Addition, alteration and renovation for-sale builders, commercial and institutional building · Maryland

Therrien Waddell

Gaithersburg, MD · ~29 workers · 4 years of OSHA Injury Tracking Application data.

A
Excellent Safety Record
0.9
Avg TCR
2.9
Industry avg
0
Fatalities
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The verdict

Therrien Waddell runs at 30% of its industry's injury rate - far safer than the typical Addition, alteration and renovation for-sale builders, commercial and institutional building workplace, earning a grade A.

Therrien Waddell: 0.9 TCR = 30% of Addition, alteration and renovation for-sale builders, commercial and institutional building BLS 2.9 · 4y Form 300A (see methodology below)

Therrien Waddell safety composite

Therrien Waddell scores strongest on total case rate (tcr) (safer than 81% 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).

C

71/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
B 0.87 per 100 workers

Safer than 81% of industry peers

DART rate
C 0 per 100 workers

Safer than 73% 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%).

Therrien Waddell held a steady TCR band

Therrien Waddell's TCR held near 0.0 from 0.0 in 2018 to 0.0 in 2021. Peak filing year was 2020 at 3.5 TCR. In 2021, DART was 0× this establishment's average TCR (severity share of cases).

2018=0.0 · 2019=0.0 · 2020=3.5 · 2021=0.0

OSHA ITA Form 300A scorecard

Establishment book 236220 · Gaithersburg, MD AT/BELOW-IND · SMALL

Grade A · TCR 0.9 · 30% of ind

  • DART 0.0 DART
  • RANK #28/99
  • PHOTO PENN Acoustics, Inc.
  • BOOK 4y book
  • INJ 1 inj
  • SIZE ~29 FTE

Nearest TCR peer: PENN Acoustics, Inc. (0.0 TCR gap)

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

Therrien Waddell in the TCR neighbourhood

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

TCR

What this shows Therrien Waddell averages 0.9 TCR (30% of the Addition, alteration and renovation for-sale builders, commercial and institutional building BLS benchmark).

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

Therrien Waddell TCR series: 2018=0 · 2019=0 · 2020=3.5 · 2021=0 · BLS 2.9

Where Therrien Waddell falls in its industry

4,692 Addition, alteration and renov establishments

Safer than 81% of graded establishments in this industry, whose median TCR is 2.3.

More dangerous than peersSafer than peers

Narrower to Maryland alone (the establishments it most directly competes with for workers and contracts): ranked #28 safest of 99 Addition, alteration and renov employers in Maryland.

Therrien Waddell (29 employees, TCR 0.9) 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 Therrien Waddell
Therrien Waddell (29 employees, TCR 0.9) among 29 same-industry peers, split at the industry median of 55 employees and a TCR of 2.3

Therrien Waddell has fewer employees than the Addition, alteration and renovation for- 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 0.0 0.0 0 0 0
2020 3.5 3.5 1 0 0
2019 0.0 0.0 0 0 0
2018 0.0 0.0 0 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

236220 · MD · Gaithersburg

4,692 Addition, alteration and renovation for-sale builders, commercial and institutional building employers nationwide with a credible TCR · 7,213 rated employers in Maryland with headcount on file · 202 employers in Gaithersburg, MD · 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 PENN Acoustics, Inc. 0.9 TCR
NAICS-TCR TCCo-CT 0.9 TCR
NAICS-TCR Russell Group 0.9 TCR
NAICS-TCR The Boldt Company - Stevens Point, WI 0.9 TCR
STATE-SIZE Fort Smallwood 29 FTE
STATE-SIZE Frederick Division 29 FTE
STATE-SIZE WGL MD - Rockville 29 FTE
STATE-SIZE IPS - Integrated Project Services, LLC - Germantown 29 FTE
CITY-NEAR AstraZeneca Gaithersburg Campus 4,117 FTE
CITY-NEAR MDGAI - GAITHERSBURG HUB 794 FTE
CITY-NEAR Adventist Healthcare Support Center to SGMC 764 FTE
CITY-NEAR MDGAI - GAITHERSBURG-PACKAGE CENTER 759 FTE
NAT-TCR UMA, Geotechnical Construction, Inc. 0.9 TCR
NAT-TCR North America Flooring Sales 0.9 TCR
NAT-TCR Delta 0.9 TCR
NAT-TCR Redhorse Corporation 0.9 TCR
NAT-SIZE Kuzzins Bowden Hospitality II, LLC 29 FTE
NAT-SIZE Medical Laundry of the Tri Cities 29 FTE
NAT-SIZE Polartec LLC - Hudson NH Facility 29 FTE
NAT-SIZE S07506 - WMHS Phoenix 29 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, 2020, 2019, 2018. This is publicly available government data - not a legal determination of workplace conditions.
Data sourced from official public datasets. See our methodology for details.