Data / Mines / Texas / Madden Materials Knowlton Plant
Madden Materials Knowlton Plant: 57 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Madden Materials Knowlton Plant is an active crushed, broken limestone surface mine in Comal County, Texas, operated by Madden Materials with 3 employees on MSHA's record (mine ID 4105475). Since January 1, 2022 MSHA inspectors issued 57 citations and orders there with $18,292 in proposed penalties, and 2 accident reports were filed there, with 2 injury or illness cases.
The request: Watch Madden Materials Knowlton Plant (MSHA mine ID 4105475) in Comal County, Texas: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4105475
- Status
- Active since April 1, 2020
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Comal County, Texas
- Nearest town
- Bracken TX
- Operator
- Madden Materials
- Employees
- 3
- MSHA field office
- San Antonio TX Field Office
- Citations and orders since January 1, 2022
- 57
- Significant and substantial
- 5 (8.8%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $18,292
- Amount paid so far
- $18,292
- Inspections
- 17
- Inspector hours on site
- 118
- Citations per inspection
- 3.35 (all mines 2.30)
- Accident reports
- 2
- Injury and illness cases
- 2
- Fatalities
- 0
- Latest MSHA record
- November 4, 2026
- Citations issued to contractors here
- 2 ($311 proposed)
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 16 | 0 | $4,858 | 0 |
| 2023 | 17 | 3 | $5,475 | 0 |
| 2024 | 4 | 0 | $1,588 | 0 |
| 2025 | 15 | 1 | $6,371 | 0 |
| 2026 | 5 | 1 | $0 | 2 |
Standards cited most at Madden Materials Knowlton Plant
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12016 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14206 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Madden Materials Knowlton Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
What the accident reports at Madden Materials Knowlton Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 1 |
| Slip or fall of person | 1 |
Equipment named in accident reports at Madden Materials Knowlton Plant
| Equipment | Reports |
|---|---|
| Welding machine | 1 |
Other open mines in Comal County, Texas
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Balcones Plant | Cemex Construction Materials South LLC | Comal County, TX | Cement | 85 | 334 |
| Hunter Quarry | Colorado Materials Inc | Comal County, TX | Crushed, broken limestone | 116 | 136 |
| Servtex Plant | Heidelberg Materials Southwest LLC | Comal County, TX | Crushed, broken limestone | 92 | 118 |
| Hunter Cement Plant | Ash Grove Cement South Texas LLC | Comal County, TX | Cement | 133 | 117 |
| New Braunfels Plant | Martin Marietta Materials, Inc. | Comal County, TX | Lime | 83 | 83 |
| Balcones Quarry | Cemex Construction Materials South LLC | Comal County, TX | Crushed, broken limestone | 165 | 80 |
| Tejas Quarry | Anderson Columbia Company Inc | Comal County, TX | Crushed, broken limestone | 8 | 71 |
| Mobile CR #3210 | Dean Word Company | Comal County, TX | Crushed, broken limestone | 7 | 30 |
| Rox, Inc. | Rox, Inc. | Comal County, TX | Dimension stone | 7 | 26 |
| Brauntex Materials, Inc. | Brauntex Materials Inc | Comal County, TX | Crushed, broken limestone | 20 | 23 |
| Lion Cave Materials Briggs Pit | Lion Cave Materials | Comal County, TX | Crushed, broken limestone | 6 | 16 |
| Solms Operation | Capitol Aggregates, Inc. | Comal County, TX | Construction sand and gravel | 4 | 11 |
| Hunter Stone | Martin Marietta Materials Southwest, LLC | Comal County, TX | Crushed, broken stone | 25 | 8 |
| Comal Quarry | Vulcan Construction Materials, LLC | Comal County, TX | Crushed, broken limestone | 3 | 0 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.