Distribution of natural gas · Michigan

Alta Gas SEMCO Energy INC

Port Huron, MI · ~420 workers · 6 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
1.5
Avg TCR
1.2
Industry avg
0
Fatalities
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The verdict

Alta Gas SEMCO Energy INC runs at 124% of its industry's injury rate - more dangerous than the typical Distribution of natural gas workplace, earning a grade D.

Alta Gas SEMCO Energy INC: 1.5 TCR = 124% of Distribution of natural gas BLS 1.2 · 6y Form 300A (see methodology below)

Alta Gas SEMCO Energy INC safety composite

Alta Gas SEMCO Energy INC scores strongest on total case rate (tcr) (safer than 73% of same-industry peers) and weakest on fatalities (safer than 50%), 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).

C

60/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
C 1.49 per 100 workers

Safer than 73% of industry peers

DART rate
D 0.74 per 100 workers

Safer than 53% of industry peers

Fatalities
D 0

Safer than 50% 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%).

Alta Gas SEMCO Energy INC held a steady TCR band

Alta Gas SEMCO Energy INC's TCR held near 0.2 from 1.2 in 2019 to 1.0 in 2024. Peak filing year was 2021 at 2.2 TCR. In 2024, DART was 0.5× this establishment's average TCR (severity share of cases).

2019=1.2 · 2020=1.4 · 2021=2.2 · 2022=1.4 · 2023=1.6 · 2024=1.0

OSHA ITA Form 300A scorecard

Establishment book 221210 · Port Huron, MI ABOVE-IND · MID

Grade D · TCR 1.5 · 124% of ind

  • DART 0.7 DART
  • RANK #14/32
  • PHOTO Redlands - Bld: 0687…
  • BOOK 6y book
  • INJ 37 inj
  • SIZE ~420 FTE

Nearest TCR peer: Redlands - Bld: 0687 - 15 (0.0 TCR gap)

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

Alta Gas SEMCO Energy INC in the TCR neighbourhood

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

TCR

What this shows Alta Gas SEMCO Energy INC averages 1.5 TCR (124% of the Distribution of natural gas BLS benchmark).

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

Alta Gas SEMCO Energy INC TCR series: 2019=1.2 · 2020=1.4 · 2021=2.2 · 2022=1.4 · 2023=1.6 · 2024=1 · BLS 1.2

Where Alta Gas SEMCO Energy INC falls in its industry

1,153 Distribution of natural gas establishments

Safer than 73% of graded establishments in this industry, whose median TCR is 2.6.

More dangerous than peersSafer than peers

Narrower to Michigan alone (the establishments it most directly competes with for workers and contracts): ranked #14 safest of 32 Distribution of natural gas employers in Michigan.

Alta Gas SEMCO Energy INC (420 employees, TCR 1.5) among 29 same-industry peers, split at the industry median of 56 employees and a TCR of 2.6 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 0200400600800 05101520 Average employees Total Case Rate Alta Gas SEMCO Energy INC
Alta Gas SEMCO Energy INC (420 employees, TCR 1.5) among 29 same-industry peers, split at the industry median of 56 employees and a TCR of 2.6

Alta Gas SEMCO Energy INC has more employees than the Distribution of natural gas median and a lower injury rate than the industry's median TCR of 2.6. 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
2024 1.0 0.7 4 0 0
2023 1.6 1.4 7 0 0
2022 1.4 0.9 6 0 0
2021 2.2 1.0 9 0 0
2020 1.4 0.5 6 0 0
2019 1.2 0.7 5 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

221210 · MI · Port Huron

1,153 Distribution of natural gas employers nationwide with a credible TCR · 16,393 rated employers in Michigan with headcount on file · 87 employers in Port Huron, 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 Redlands - Bld: 0687 - 15 1.5 TCR
NAICS-TCR Elizabethtown Gas-Green Lane 1.5 TCR
NAICS-TCR Cascade Natural Gas Company Bend Distict Office-Operations-Field 1.5 TCR
NAICS-TCR Laurel Office EN3Q 1.5 TCR
STATE-SIZE Knape & Vogt Oak Manufacturing 420 FTE
STATE-SIZE L.E. Jones Company 420 FTE
STATE-SIZE Twelve Oaks 302 420 FTE
STATE-SIZE Battle Creek WKKI Pilot Plant and Corporate Office 420 FTE
CITY-NEAR MCLAREN PORT HURON 1,384 FTE
CITY-NEAR McLaren Port Huron Hospital 1,333 FTE
CITY-NEAR County of St. Clair 861 FTE
CITY-NEAR Lake Huron Medical Center 688 FTE
NAT-TCR Chalet Living & Rehab 1.5 TCR
NAT-TCR American Intern Col 1.5 TCR
NAT-TCR Es-Columbia Ozaukee 1.5 TCR
NAT-TCR MRC - Cornerstone 1.5 TCR
NAT-SIZE 101 AZ Dairy 420 FTE
NAT-SIZE Dayton Progress Corperation 420 FTE
NAT-SIZE Hutchinson Plant 420 FTE
NAT-SIZE Grannis Plant 420 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: 2024, 2023, 2022, 2021, 2020, 2019. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.