicle OOS Rate16.7% · national avg 20.7%
✓ Below national average
20.0% of 10 inspections in the last 24 months put a driver or vehicle out of service —
48th percentile among carriers with 10–24 inspections (lower is better).
CarrierChk calculation from FMCSA roadside inspection records, not an FMCSA score.
Inspection Trend by Year
2026
2025
2024
Violation Rate by Category
Share of roadside inspections in FMCSA's rolling 24-month window that found a violation in each category. The individual violations are listed under each inspection in Inspection Details below. None of this is the basis of the safety rating, which comes from an on-site compliance review.
Vehicle Maintenance
3 of 7 inspections
Unsafe Driving
1 of 11 inspections
Hours of Service
2 of 11 inspections
Driver Fitness
1 of 11 inspections
Controlled Substances
0 of 11 inspections
Crash History (1)
Crashes reported to FMCSA in the last 24 months. A crash appearing here is a reported event, not a finding of fault.
1
Crashes
0
Fatalities
0
Injuries
1
Tow-aways
| Date | State | Fatal | Injured | Tow | Conditions |
|---|---|---|---|---|---|
| May 8, 2026 | CO | — | — | Yes | No Adverse Conditions · Daylight · Dry |
Fleet & Operating Areas
Observed roadside activity and equipment
Where This Carrier Operates
States where this carrier's roadside inspections were recorded
FewerMore
CO4
WY4
NE3
KS2
Fleet & Equipment (6)
Vehicles identified in this carrier's inspection history. Year, make, model and equipment type are decoded from the VIN.
Power units
~6
of 5 reported to FMCSA
Trailers
—
seen at inspection
Equipment types observed
Truck
3
Not Applicable
2
Chassis / Incomplete
1
Units on record
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| 2019 Freightliner M2 | Truck · Class 6 | 3ALACWFC2KDKG6095 | 4 | 1 |
| 2020 Kenworth T3 Series | Truck · Class 6 | 2NKHHM6X8LM399124 | 3 | 2 |
| 2006 Ford F-650 | Chassis / Incomplete · Class 6 | 3FRNF65N56V364364 | 2 | — |
| 2014 Ford F-550 | Not Applicable · Class 5 | 1FDUF5HY5EEA87021 | 1 | — |
| 2018 Freightliner M2 | Not Applicable · Class 7 | 3ALACXFC6JDJY6307 | 1 | — |
| 2014 Isuzu NQR/NRR | Truck · Class 5 | JALE5W162E7901056 | 1 | — |
A vehicle appearing here was recorded in an inspection — it is not proof the carrier still operates it today.
Inspection Details
Each roadside inspection with its violations
Inspection Records (14)
| Date | Report # | Location | Level | Viol | OOS | Shipper | Unit Type | Make | VIN | License |
|---|---|---|---|---|---|---|---|---|---|---|
| September 24, 2026 | T354001308 | BROADWATER NE | I | — | — | SELF | Straight Truck |
FREIGHTLINER |
3ALACXFC6JDJY6307 |
CO TEMP |
| August 20, 2026 | T321000091 | ALLIANCE NE | III | — | — | IRON BEAR TRAILER | Straight Truck |
FREIGHTLINER |
3ALACWFC2KDKG6095 |
CO EZU99 |
| August 12, 2026 | PMLW000639 | WY, WY | I | 1 | — | PROSOSKI | Straight Truck |
FORD |
1FDUF5HY5EEA87021 |
CO CNMK35 |
| 393.95A4-EEUS | Emergency Equipment - Fire Extinguishers - unsecured | Emergency Equipment | ||||||||
| July 30, 2026 | T354001273 | BROADWATER NE | III | — | — | IRON BEAR TRAILER | Straight Truck |
FREIGHTLINER |
3ALACWFC2KDKG6095 |
CO ECZU99 |
| July 23, 2026 | 1749370765 | DUMONT CO | I | — | — | IRON BEAR TRAILER | Straight Truck |
KENWORTH |
2NKHHM6X8LM399124 |
CO FCPW92 |
| May 7, 2026 | 1569210855 | FORT MORGAN CO | II | 2 | — | IRON BEAR TRAILER | Straight Truck |
FREIGHTLINER |
3ALACWFC2KDKG6095 |
CO ECZU99 |
| 392.2-SLLED | State/Local Laws - Excessive dimension (width/height/length) | |||||||||
| 393.11A1-LIL | Lighting - Identification lamp(s) missing | Clearance Identification Lamps/Other | ||||||||
| April 3, 2026 | 0305000008 | GOODLAND KS | III | 1 | 1 | SAME AS CARRIER | Straight Truck |
KENWORTH |
2NKHHM6X8LM399124 |
CO FCPW92 |
| 395.8A1-HOSP | OOSHOS (Property) - Failing to have a record of duty status using the method prescribed | Incomplete/Wrong Log | ||||||||
| October 17, 2025 | HP03053570 | SHERMAN COUNTY - 181, KS | I | 3 | 1 | SAME AS CARRIER | Straight Truck |
KENWORTH |
2NKHHM6X8LM399124 |
CO FCPW92 |
| 393.100B-C | OOSCargo - Cargo not secured to prevent leaking/spilling/blowing/falling from CMV | Improper Load Securement | ||||||||
| 395.8K2-HOSRC | 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 | ||||||||
| 395.8C-HOSF | HOS (Form) - Record of duty status form failed to include city/state/village/location for every change of duty status in each 24 hour period. Date: | |||||||||
| June 4, 2025 | 0266650310 | LIVERMORE CO | II | 1 | — | IRON BEAR TRAILER | Straight Truck |
ISUZU |
JALE5W162E7901056 |
CO CRQA87 |
| 392.16-D | Driver - Failed to use seat belt while operating a CMV | Seat Belt | ||||||||
| March 31, 2025 | TJDP000354 | GLENROCK EXIT 165, WY | I | — | — | IRON BEAR | Straight Truck |
FREIGHTLINER |
3ALACWFC2KDKG6095 |
CO ECZU99 |
Shippers Seen at Inspections
Shipper names recorded by roadside inspectors over roughly the last three years. Only inspected loads appear, so this is a sample of who the carrier hauls for, not a complete customer list. Names are as entered at the roadside; blanks and placeholders such as “N/A” or “same as carrier” are left out.
| Shipper | Inspections | Most recent |
|---|---|---|
| JERRY'S WELDING | 1 | April 1, 2024 |
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Data sourced from FMCSA MCMIS via Socrata. Record last updated: October 19, 2026.
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