Plumbing and heating contractors · Michigan

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC.

Traverse City, MI · ~108 workers · 3 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
11.4
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. runs at 409% of its industry's injury rate - far more dangerous than the typical Plumbing and heating contractors workplace, earning a grade F.

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC.: 11.4 TCR = 409% of Plumbing and heating contractors BLS 2.8 · 3y Form 300A (see methodology below)

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. safety composite

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. scores strongest on fatalities (safer than 51% of same-industry peers) and weakest on total case rate (tcr) (safer than 7%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

F

30/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 11.44 per 100 workers

Safer than 7% of industry peers

DART rate
D 1.92 per 100 workers

Safer than 40% of industry peers

Fatalities
D 0

Safer than 51% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

Rising injury rate

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC.: 8.8 → 11.5 TCR

Peak year 2022 @ 14.1 TCR · DART/TCR 0.17× in 2023

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC.'s TCR rose 2.8 from 8.8 in 2019 to 11.5 in 2023. Peak filing year was 2022 at 14.1 TCR. In 2023, DART was 0.17× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 238220 · Traverse City, MI ABOVE-IND · MID

Grade F · TCR 11.4 · 409% of ind

  • DART 1.9 DART
  • RANK #140/153
  • PHOTO Sturm Heating & Air …
  • BOOK 3y book
  • INJ 31 inj
  • SIZE ~108 FTE

Nearest TCR peer: Sturm Heating & Air Conditioning (0.0 TCR gap)

Read with this employer → · Industry book → · Michigan employers → · Look up another →

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. averages 11.4 TCR (409% of the Plumbing and heating contractors BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. TCR series: 2019=8.8 · 2022=14.1 · 2023=11.5 · BLS 2.8

Where GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. falls in its industry

5,793 Plumbing and heating contracto establishments

Safer than 7% of graded establishments in this industry, whose median TCR is 3.3.

More dangerous than peersSafer than peers

Narrower to Michigan alone (the establishments it most directly competes with for workers and contracts): ranked #140 safest of 153 Plumbing and heating contracto employers in Michigan.

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. (108 employees, TCR 11.4) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3 2×2 strategic matrix plotting 30 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 050100150200250 05101520 Average employees Total Case Rate GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC.
GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. (108 employees, TCR 11.4) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

GREAT LAKES MECHANICAL SYSTEMS, INC. dba D&W MECHANICAL, INC. has more employees than the Plumbing and heating contractors median and a higher injury rate than the industry's median TCR of 3.3. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year TCR DART Injuries Illnesses Fatalities
2023 11.5 1.9 12 0 0
2022 14.1 2.2 12 1 0
2019 8.8 0.0 7 1 0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · MI · Traverse City

5,793 Plumbing and heating contractors employers nationwide with a credible TCR · 16,393 rated employers in Michigan with headcount on file · 197 employers in Traverse City, MI · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR Sturm Heating & Air Conditioning 11.4 TCR
NAICS-TCR Louisville 11.4 TCR
NAICS-TCR Pacific Rim Plumbing 11.4 TCR
NAICS-TCR Pumpman - SoCal 11.4 TCR
STATE-SIZE Groveland SC 108 FTE
STATE-SIZE Vredevoogd Heating & Cooling LLC 108 FTE
STATE-SIZE Eagle Excavation 108 FTE
STATE-SIZE White Pigeon Division 108 FTE
CITY-NEAR Munson Medical Center 3,845 FTE
CITY-NEAR Munson Healthcare 830 FTE
CITY-NEAR Northwestern Michigan College 705 FTE
CITY-NEAR Northwestern Michigan College - 28999 569 FTE
NAT-TCR Coney Island Site 1824 Houses (Oceangate) 11.4 TCR
NAT-TCR Interstate Group L.L.C. Conway Plant 11.4 TCR
NAT-TCR Toby Wells Family YMCA 11.4 TCR
NAT-TCR 10375 Fremont (WO) 11.4 TCR
NAT-SIZE Advance Services, Inc. RC 108 FTE
NAT-SIZE Techmer PM CA 108 FTE
NAT-SIZE US Environmental Inc 108 FTE
NAT-SIZE Ellen Lighting & Hardware 108 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2023, 2022, 2019. This is publicly available government data - not a legal determination of workplace conditions.
Data sourced from official public datasets. See our methodology for details.