Water supply systems · Wisconsin

Capitol Underground, Inc

Sun Prairie, WI · ~34 workers · 3 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
16.6
Avg TCR
1.2
Industry avg
0
Fatalities
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The verdict

Capitol Underground, Inc runs at 1379% of its industry's injury rate - far more dangerous than the typical Water supply systems workplace, earning a grade F.

Capitol Underground, Inc: 16.6 TCR = 1379% of Water supply systems BLS 1.2 · 3y Form 300A (see methodology below)

Capitol Underground, Inc safety composite

Capitol Underground, Inc scores strongest on fatalities (safer than 51% of same-industry peers) and weakest on total case rate (tcr) (safer than 2%), 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).

F

27/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 16.55 per 100 workers

Safer than 2% of industry peers

DART rate
D 3.25 per 100 workers

Safer than 38% 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

Capitol Underground, Inc: 14.0 → 16.3 TCR

Peak year 2022 @ 19.4 TCR · DART/TCR 0.2× in 2023

Capitol Underground, Inc's TCR rose 2.3 from 14.0 in 2021 to 16.3 in 2023. Peak filing year was 2022 at 19.4 TCR. In 2023, DART was 0.2× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 221310 · Sun Prairie, WI ABOVE-IND · SMALL

Grade F · TCR 16.6 · 1379% of ind

  • DART 3.3 DART
  • RANK #4/4
  • PHOTO City Of Sacramento-F…
  • BOOK 3y book
  • INJ 14 inj
  • SIZE ~34 FTE

Nearest TCR peer: City Of Sacramento-Field Services Division Roll-Up (140014) (0.1 TCR gap)

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

Capitol Underground, Inc in the TCR neighbourhood

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

TCR

What this shows Capitol Underground, Inc averages 16.6 TCR (1379% of the Water supply systems BLS benchmark).

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

Capitol Underground, Inc TCR series: 2021=14 · 2022=19.4 · 2023=16.3 · BLS 1.2

Where Capitol Underground, Inc falls in its industry

727 Water supply systems establishments

Safer than 2% of graded establishments in this industry, whose median TCR is 4.2.

More dangerous than peersSafer than peers

Narrower to Wisconsin alone (the establishments it most directly competes with for workers and contracts): ranked #4 safest of 4 Water supply systems employers in Wisconsin.

Capitol Underground, Inc (34 employees, TCR 16.6) among 29 same-industry peers, split at the industry median of 53 employees and a TCR of 4.2 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 0100200300 05101520 Average employees Total Case Rate Capitol Underground, Inc
Capitol Underground, Inc (34 employees, TCR 16.6) among 29 same-industry peers, split at the industry median of 53 employees and a TCR of 4.2

Capitol Underground, Inc has fewer employees than the Water supply systems median and a higher injury rate than the industry's median TCR of 4.2. 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
2023 16.3 3.3 5 0 0
2022 19.4 0.0 4 2 0
2021 14.0 2.8 5 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

221310 · WI · Sun Prairie

727 Water supply systems employers nationwide with a credible TCR · 12,834 rated employers in Wisconsin with headcount on file · 69 employers in Sun Prairie, WI · 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 City Of Sacramento-Field Services Division Roll-Up (140014) 16.5 TCR
NAICS-TCR CITY YARDS 16.4 TCR
NAICS-TCR Distribution and Business Office 16.8 TCR
NAICS-TCR Water & Sewer Department 16.3 TCR
STATE-SIZE Drumlin Dairy, LLC 34 FTE
STATE-SIZE Merrillan East Coating 34 FTE
STATE-SIZE Bayfront Steam Plant 34 FTE
STATE-SIZE Bayfront Steam Plant-5D 34 FTE
CITY-NEAR Sun Prairie Location 290 FTE
CITY-NEAR WM 1267 286 FTE
CITY-NEAR SUN PRAIRIE GENERAL OFC 278 FTE
CITY-NEAR CB Sun Prairie 275 FTE
NAT-TCR Benton County Natural Areas, Parks, and Events 16.6 TCR
NAT-TCR Sitka Sound Seafoods 16.6 TCR
NAT-TCR 161565-Chi-Morgan Park Sta 16.6 TCR
NAT-TCR The Home City Ice Company East Greenville 16.6 TCR
NAT-SIZE Owosso Graphic Arts, Inc. 34 FTE
NAT-SIZE Lake Ridge Senior Living 34 FTE
NAT-SIZE Northwest Butane Gas Co., Carrollton 34 FTE
NAT-SIZE Us Autoforce Colorado Springs 34 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: 2023, 2022, 2021. 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.