Excavation contractors · California

Argonaut Constructors

Santa Rosa, CA · ~160 workers · 5 years of OSHA Injury Tracking Application data.

B
Good Safety Record
1.4
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

Argonaut Constructors runs at 51% of its industry's injury rate - safer than the typical Excavation contractors workplace, earning a grade B.

Argonaut Constructors: 1.4 TCR = 51% of Excavation contractors BLS 2.8 · 5y Form 300A (see methodology below)

Argonaut Constructors safety composite

Argonaut Constructors scores strongest on total case rate (tcr) (safer than 73% of same-industry peers) and weakest on dart rate (safer than 49%), 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

59/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
C 1.42 per 100 workers

Safer than 73% of industry peers

DART rate
D 0.75 per 100 workers

Safer than 49% of industry peers

Fatalities
D 0

Safer than 52% 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%).

TCR Δ

−3.6

2018→2024

Argonaut Constructors injury rate improved

Argonaut Constructors's TCR fell 3.6 from 4.3 in 2018 to 0.8 in 2024. Peak filing year was 2018 at 4.3 TCR. In 2024, DART was 0.53× this establishment's average TCR (severity share of cases).

2018=4.3 · 2020=0.0 · 2021=1.3 · 2023=0.8 · 2024=0.8

OSHA ITA Form 300A scorecard

Establishment book 238910 · Santa Rosa, CA AT/BELOW-IND · MID

Grade B · TCR 1.4 · 51% of ind

  • DART 0.8 DART
  • RANK #36/184
  • PHOTO Grady & Sons Excavat…
  • BOOK 5y book
  • INJ 8 inj
  • SIZE ~160 FTE

Nearest TCR peer: Grady & Sons Excavation, LLC (0.0 TCR gap)

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

Argonaut Constructors in the TCR neighbourhood

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

TCR

What this shows Argonaut Constructors averages 1.4 TCR (51% of the Excavation contractors BLS benchmark).

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

Argonaut Constructors TCR series: 2018=4.3 · 2020=0 · 2021=1.3 · 2023=0.8 · 2024=0.8 · BLS 2.8

Where Argonaut Constructors falls in its industry

1,750 Excavation contractors establishments

Safer than 73% of graded establishments in this industry, whose median TCR is 2.5.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #36 safest of 184 Excavation contractors employers in California.

Argonaut Constructors (160 employees, TCR 1.4) among 29 same-industry peers, split at the industry median of 51 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 050100150200250 0246810 Average employees Total Case Rate Argonaut Constructors
Argonaut Constructors (160 employees, TCR 1.4) among 29 same-industry peers, split at the industry median of 51 employees and a TCR of 2.5

Argonaut Constructors has more employees than the Excavation contractors median and a lower 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 0.8 0.8 1 0 0
2023 0.8 0.0 1 0 0
2021 1.3 1.3 1 0 0
2020 0.0 0.0 0 0 0
2018 4.3 0.0 5 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238910 · CA · Santa Rosa

1,750 Excavation contractors employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 344 employers in Santa Rosa, 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 Grady & Sons Excavation, LLC 1.4 TCR
NAICS-TCR Lester Contracting, Inc 1.4 TCR
NAICS-TCR Zemba Bros., Inc. 1.4 TCR
NAICS-TCR James Construction 1.4 TCR
STATE-SIZE Trimshed 160 FTE
STATE-SIZE Chalky Ridge Vineyard Management LLC 160 FTE
STATE-SIZE Madera Farm Labor, Inc 160 FTE
STATE-SIZE Farm 160 FTE
CITY-NEAR California Department of Transportation Facility 543 2,891 FTE
CITY-NEAR 2032-02121251 2,209 FTE
CITY-NEAR 2004-00001480 1,970 FTE
CITY-NEAR CA720 SANTA ROSA MEMORIAL HOSPITAL HR 1,806 FTE
NAT-TCR Heritage Nursing Center 1.4 TCR
NAT-TCR David J Marley Roofing Contractors Inc 1.4 TCR
NAT-TCR MasterBrand 1.4 TCR
NAT-TCR Fabsco Fin-Air, LLC. 1.4 TCR
NAT-SIZE Heritage Manor Stratmore 160 FTE
NAT-SIZE Twin City Foods, Inc Ellensburg Division 160 FTE
NAT-SIZE Chadwick Main/Misc 160 FTE
NAT-SIZE Al Neyer, LLC 160 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, 2021, 2020, 2018. 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.