Aqueduct construction · Texas

Cornerstone Site Services

Round Rock, TX · ~86 workers · 7 years of OSHA Injury Tracking Application data.

A
Excellent Safety Record
0.7
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

Cornerstone Site Services runs at 26% of its industry's injury rate - far safer than the typical Aqueduct construction workplace, earning a grade A.

Cornerstone Site Services: 0.7 TCR = 26% of Aqueduct construction BLS 2.8 · 7y Form 300A (see methodology below)

Cornerstone Site Services safety composite

Cornerstone Site Services scores strongest on total case rate (tcr) (safer than 93% of same-industry peers) and weakest on fatalities (safer than 52%), 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).

B

78/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
A 0.74 per 100 workers

Safer than 93% of industry peers

DART rate
B 0 per 100 workers

Safer than 79% 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%).

Cornerstone Site Services held a steady TCR band

Cornerstone Site Services's TCR held near 0.0 from 0.0 in 2016 to 0.0 in 2022. Peak filing year was 2018 at 2.3 TCR. In 2022, DART was 0× this establishment's average TCR (severity share of cases).

2016=0.0 · 2017=1.1 · 2018=2.3 · 2019=1.0 · 2020=0.9 · 2021=0.0 · 2022=0.0

OSHA ITA Form 300A scorecard

Establishment book 237110 · Round Rock, TX AT/BELOW-IND · SMALL

Grade A · TCR 0.7 · 26% of ind

  • DART 0.0 DART
  • RANK #33/194
  • PHOTO Thorstad Companies
  • BOOK 7y book
  • INJ 5 inj
  • SIZE ~86 FTE

Nearest TCR peer: Thorstad Companies (0.0 TCR gap)

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

Cornerstone Site Services in the TCR neighbourhood

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

TCR

What this shows Cornerstone Site Services averages 0.7 TCR (26% of the Aqueduct construction BLS benchmark).

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

Cornerstone Site Services TCR series: 2016=0 · 2017=1.1 · 2018=2.3 · 2019=1 · 2020=0.9 · 2021=0 · 2022=0 · BLS 2.8

Where Cornerstone Site Services falls in its industry

1,614 Aqueduct construction establishments

Safer than 93% of graded establishments in this industry, whose median TCR is 3.0.

More dangerous than peersSafer than peers

Narrower to Texas alone (the establishments it most directly competes with for workers and contracts): ranked #33 safest of 194 Aqueduct construction employers in Texas.

Cornerstone Site Services (86 employees, TCR 0.7) among 29 same-industry peers, split at the industry median of 54 employees and a TCR of 3.0 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 051015 Average employees Total Case Rate Cornerstone Site Services
Cornerstone Site Services (86 employees, TCR 0.7) among 29 same-industry peers, split at the industry median of 54 employees and a TCR of 3.0

Cornerstone Site Services has more employees than the Aqueduct construction median and a lower injury rate than the industry's median TCR of 3.0. 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
2022 0.0 0.0 0 0 0
2021 0.0 0.0 0 0 0
2020 0.9 0.0 1 0 0
2019 1.0 1.0 1 0 0
2018 2.3 2.3 2 0 0
2017 1.1 1.1 1 0 0
2016 0.0 0.0 0 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

237110 · TX · Round Rock

1,614 Aqueduct construction employers nationwide with a credible TCR · 38,394 rated employers in Texas with headcount on file · 203 employers in Round Rock, TX · 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 Thorstad Companies 0.7 TCR
NAICS-TCR SLR COMMUNICATIONS 0.7 TCR
NAICS-TCR MFM Contracting Corp 0.7 TCR
NAICS-TCR Liberty Utilities Park water 0.7 TCR
STATE-SIZE Village Farms, Permian Basin 86 FTE
STATE-SIZE Cal-Maine Food, Inc.- Klesel Complex 86 FTE
STATE-SIZE Sundown Tubing Testing 86 FTE
STATE-SIZE San Antonio Division 86 FTE
CITY-NEAR US TX Round Rock Office 01 5,052 FTE
CITY-NEAR Round Rock 2 1,953 FTE
CITY-NEAR US TX Round Rock Office 07 1,735 FTE
CITY-NEAR Baylor Scott & White Medical Center - Round Rock 1,576 FTE
NAT-TCR Protech Powder Coatings Inc, DBA Chemionics 0.7 TCR
NAT-TCR M1773 Atlanta Medic 0.7 TCR
NAT-TCR L3 Fuzing & Ordnance Systems 0.7 TCR
NAT-TCR General Administrative Services - Town Hall 0.7 TCR
NAT-SIZE Weirton 86 FTE
NAT-SIZE SCR La Palma 86 FTE
NAT-SIZE Sedano's Supermarket #23 86 FTE
NAT-SIZE Homeway Homes Facility 86 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: 2022, 2021, 2020, 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.