What is MC number 1583591?

MC number 1583591 is assigned to Stack Bros Mechanical Contractors Inc, a registered motor carrier with the FMCSA under USDOT number 1280175.

Is Stack Bros Mechanical Contractors Inc Safe? DOT 1280175 – Safety Rating, Crashes & Violations

This carrier is active with no crashes on record.

Stack Bros Mechanical Contractors Inc is a registered motor carrier with the FMCSA under USDOT number 1280175. The company operates from Superior, WI and maintains an active operating status with 134 power units and 143 drivers on record.

Safety Rating

FMCSA Safety Rating

— Not Rated

No formal safety rating has been assigned to Stack Bros Mechanical Contractors Inc by the FMCSA. View official FMCSA record →

Inspection Summary

All-time Inspections

All-time

Total

OOS

Driver OOS

Vehicle OOS

9 inspections — relatively low volume, which may indicate a smaller or newer carrier.

OOS Rate77.78%

The out-of-service (OOS) rate represents the percentage of inspections that resulted in the carrier being placed out of service. 77.8% — above the national vehicle OOS average of ~21%. Review BASICS scores below.

Crash History

✅No crashes reported (FMCSA data)

BASICS Safety Scores

BASICS Scores

Higher = more risk · FMCSA Behavior Analysis and Safety Improvement Categories

0.2

Unsafe Driving

Measures violations related to speeding, reckless driving, and improper lane changes.

0.3

HOS Compliance

Tracks hours-of-service violations, including driving beyond legal limits without rest.

0.5

Driver Fitness

Reflects issues with driver qualifications, licenses, and medical certifications.

0.0

Controlled Substances

Captures drug and alcohol violations, including failed or refused tests.

12.6

Vehicle Maintenance

Reflects brake, tire, lighting, and other equipment-related inspection violations.

Scores above 65 (general freight) or 50 (passenger/hazmat) trigger an FMCSA Alert. Higher scores indicate more safety risk. National median is approximately 20–30 for active carriers.

Other Carriers in Superior, WI

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Carrier Insight

Stack Bros Mechanical Contractors Inc is a large motor carrier operating in Wisconsin. With 9 total inspections on record, the carrier has an out-of-service rate of 77.8%, which exceeds the national average of approximately 21%. No crashes have been reported in FMCSA records, which is a positive indicator for shippers and brokers evaluating this carrier.

Stack Bros Mechanical Contractors Inc has not received a formal safety rating from the FMCSA. This is common for smaller or newer carriers and does not necessarily indicate a safety problem.

The company operates 134 power units and employs 143 drivers. This fleet size places it among the larger carriers in the FMCSA registry.

Frequently Asked Questions

What is USDOT Number 1280175?

USDOT number 1280175 is assigned to Stack Bros Mechanical Contractors Inc, an active motor carrier registered with the FMCSA, based in Superior, WI.

How many inspections has Stack Bros Mechanical Contractors Inc had?

Stack Bros Mechanical Contractors Inc has recorded 9 total inspections with 7 out-of-service orders, representing an OOS rate of 77.78%.

Where is Stack Bros Mechanical Contractors Inc located?

Stack Bros Mechanical Contractors Inc is headquartered at 3119 Hill Ave, Superior, WI 54880.

What does "Not Rated" mean?

"Not Rated" means the FMCSA has not conducted a formal compliance review for this carrier. It does not indicate a safety problem — many active carriers operate without a formal rating.

Is zero crashes always a good sign?

Generally yes, but context matters. A carrier with zero crashes and very few inspections may simply have limited road exposure. Always review crash data alongside inspection volume and fleet size.

What is a normal OOS rate?

The national average vehicle out-of-service rate is approximately 21%. Driver OOS averages around 5%. Rates significantly above these thresholds may indicate recurring compliance issues.

How often is FMCSA data updated?

FMCSA publishes updated carrier data monthly. This page reflects the most recent available snapshot, updated on the date shown above.

What is the MC number for Stack Bros Mechanical Contractors Inc?

The MC number for Stack Bros Mechanical Contractors Inc is MC# 1583591. The MC number is issued by the FMCSA and authorizes carriers to operate in interstate commerce.

Data sourced from the FMCSA Open Data Portal. Updated monthly. DOT# 1280175 · Last updated: 2026-03-09. View official FMCSA record →

Stack Bros Mechanical Contractors Inc (DOT# 1280175 · MC# 1583591) – FMCSA Carrier Profile