Basalt mining or quarrying · California

Lake Herman Quarry

Vallejo, CA · ~61 workers · 2 years of OSHA Injury Tracking Application data.

C
Average Safety Record
2.1
Avg TCR
1.9
Industry avg
0
Fatalities
Subscribe to safety-record updates (RSS)

The verdict

Lake Herman Quarry runs at 112% of its industry's injury rate - about level with the typical Basalt mining or quarrying workplace, earning a grade C.

Lake Herman Quarry: 2.1 TCR = 112% of Basalt mining or quarrying BLS 1.9 · 2y Form 300A (see methodology below)

Lake Herman Quarry safety composite

Lake Herman Quarry scores strongest on total case rate (tcr) (safer than 78% of same-industry peers) and weakest on dart rate (safer than 35%), 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

56/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
B 2.13 per 100 workers

Safer than 78% of industry peers

DART rate
D 2.62 per 100 workers

Safer than 35% 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

Lake Herman Quarry: 1.6 → 2.6 TCR

Peak year 2018 @ 2.6 TCR · DART/TCR 1.23× in 2018

Lake Herman Quarry's TCR rose 1.0 from 1.6 in 2017 to 2.6 in 2018. In 2018, DART was 1.23× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 212311 · Vallejo, CA ABOVE-IND · SMALL

Grade C · TCR 2.1 · 112% of ind

  • DART 2.6 DART
  • RANK #1/7
  • PHOTO Rogers Administratio…
  • BOOK 2y book
  • INJ 3 inj
  • SIZE ~61 FTE

Nearest TCR peer: Rogers Administration Inc (0.1 TCR gap)

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

Lake Herman Quarry in the TCR neighbourhood

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

TCR

What this shows Lake Herman Quarry averages 2.1 TCR (112% of the Basalt mining or quarrying BLS benchmark).

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

Lake Herman Quarry TCR series: 2017=1.6 · 2018=2.6 · BLS 1.9

Where Lake Herman Quarry falls in its industry

27 Basalt mining or quarrying establishments

Safer than 78% 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 #1 safest of 7 Basalt mining or quarrying employers in California.

Lake Herman Quarry (61 employees, TCR 2.1) among 17 same-industry peers, split at the industry median of 48 employees and a TCR of 4.6 2×2 strategic matrix plotting 18 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 Lake Herman Quarry
Lake Herman Quarry (61 employees, TCR 2.1) among 17 same-industry peers, split at the industry median of 48 employees and a TCR of 4.6

Lake Herman Quarry has more employees than the Basalt 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
2018 2.6 2.6 2 0 0
2017 1.6 0.0 1 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

212311 · CA · Vallejo

27 Basalt mining or quarrying employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 118 employers in Vallejo, 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 Rogers Administration Inc 2.2 TCR
NAICS-TCR Materials Division 2.5 TCR
NAICS-TCR Carver Sand & Gravel LLC. 1.7 TCR
NAICS-TCR MGQ, Inc. 2.6 TCR
STATE-SIZE Silveira Farms 61 FTE
STATE-SIZE La Brucherie Produce, LLC 61 FTE
STATE-SIZE Olds Ranch 61 FTE
STATE-SIZE 1750 Production Office 61 FTE
CITY-NEAR California Department of Transportation Facility 96 2,891 FTE
CITY-NEAR 2032-02121351 2,446 FTE
CITY-NEAR 02821351 VALLEJO HOSPITAL TOWER 1,635 FTE
CITY-NEAR 0206-02621351 1,632 FTE
NAT-TCR Meggitt Polymers & Composites 2.1 TCR
NAT-TCR Wistar 2.1 TCR
NAT-TCR Ridgway 2.1 TCR
NAT-TCR Shopko Hometown #706 (Doniphan, MO) 2.1 TCR
NAT-SIZE NuTec Tooling Systems, Inc. 61 FTE
NAT-SIZE CCS - Headquarters 61 FTE
NAT-SIZE Yorkville 61 FTE
NAT-SIZE Food City Store #759 61 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: 2018, 2017. 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.