Engineering consulting services · California

Cornerstone Development Company

Ontario, CA · ~31 workers · 2 years of OSHA Injury Tracking Application data.

C
Average Safety Record
0.0
Avg TCR
0.5
Industry avg
0
Fatalities
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The verdict

Cornerstone Development Company runs at 0% of its industry's injury rate - about level with the typical Engineering consulting services workplace, earning a grade C.

Cornerstone Development Company: 0.0 TCR = 0% of Engineering consulting services BLS 0.5 · 2y Form 300A (see methodology below)

Cornerstone Development Company safety composite

Cornerstone Development Company scores strongest on total case rate (tcr) (safer than 100% of same-industry peers) and weakest on fatalities (safer than 51%), 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).

B

77/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
A 0 per 100 workers

Safer than 100% of industry peers

DART rate
C 0 per 100 workers

Safer than 70% 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%).

Cornerstone Development Company held a steady TCR band

Cornerstone Development Company's TCR held near 0.0 from 0.0 in 2020 to 0.0 in 2022. Peak filing year was 2020 at 0.0 TCR.

2020=0.0 · 2022=0.0

OSHA ITA Form 300A scorecard

Establishment book 541330 · Ontario, CA AT/BELOW-IND · SMALL

Grade C · TCR 0.0 · 0% of ind

  • DART 0.0 DART
  • RANK #0/83
  • PHOTO Burrow Global Servic…
  • BOOK 2y book
  • INJ 0 inj
  • SIZE ~31 FTE

Nearest TCR peer: Burrow Global Services, LLC (0.0 TCR gap)

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

Cornerstone Development Company in the TCR neighbourhood

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

TCR

What this shows Cornerstone Development Company averages 0.0 TCR (0% of the Engineering consulting services BLS benchmark).

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

Cornerstone Development Company TCR series: 2020=0 · 2022=0 · BLS 0.5

Where Cornerstone Development Company falls in its industry

690 Engineering consulting service establishments

Safer than 100% of graded establishments in this industry, whose median TCR is 0.9.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #0 safest of 83 Engineering consulting service employers in California.

Cornerstone Development Company (31 employees, TCR 0.0) among 29 same-industry peers, split at the industry median of 112 employees and a TCR of 0.9 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 01,0002,0003,0004,000 051015 Average employees Total Case Rate Cornerstone Development Company
Cornerstone Development Company (31 employees, TCR 0.0) among 29 same-industry peers, split at the industry median of 112 employees and a TCR of 0.9

Cornerstone Development Company has fewer employees than the Engineering consulting services median and a lower injury rate than the industry's median TCR of 0.9. 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
2022 0.0 0.0 0 0 0
2020 0.0 0.0 0 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

541330 · CA · Ontario

690 Engineering consulting services employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 599 employers in Ontario, CA · 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 Burrow Global Services, LLC 0.0 TCR
NAICS-TCR Compass WH 0.0 TCR
NAICS-TCR WHQ Campus 0.0 TCR
NAICS-TCR Lincolnshire 0.0 TCR
STATE-SIZE GCF 31 FTE
STATE-SIZE Nielsen Farms 31 FTE
STATE-SIZE Western Star Nurseries LLC 31 FTE
STATE-SIZE Progressive Growers Inc 31 FTE
CITY-NEAR Prime Healthcare Services Inc. Location: St. Mary's, Passaic LLC 46-3499370 (HP29) 10,997 FTE
CITY-NEAR CAONA - ONTARIO HUB 4,372 FTE
CITY-NEAR ONTARIO HUB (CAONA) 3,354 FTE
CITY-NEAR Atlantic Solutions Group Inc, Inc. DBA Empire Workforce Solutions 3,240 FTE
NAT-TCR Raleigh Managed Services 0.0 TCR
NAT-TCR Airborn Inc. Addison 0.0 TCR
NAT-TCR Keller Warehouse 0.0 TCR
NAT-TCR Hampton Inn & Suites 0.0 TCR
NAT-SIZE Eugene/Springfield Administration 31 FTE
NAT-SIZE 103530 Frb Gaffney Rd 31 FTE
NAT-SIZE 6957-SCE 31 FTE
NAT-SIZE Juvenile Court Services 31 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: 2022, 2020. 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.