HaulerCheck · https://haulercheck.com/carrier/1280175-stack-bros-mechanical-contractors-inc/ · Checked 2026-10-19 21:46 UTC · Census and inspections Oct 19, 2026 · Authority and insurance: FMCSA Motus · Oct 19, 2026
STACK BROS MECHANICAL CONTRACTORS INC
Doing business as STACK BROS
Review before booking · 2 signals
How risk signals workFacts from the FMCSA record that call for a closer look. They are not a finding of wrongdoing.
- Liability insurance below the required minimum$750,000 on file; $1,000,000 required.
- Vehicle out-of-service rate well above the state average33.3% vs Wisconsin average 19.9%.
No cargo cover filed with FMCSA
Green means the FMCSA record shows it. It does not confirm who you are talking to, or that a policy covers your specific load.
What to verify next
- Confirm authority and insurance on the official Motus record ↗. Safety record: SAFER ↗.
- Call back on the number on file, (715) 398-2964, not a number from an email or load board.
- Check that the MC number you were given is MC1583591.
- 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) | MC1583591 | Primary | Travelers Indemnity Co Policy 3L209924 · BMC-91X | $750,000 | Sep 27, 2023 | Active |
Source: FMCSA Motus · Oct 19, 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.
Confirm current filings: Motus record ↗ and ask the insurer for a certificate naming you as holder.
Roadside inspections Oct 19, 2024 – Oct 19, 2026
3 of 9 · Wisconsin avg 19.9%
1 of 10 · Wisconsin avg 2.8%
10 most recent inspections
| Date | State | Level | Violations | Out of service |
|---|---|---|---|---|
| Oct 1, 2026 | WI | 2 | 1 | No |
| Sep 17, 2026 | WI | 1 | 0 | No |
| May 20, 2026 | WI | 1 | 0 | No |
| May 12, 2026 | WI | 1 | 8 | Yes |
| Apr 21, 2026 | WI | 1 | 1 | No |
| Nov 25, 2025 | WI | 1 | 5 | Yes |
| Jul 22, 2025 | MN | 3 | 2 | Yes |
| May 12, 2025 | WI | 1 | 3 | No |
| May 6, 2025 | WI | 1 | 1 | No |
| Apr 15, 2025 | WI | 2 | 3 | Yes |
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 Wisconsin average covers 42,218 vehicle and 76,980 driver inspections of all Wisconsin-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
20 violations counted in FMCSA's Safety Measurement System (SMS), 6 of them serious enough to put the driver or vehicle out of service.
Why is this different from the 24 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 | Wisconsin share |
|---|---|---|---|---|
| Vehicle Maintenance | 17 | 5 | 85.0% | 63.4% |
| Unsafe Driving | 2 | 0 | 10.0% | 21.2% |
| Driver Fitness | 1 | 1 | 5.0% | 3.1% |
10 most frequent violations
| Violation | Times | Out of service |
|---|---|---|
| Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS Tires · Vehicle Maintenance · code 39375A3TAOL | 2 | 2 |
| Air Brake - Hose/tubing damaged or not secured Brakes All Others · Vehicle Maintenance · code 39345B2BAIR | 2 | 0 |
| Lubrication - Oil or grease leak Other Vehicle Defect · Vehicle Maintenance · code 3965BL | 2 | 0 |
| 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 |
| Cargo - Vehicle components or dunnage not secured General Securement · Vehicle Maintenance · code 3929A2C | 1 | 1 |
| Lighting - Turn signal - Any inoperative on the rearmost vehicle. Lighting · Vehicle Maintenance · code 3939ALTSI | 1 | 1 |
| Driver - Failed to use seat belt while operating a CMV Seat Belt · Unsafe Driving · code 39216D | 1 | 0 |
| State/Local Laws - Speeding 11-14 miles per hour over the speed limit Speeding 3 · Unsafe Driving · code 3922SLLS3 | 1 | 0 |
| Brake - Inadequate braking system Brakes All Others · Vehicle Maintenance · code 39340AB | 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 Wisconsin column is the mix across all Wisconsin-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
No reportable crashes in this period.
Company details FMCSA census · Oct 19, 2026
| USDOT number | 1280175 |
|---|---|
| MC / docket | MC1583591 |
| Legal name | STACK BROS MECHANICAL CONTRACTORS INC |
| DBA name | STACK BROS |
| Operation | Interstate |
| Business type | — |
| Power units | 134 |
| Drivers | 143 |
| Annual mileage | 37,215 (2025) |
| Hazmat | Yes |
| Safety rating | Not rated (no compliance review on record) |
| USDOT number added | Aug 27, 2004 · 22 years ago |
| Last MCS-150 update | Oct 15, 2026 |
Cargo carried
Building MaterialsMachinery, Large ObjectsConstruction
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 STACK BROS MECHANICAL CONTRACTORS INC
What does STACK BROS MECHANICAL CONTRACTORS INC's operating authority allow?
MC1583591: Motor carrier (may haul regulated property for hire).
Which information about STACK BROS MECHANICAL CONTRACTORS INC is old or missing?
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 STACK BROS MECHANICAL CONTRACTORS INC?
Confirm the authority and insurance on the Motus record for USDOT 1280175. Call the company back on the phone number on file, (715) 398-2964, not a number from an email or load board message. Check that the MC number the dispatcher gave you matches MC1583591, and ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Other trucking companies in Superior, WI →
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 2026-10-19 21:46 UTC.