Madden Materials Knowlton Plant has $21K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
2
Years on record
2026
Latest incident
Apr 2026
Compliance record
MSHA citations since 2020
69
citations
9
significant & substantial
$20,536
proposed penalties
$20,536
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2020
22
inspections on record
258
inspection hours
n/a
citations per 100 inspection hours
ⓘThis rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 258 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Madden Materials Knowlton Plant has $21K in proposed MSHA penalties and $0 outstanding across 1 contested dockets.
Penalty disposition
ⓘDifferences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$21K
proposed penalties
$21K
current assessed
$21K
paid to date
$0
outstanding
68 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2025-10-02.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
ⓘCitations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2025 Q4
2,441
2
1
819.3
2025 Q3
2,685
0
0
0.0
2025 Q2
2,412
6
0
2487.6
2025 Q1
3,384
7
0
2068.6
2024 Q4
4,496
0
0
0.0
2024 Q3
6,236
1
0
160.4
2024 Q2
5,111
0
0
0.0
2024 Q1
5,472
3
0
548.2
Show 17 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2023 Q4
5,692
11
3
1932.5
2023 Q3
5,132
8
2
1558.8
2023 Q2
4,671
0
0
0.0
2023 Q1
2,899
0
0
0.0
2022 Q4
1,937
5
0
2581.3
2022 Q3
2,210
0
0
0.0
2022 Q2
7,020
1
0
142.5
2022 Q1
7,020
10
0
1424.5
2021 Q4
7,020
0
0
0.0
2021 Q3
8,125
7
1
861.5
2021 Q2
8,125
0
0
0.0
2021 Q1
8,125
3
0
369.2
2020 Q4
2,580
0
0
0.0
2020 Q3
2,580
5
2
1938.0
2020 Q2
1,260
0
0
0.0
2020 Q1
1,260
0
0
0.0
2019 Q4
2,620
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
2 on file
2026 · 2 incidents
April 2, 2026TX · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
On 1/6 Miner reported soreness to shoulder from welding on 1/4 for an extended period of time in an awkward position inside primary screen deck. Miner was treated conservatively with ice and stretching and continued work duties. On 1/14 incident became reportable when medical evaluation prescribed physical therapy.
For insurers, brokers, and safety consultants
The full compliance file on Madden Materials Knowlton Plant
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and
docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF
with the underlying data as CSV.