Electric contracting · Arizona

Cornerstone Electrical Contractors, LLC

Tucson, Az, AZ · ~23 workers · 3 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
6.6
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

Cornerstone Electrical Contractors, LLC runs at 237% of its industry's injury rate - far more dangerous than the typical Electric contracting workplace, earning a grade F.

Cornerstone Electrical Contractors, LLC: 6.6 TCR = 237% of Electric contracting BLS 2.8 · 3y Form 300A (see methodology below)

Cornerstone Electrical Contractors, LLC safety composite

Cornerstone Electrical Contractors, LLC scores strongest on fatalities (safer than 51% of same-industry peers) and weakest on dart rate (safer than 1%), 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

18/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 6.63 per 100 workers

Safer than 13% of industry peers

DART rate
F 15.32 per 100 workers

Safer than 1% 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

Cornerstone Electrical Contractors, LLC: 0.0 → 15.3 TCR

Peak year 2024 @ 15.3 TCR · DART/TCR 2.31× in 2024

Cornerstone Electrical Contractors, LLC's TCR rose 15.3 from 0.0 in 2022 to 15.3 in 2024. In 2024, DART was 2.31× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 238210 · Tucson, Az, AZ ABOVE-IND · SMALL

Grade F · TCR 6.6 · 237% of ind

  • DART 15.3 DART
  • RANK #97/105
  • PHOTO 3893_7473
  • BOOK 3y book
  • INJ 2 inj
  • SIZE ~23 FTE

Nearest TCR peer: 3893_7473 (0.0 TCR gap)

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

Cornerstone Electrical Contractors, LLC in the TCR neighbourhood

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

TCR

What this shows Cornerstone Electrical Contractors, LLC averages 6.6 TCR (237% of the Electric contracting BLS benchmark).

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

Cornerstone Electrical Contractors, LLC TCR series: 2022=0 · 2023=4.6 · 2024=15.3 · BLS 2.8

Where Cornerstone Electrical Contractors, LLC falls in its industry

4,550 Electric contracting establishments

Safer than 13% of graded establishments in this industry, whose median TCR is 2.5.

More dangerous than peersSafer than peers

Narrower to Arizona alone (the establishments it most directly competes with for workers and contracts): ranked #97 safest of 105 Electric contracting employers in Arizona.

Cornerstone Electrical Contractors, LLC (23 employees, TCR 6.6) among 29 same-industry peers, split at the industry median of 63 employees and a TCR of 2.5 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 05001,0001,500 051015 Average employees Total Case Rate Cornerstone Electrical Contractors, LLC
Cornerstone Electrical Contractors, LLC (23 employees, TCR 6.6) among 29 same-industry peers, split at the industry median of 63 employees and a TCR of 2.5

Cornerstone Electrical Contractors, LLC has fewer employees than the Electric contracting median and a higher injury rate than the industry's median TCR of 2.5. 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 15.3 15.3 1 0 0
2023 4.6 0.0 1 0 0
2022 0.0 0.0 0 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238210 · AZ · Tucson, Az

4,550 Electric contracting employers nationwide with a credible TCR · 9,594 rated employers in Arizona with headcount on file · 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 3893_7473 6.6 TCR
NAICS-TCR LA Nevada, Inc. dba G & G Systems 6.6 TCR
NAICS-TCR FSE 99 Church St 6.6 TCR
NAICS-TCR Wellington Power Corporation 6.6 TCR
STATE-SIZE Nakase Brothers Wholesale Nursery AZ 23 FTE
STATE-SIZE Eloy Farm 23 FTE
STATE-SIZE McClintock Dairy, LLP - MDL266 23 FTE
STATE-SIZE Coolidge 23 FTE
NAT-TCR Sweetwater Country Club 6.6 TCR
NAT-TCR 2568 - Henderson Green Valley Ranch Pkwy 6.6 TCR
NAT-TCR Pennsylvania Grain Processing LLC 6.6 TCR
NAT-TCR Jefferson School District 14J 6.6 TCR
NAT-SIZE Willham Roofing Co. Inc. 23 FTE
NAT-SIZE Linde Gas & Equpment Inc - Lenexa 23 FTE
NAT-SIZE Regal Rexnord Filament 23 FTE
NAT-SIZE Bobcat of Atlanta - Huntsville 23 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. 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.