Carrierintel
SB

STACK BROS MECHANICAL CONTRACTORS INC

Carrierintel Safety Score: 71/100. 11 inspection violations in 12 months. Last inspected Oct 2026.

DOT 1280175MC 1583591No active authorityActiveInterstateTravelers Indemnity CoSUPERIOR, WI

COMPANY

Authority since
—
MCS-150
2026-10-15 · 37,215 mi (2025)
Fleet
134 units · 35 trailers · 143 drivers
Annual mileage (VMT)
600,000 mi (2022)

ADDRESS

Physical
3119 HILL AVE
SUPERIOR, WI 54880
Mailing
Same as physical

CONTACT

Phone
7153982964
Email
bill@stackbr.com

OFFICERS

Primary Officer
WILLIAM E STACK
Title
PRESIDENT

OPERATION & CARGO

Operation classification
Private Property · Authorized For Hire
Specialty
Construction & Building Materials
Cargo types
3
Building MaterialsMachinery, Large ObjectsConstruction
Self-reported by the company on its latest MCS-150 filing (FMCSA census). Reflects what the carrier is authorized and equipped to haul, not actual recent loads. Specialty is our summary of the declared cargo mix.
AUTHORITY
36 mo
Active authority
INSURANCE
1 active
Travelers Indemnity Co
RISK GRADE
Elevated Risk
2 risk factors · 3 strengths
OOS RATE
19.2%
5 / 26 inspections

Carrierintel Safety Score

Rolling 12-month heuristic based on inspections, OOS, violations, crashes & fatalities. Not the official FMCSA SMS score.

71
out of 100
Good
Markers: OOS inspection Crash Fatality

Fleet vs Reality

last 12 months · power-unit VINs from roadside inspections
Declared (MCS-150)
134 power units
Unique power units seen
5
+ 3 trailer VINs
Inspections
7
Discrepancy
0.0x

Elevated Risk

2 risk factors · 3 strengths · 5 data points

SAFETY PERFORMANCE

Crash Record
1 crashes · 0 fatal · 0 with injuries · 1 tow-away
Clean Inspection Rate
81% — 21 clean of 26 inspections
Out-of-Service Rate
19.2% — driver OOS 1 insp., vehicle OOS 4 insp.

COMPLIANCE & AUTHORITY

USDOT Registration
Status: Active
Operating Authority
No active authority · 2026-10-27 · MC1583591
Out-of-service orders
None on record
Authority Events
3 historical event(s) on file
MCS-150 Filing
Last filed 2026-10-15

INSURANCE

Active Coverage
1 policy(ies) on file · total max coverage $750,000

SUMMARY

Severe OOS rate 36% (last 24 mo)
2.3 violations per inspection
No crashes in the last 24 months
81% clean inspections
Active insurance on file

INDUSTRY REPORTS

  • ELD Tampering — Carriers cited for ELD tampering under 49 CFR § 395.8(e), by carrier and state.
  • Top Violations — The ten most-cited FMCSA violation codes of the last 30 days.
  • Phantom Fleets — Declared power units against the vehicles seen at roadside inspections.
  • English Proficiency — Carriers whose drivers were cited under 49 CFR § 391.11(b)(2), by carrier and state.
  • Methodology — Where the data comes from and how the Safety Score and Risk Grade are built.

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