Intellectual and developmental disability homes · Washington

SL Start Seattle - 10001

Mountlake Terrace, WA · ~299 workers · 2 years of OSHA Injury Tracking Application data.

C
Average Safety Record
3.7
Avg TCR
3.8
Industry avg
0
Fatalities
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The verdict

SL Start Seattle - 10001 runs at 97% of its industry's injury rate - about level with the typical Intellectual and developmental disability homes workplace, earning a grade C.

SL Start Seattle - 10001: 3.7 TCR = 97% of Intellectual and developmental disability homes BLS 3.8 · 2y Form 300A (see methodology below)

SL Start Seattle - 10001 safety composite

SL Start Seattle - 10001 scores strongest on total case rate (tcr) (safer than 69% 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

57/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
C 3.7 per 100 workers

Safer than 69% of industry peers

DART rate
D 2.3 per 100 workers

Safer than 49% 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

SL Start Seattle - 10001: 2.3 → 5.1 TCR

Peak year 2017 @ 5.1 TCR · DART/TCR 0.62× in 2017

SL Start Seattle - 10001's TCR rose 2.7 from 2.3 in 2016 to 5.1 in 2017. In 2017, DART was 0.62× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 623210 · Mountlake Terrace, WA AT/BELOW-IND · MID

Grade C · TCR 3.7 · 97% of ind

  • DART 2.3 DART
  • RANK #12/40
  • PHOTO Administration Annex
  • BOOK 2y book
  • INJ 15 inj
  • SIZE ~299 FTE

Nearest TCR peer: Administration Annex (0.0 TCR gap)

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

SL Start Seattle - 10001 in the TCR neighbourhood

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

TCR

What this shows SL Start Seattle - 10001 averages 3.7 TCR (97% of the Intellectual and developmental disability homes BLS benchmark).

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

SL Start Seattle - 10001 TCR series: 2016=2.3 · 2017=5.1 · BLS 3.8

Where SL Start Seattle - 10001 falls in its industry

2,261 Intellectual and developmental establishments

Safer than 69% of graded establishments in this industry, whose median TCR is 5.8.

More dangerous than peersSafer than peers

Narrower to Washington alone (the establishments it most directly competes with for workers and contracts): ranked #12 safest of 40 Intellectual and developmental employers in Washington.

SL Start Seattle - 10001 (299 employees, TCR 3.7) among 29 same-industry peers, split at the industry median of 65 employees and a TCR of 5.8 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 0200400600 0510152025 Average employees Total Case Rate SL Start Seattle - 10001
SL Start Seattle - 10001 (299 employees, TCR 3.7) among 29 same-industry peers, split at the industry median of 65 employees and a TCR of 5.8

SL Start Seattle - 10001 has more employees than the Intellectual and developmental disabilit median and a lower injury rate than the industry's median TCR of 5.8. 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
2017 5.1 2.3 10 1 0
2016 2.3 0.9 5 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

623210 · WA · Mountlake Terrace

2,261 Intellectual and developmental disability homes employers nationwide with a credible TCR · 10,147 rated employers in Washington with headcount on file · 21 employers in Mountlake Terrace, WA · 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 Administration Annex 3.7 TCR
NAICS-TCR 80 ERDMAN WAY 3.7 TCR
NAICS-TCR Mainsl CA - Main Office Chico 3.7 TCR
NAICS-TCR 6443-553451 3.7 TCR
STATE-SIZE Bargreen Ellingson Tacoma 300 FTE
STATE-SIZE 3757 300 FTE
STATE-SIZE 1086 - EAST VANCOUVER WA WHSE 300 FTE
STATE-SIZE TUKWILA (WAKEN) 298 FTE
CITY-NEAR North Seattle 140 FTE
CITY-NEAR 4054-ABS-0027-0026-00414 133 FTE
CITY-NEAR ABS-0027-0026-00414 FAC-00414-MOUNTLAKE TERRACE-WA 125 FTE
CITY-NEAR SL START & ASSOCIATES LLC - SEATTLE WA 102 FTE
NAT-TCR Chase Brass and Copper Company, LLC. 3.7 TCR
NAT-TCR Richmond (Varmd) 3.7 TCR
NAT-TCR Miami Gateway (Flimi) 3.7 TCR
NAT-TCR The Whittier Pavilion 3.7 TCR
NAT-SIZE Bristol (Vabri) 299 FTE
NAT-SIZE Us Inside Sales - Greenville (Scecd) 299 FTE
NAT-SIZE HOU - Airport United Airlines Offices 299 FTE
NAT-SIZE Valerus Fields Solutions, Sealy Facility 299 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: 2017, 2016. This is publicly available government data - not a legal determination of workplace conditions.
Data sourced from official public datasets. See our methodology for details.