STACK BROS MECHANICAL CONTRACTORS INC
AUTHORIZEDDBA: STACK BROS
USDOT
1280175
MC Number
1583591
Fleet Size
134
Total Drivers
143
FMCSA-derived snapshot updated: August 23, 2026. This is not a real-time record; verify critical authority, insurance and safety details directly with FMCSA.
Broker verification report
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Safety overview
STACK BROS MECHANICAL CONTRACTORS INC is a large interstate motor carrier based in SUPERIOR, Wisconsin, operating 134 power units with 143 drivers. CarrierOwl is currently validating BASIC percentile display against the official FMCSA SMS portal; use the inspection, out-of-service, crash, authority, and insurance data below as the primary public safety indicators on this page. Their driver out-of-service rate of 12.5% runs above the national average of 6.7%. The current imported FMCSA crash snapshot returned no matching crash rows for this carrier; this is not proof that no crash occurred. FMCSA records show 8 inspections for this carrier.
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BASIC scores
Under reviewCarrierOwl is validating BASIC percentile calculations against the official FMCSA SMS portal. Until that review is complete, use FMCSA directly for current BASIC percentiles and use the inspection, out-of-service, crash, authority, and insurance data on this page as supporting indicators.
BASIC percentile display is temporarily paused while we validate CarrierOwl's methodology against the official FMCSA SMS portal.
Out-of-service rates vs. national average
An out-of-service order means the driver or vehicle was pulled from operation during a roadside inspection.
For reference, the average driver OOS rate in Wisconsin is 8.5% and the average vehicle OOS rate is 27.7% across 64,523 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Interstate
- Operation Classification
- Authorized For Hire, Private (Property)
- Cargo Carried
- N
- Hazmat
- No
- Safety Rating Date
- N/A
Inspections
8
Total
53%
Driver %
Insurance on file
Liability (BIPD)
Travelers Indemnity Co — eff. Sep 27, 2023
Cargo
Not on file
Surety Bond
Not on file
Trust Fund
Not on file
Source: FMCSA Motus. Imported Aug 4, 2026. Verify current filings directly with FMCSA before relying on them.
Crash history
0
Total Crashes
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Frequently asked questions
Is STACK BROS MECHANICAL CONTRACTORS INC authorized to operate?
CarrierOwl's FMCSA-derived snapshot for STACK BROS MECHANICAL CONTRACTORS INC (USDOT #1280175) shows "AUTHORIZED" status. The snapshot lists them as an interstate carrier. Verify the current official record with FMCSA before booking a load.
What is STACK BROS MECHANICAL CONTRACTORS INC's safety record?
STACK BROS MECHANICAL CONTRACTORS INC has 8 inspections in CarrierOwl's current imported snapshot; the snapshot returned no matching crash rows. They do not show a formal FMCSA safety rating in CarrierOwl's current data. A zero result is limited to the dataset and snapshot window. Verify current BASIC percentiles and crash information directly with FMCSA before relying on them.
How many trucks does STACK BROS MECHANICAL CONTRACTORS INC operate?
STACK BROS MECHANICAL CONTRACTORS INC operates 134 power units with 143 drivers on file. That puts them in the large carrier category by FMCSA standards.
Does STACK BROS MECHANICAL CONTRACTORS INC transport hazardous materials?
No. STACK BROS MECHANICAL CONTRACTORS INC does not have a hazardous materials flag in the FMCSA database.
Where is STACK BROS MECHANICAL CONTRACTORS INC located?
STACK BROS MECHANICAL CONTRACTORS INC is based in SUPERIOR, Wisconsin at 3119 HILL AVE, 54880. Phone: (715) 398-2964.
What are STACK BROS MECHANICAL CONTRACTORS INC's out-of-service rates?
STACK BROS MECHANICAL CONTRACTORS INC's driver out-of-service rate is 12.5%, compared with the 6.7% reference shown by FMCSA SMS when checked August 4, 2026. Interpret the difference with inspection volume and verify the current FMCSA record. Their vehicle out-of-service rate is 42.9%, compared with the 23.4% reference shown by FMCSA SMS when checked August 4, 2026. Interpret the difference with inspection volume and verify the current FMCSA record.