What is Stack Bros's safety grade?

Stack Bros has a CarrierRecord safety grade of B. This grade is based on FMCSA inspection results, out-of-service rates, and crash history. Grades range from A (excellent) to F (poor). NR means not enough data to rate.

How many FMCSA inspections does Stack Bros have?

Stack Bros has 23 inspections on record with a 34.8% vehicle out-of-service rate and a 4.3% driver out-of-service rate. The national averages are 23.2% and 6.4% respectively. These inspections revealed 48 violations.

Has Stack Bros been involved in any crashes?

Stack Bros has no crashes on record in FMCSA data.

Does Stack Bros have active authority and insurance?

Stack Bros has active common authority. BIPD insurance is not on file with the FMCSA. Cargo insurance is not on file.

Stack Bros Safety Record

DOT# 1280175 · Superior, WI 54880 · 7153982964

Legal name: Stack Bros Mechanical Contractors INC

Good safety record — scored 27/100. Below-average out-of-service rates and few crashes.

Last inspected 11/25/2025

Grade based on FMCSA inspection, crash, and violation data. See methodology →

Safety Score Breakdown · 27/100 points

Vehicle OOS Rate 20/30 pts

Driver OOS Rate 7/20 pts

Crash Rate 0/30 pts

Fatal Crash Penalty 0/20 pts

Lower scores are better. How is this calculated?

According to FMCSA records, Stack Bros (DOT# 1280175) in Superior, Wisconsin has 23 inspections on record with 48 violations and a 34.8% vehicle out-of-service rate. Safety grade: B. Active common authority.

23 Inspections

34.8% Vehicle OOS Rate

0 Crashes

134 Power Units

Out-of-Service Rates vs. National Average

An out-of-service (OOS) violation means a vehicle or driver was found unsafe to operate during a roadside inspection and was prohibited from continuing until the issue was corrected.

Vehicle OOS Rate 34.8%

Carrier: 34.8% (8 of 23) National: 23.2%

Driver OOS Rate 4.3%

Carrier: 4.3% (1 of 23) National: 6.4%

21% OOS rate better than 21% of carriers in Wisconsin

36% crash rate better than 36% of carriers in Wisconsin

Violation Categories · 48 total violations

FMCSA groups violations into Behavioral Analysis and Safety Improvement Categories (BASICs). Each violation found during a roadside inspection is classified into a category that reflects the type of safety risk.

48 total violations across 23 inspections

9 violations resulted in out-of-service orders (19%)

Vehicle Maintenance

Unsafe Driving

Hours of Service

Driver Fitness

Inspection History · 23 records

FMCSA inspections range from Level 1 (full vehicle and driver examination) to Level 6 (enhanced motorcoach inspection). Level 1 is the most thorough; Levels 2 and 3 are walk-around and driver-only checks.

Inspected across 3 states: IA, MN, WI

Level 1: 9 (39%) Level 2: 8 (35%) Level 3: 6 (26%)

2 of 5 recent inspections had vehicle out-of-service violations

Date	State	Level	Veh OOS	Drv OOS
11/25/2025	WI	1	2	0
07/22/2025	MN	3	0	1
05/12/2025	WI	1	0	0
05/06/2025	WI	1	0	0
04/15/2025	WI	2	1	0
07/16/2024	MN	3	0	0
07/08/2024	IA	2	3	0
05/23/2024	MN	2	0	0
05/10/2024	MN	3	0	0
01/31/2024	MN	2	0	0
01/30/2024	MN	3	0	0
12/28/2023	WI	1	0	0
12/11/2023	WI	1	0	0
10/06/2023	WI	2	0	0
09/07/2023	WI	2	0	0
08/29/2023	WI	2	0	0
08/18/2023	WI	1	0	0
08/16/2023	WI	3	0	0
07/29/2023	WI	3	0	0
07/25/2023	WI	1	0	0
05/23/2023	WI	1	1	0
05/16/2023	WI	1	0	0
05/16/2023	WI	2	1	0

Authority & Insurance

FMCSA operating authority permits interstate for-hire transportation. Carriers must maintain minimum insurance coverage levels to keep authority active. BIPD (bodily injury and property damage) insurance is required for all for-hire carriers.

MC/MX Number MC1583591

Common Authority Active

Contract Authority N

Broker Authority N

BIPD Insurance Not On File

Cargo Insurance Not On File

Surety Bond Not On File

Type	Insurer	Coverage	Effective
BIPD/Primary	Travelers Indemnity Company	$750	09/27/2023

Fleet Profile

Power units include trucks, tractors, and other commercial motor vehicles registered to the carrier. Driver count reflects the total number of drivers reported on the carrier's MCS-150 filing.

Power Units 134

Drivers 143

Fleet Size Large Fleet

Operation Type Interstate

Hazmat Yes

Operating Since 08/27/2004

MCS-150 Filed 20250527 1

Annual Mileage (MCS-150) 600,000

Address 3119 Hill Ave, Superior, WI 54880