Data / Mines / Texas / Knippa Quarry
Knippa Quarry, Uvalde County, Texas: 5 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Knippa Quarry is an active crushed, broken traprock surface mine in Uvalde County, Texas, operated by Vulcan Construction Materials, LLC with 17 employees on MSHA's record (mine ID 4100075). Since January 1, 2022 MSHA inspectors issued 5 citations and orders there with $707 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Knippa Quarry (MSHA mine ID 4100075) in Uvalde County, Texas: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4100075
- Status
- Active since July 4, 1976
- Main commodity
- Crushed, broken traprock
- Mine type
- Surface
- County
- Uvalde County, Texas
- Nearest town
- Knippa
- Operator
- Vulcan Construction Materials, LLC
- Parent company
- Vulcan Materials Company
- Employees
- 17
- MSHA field office
- San Antonio TX Field Office
- Citations and orders since January 1, 2022
- 5
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $707
- Amount paid so far
- $707
- Inspections
- 10
- Inspector hours on site
- 104
- Citations per inspection
- 0.50 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- April 23, 2026
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 | 2 | 0 | $266 | 0 |
| 2023 | 1 | 0 | $143 | 0 |
| 2024 | 1 | 0 | $147 | 0 |
| 2025 | 1 | 0 | $151 | 0 |
Standards cited most at Knippa Quarry
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 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 47.44 | Hazard communication | 1 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 1 |
Other open mines in Uvalde County, Texas
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Chapman Pit | South Texas Aggregates Inc | Uvalde County, TX | Crushed, broken limestone | 3 | 90 |
| Davenport Ranch Cline Quarry | Colorado Materials Inc | Uvalde County, TX | Crushed, broken limestone | 8 | 47 |
| Knippa Plant | Uvalde Concrete LLC | Uvalde County, TX | Construction sand and gravel | 8 | 25 |
| RCQ | RCQ, LLC | Uvalde County, TX | Crushed, broken limestone | 4 | 24 |
| Leona Rock Quarry | 8-Mile Ranch Inc | Uvalde County, TX | Crushed, broken limestone | 3 | 14 |
| Black Spur Quarry | Martin Marietta Materials Southwest, LLC | Uvalde County, TX | Crushed, broken limestone | 9 | 12 |
| Uvalde Quarry Company | Wright Materials | Uvalde County, TX | Crushed, broken limestone | 7 | 3 |
| Cantrell Quarry | Vulcan Construction Materials, LLC | Uvalde County, TX | Crushed, broken traprock | 3 | 3 |
| Uvalde Quarry | Vulcan Construction Materials, LLC | Uvalde County, TX | Crushed, broken limestone | 50 | 1 |
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.