Limestone mining or quarrying · California

Specialty Minerals Inc.

Lucerne Valley, CA · ~68 workers · 3 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
3.8
Avg TCR
1.9
Industry avg
0
Fatalities
Subscribe to safety-record updates (RSS)

The verdict

Specialty Minerals Inc. runs at 199% of its industry's injury rate - more dangerous than the typical Limestone mining or quarrying workplace, earning a grade D.

Specialty Minerals Inc.: 3.8 TCR = 199% of Limestone mining or quarrying BLS 1.9 · 3y Form 300A (see methodology below)

Specialty Minerals Inc. safety composite

Specialty Minerals Inc. scores strongest on total case rate (tcr) (safer than 56% of same-industry peers) and weakest on dart rate (safer than 13%), 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).

D

39/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
C 3.79 per 100 workers

Safer than 56% of industry peers

DART rate
F 6.9 per 100 workers

Safer than 13% 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%).

Rising injury rate

Specialty Minerals Inc.: 3.0 → 6.9 TCR

Peak year 2023 @ 6.9 TCR · DART/TCR 1.82× in 2023

Specialty Minerals Inc.'s TCR rose 3.9 from 3.0 in 2019 to 6.9 in 2023. In 2023, DART was 1.82× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 212311 · Lucerne Valley, CA ABOVE-IND · SMALL

Grade D · TCR 3.8 · 199% of ind

  • DART 6.9 DART
  • RANK #3/7
  • PHOTO Road Builders LLC db…
  • BOOK 3y book
  • INJ 6 inj
  • SIZE ~68 FTE

Nearest TCR peer: Road Builders LLC dba Greenville Quarries (0.2 TCR gap)

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

Specialty Minerals Inc. in the TCR neighbourhood

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

TCR

What this shows Specialty Minerals Inc. averages 3.8 TCR (199% of the Limestone mining or quarrying BLS benchmark).

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

Specialty Minerals Inc. TCR series: 2019=3 · 2022=1.5 · 2023=6.9 · BLS 1.9

Where Specialty Minerals Inc. falls in its industry

27 Limestone mining or quarrying establishments

Safer than 56% of graded establishments in this industry, whose median TCR is 4.6.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #3 safest of 7 Limestone mining or quarrying employers in California.

Specialty Minerals Inc. (68 employees, TCR 3.8) among 16 same-industry peers, split at the industry median of 48 employees and a TCR of 4.6 2×2 strategic matrix plotting 17 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 20406080100120 05101520 Average employees Total Case Rate Specialty Minerals Inc.
Specialty Minerals Inc. (68 employees, TCR 3.8) among 16 same-industry peers, split at the industry median of 48 employees and a TCR of 4.6

Specialty Minerals Inc. has more employees than the Limestone mining or quarrying median and a lower injury rate than the industry's median TCR of 4.6. 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
2023 6.9 6.9 3 0 0
2022 1.5 1.5 1 0 0
2019 3.0 0.0 2 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

212311 · CA · Lucerne Valley

27 Limestone mining or quarrying employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 5 employers in Lucerne Valley, 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 Road Builders LLC dba Greenville Quarries 3.6 TCR
NAICS-TCR Eden Stone Co. 4.5 TCR
NAICS-TCR Ondrick Portable Crushing & Paving, LLC 4.6 TCR
NAICS-TCR Redding Cement 2.7 TCR
STATE-SIZE California Valley Land Co. 68 FTE
STATE-SIZE MCFFO 68 FTE
STATE-SIZE VinePro Vineyard Management, Inc. 68 FTE
STATE-SIZE Knights Grapevine Nursery 68 FTE
CITY-NEAR Lucerne Valley Market and Hardware 67 FTE
CITY-NEAR S.S. Hert Lucerne Valley 66 FTE
CITY-NEAR S.S. Hert Trucking, Inc. 58 FTE
CITY-NEAR HI-Grade Materials-Lucerne Valley Quarry 12 FTE
NAT-TCR Insulated Panel Company 3.8 TCR
NAT-TCR Yenkin-Majestic Paint Corp. 3.8 TCR
NAT-TCR Jim's Electric Co., Inc. 3.8 TCR
NAT-TCR Doubletree by Hilton Orlando Downtown 3.8 TCR
NAT-SIZE Allegheny Bradford Corporation - LD 68 FTE
NAT-SIZE Morral Companies - Main Facility 68 FTE
NAT-SIZE Maria Gardens 68 FTE
NAT-SIZE Cardinal Health SLC PHARM 68 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.

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

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