Commercial building construction general contractors · California

Timberwolff Construction

Upland, CA · ~48 workers · 5 years of OSHA Injury Tracking Application data.

A
Excellent Safety Record
1.4
Avg TCR
2.9
Industry avg
0
Fatalities
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The verdict

Timberwolff Construction runs at 47% of its industry's injury rate - far safer than the typical Commercial building construction general contractors workplace, earning a grade A.

Timberwolff Construction: 1.4 TCR = 47% of Commercial building construction general contractors BLS 2.9 · 5y Form 300A (see methodology below)

Timberwolff Construction safety composite

Timberwolff Construction scores strongest on total case rate (tcr) (safer than 68% of same-industry peers) and weakest on dart rate (safer than 21%), 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

47/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
C 1.37 per 100 workers

Safer than 68% of industry peers

DART rate
F 2.86 per 100 workers

Safer than 21% 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

Timberwolff Construction: 0.0 → 2.9 TCR

Peak year 2017 @ 4.0 TCR · DART/TCR 2.09× in 2021

Timberwolff Construction's TCR rose 2.9 from 0.0 in 2016 to 2.9 in 2021. Peak filing year was 2017 at 4.0 TCR. In 2021, DART was 2.09× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 236220 · Upland, CA AT/BELOW-IND · SMALL

Grade A · TCR 1.4 · 47% of ind

  • DART 2.9 DART
  • RANK #138/486
  • PHOTO The Weitz Company - …
  • BOOK 5y book
  • INJ 3 inj
  • SIZE ~48 FTE

Nearest TCR peer: The Weitz Company - Iowa Office (0.0 TCR gap)

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

Timberwolff Construction in the TCR neighbourhood

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

TCR

What this shows Timberwolff Construction averages 1.4 TCR (47% of the Commercial building construction general contractors BLS benchmark).

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

Timberwolff Construction TCR series: 2016=0 · 2017=4 · 2018=0 · 2019=0 · 2021=2.9 · BLS 2.9

Where Timberwolff Construction falls in its industry

4,692 Commercial building constructi establishments

Safer than 68% of graded establishments in this industry, whose median TCR is 2.3.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #138 safest of 486 Commercial building constructi employers in California.

Timberwolff Construction (48 employees, TCR 1.4) among 29 same-industry peers, split at the industry median of 55 employees and a TCR of 2.3 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 0100200300400500 02468 Average employees Total Case Rate Timberwolff Construction
Timberwolff Construction (48 employees, TCR 1.4) among 29 same-industry peers, split at the industry median of 55 employees and a TCR of 2.3

Timberwolff Construction has fewer employees than the Commercial building construction general median and a lower injury rate than the industry's median TCR of 2.3. 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
2021 2.9 2.9 1 0 0
2019 0.0 0.0 0 0 0
2018 0.0 0.0 0 0 0
2017 4.0 4.0 2 0 0
2016 0.0 0.0 0 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

236220 · CA · Upland

4,692 Commercial building construction general contractors employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 80 employers in Upland, 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 The Weitz Company - Iowa Office 1.4 TCR
NAICS-TCR Main office 1.4 TCR
NAICS-TCR Carl Owen Construction 1.4 TCR
NAICS-TCR K Corp Support Services 1.4 TCR
STATE-SIZE ARVIN PRODUCTION & ADMIN 48 FTE
STATE-SIZE Rava Business Park 48 FTE
STATE-SIZE Guerrero Transportation & Contracting Inc 48 FTE
STATE-SIZE VPS, Inc 48 FTE
CITY-NEAR San Antonio Regional Hospital 2,315 FTE
CITY-NEAR California Respite Care, Inc. 1,275 FTE
CITY-NEAR Ono-036 910 FTE
CITY-NEAR Ono-007 908 FTE
NAT-TCR Two Nuts and a Clam Inc. 1.4 TCR
NAT-TCR 900 Centenial Voorhees 1.4 TCR
NAT-TCR Woods Masonry 1.4 TCR
NAT-TCR 665 Concord Avenue Cambridge MA 1.4 TCR
NAT-SIZE Bickford of Suffolk 48 FTE
NAT-SIZE TASCA AUTOMOTIVE GROUP Inc Truck Center 48 FTE
NAT-SIZE NA-US-MA-Norwell-Washington Street 48 FTE
NAT-SIZE ATL Corp 48 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: 2021, 2019, 2018, 2017, 2016. 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.