Data / Mines / Texas / Cobey Hollow Stone- Mico
Cobey Hollow Stone- Mico: 55 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Cobey Hollow Stone- Mico is an active crushed, broken limestone surface mine in Medina County, Texas, operated by Ace Aggregates, LLC with 5 employees on MSHA's record (mine ID 4105287). Since January 1, 2022 MSHA inspectors issued 55 citations and orders there with $39,034 in proposed penalties, and 5 accident reports were filed there, with 5 injury or illness cases.
The request: Watch Cobey Hollow Stone- Mico (MSHA mine ID 4105287) in Medina County, Texas: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4105287
- Status
- Active since October 2, 2017
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Medina County, Texas
- Nearest town
- Mico
- Operator
- Ace Aggregates, LLC
- Parent company
- Construction Partners Inc
- Employees
- 5
- MSHA field office
- San Antonio TX Field Office
- Citations and orders since January 1, 2022
- 55
- Significant and substantial
- 14 (25.5%)
- Closure orders
- 2
- High negligence or reckless
- 11
- Proposed penalties
- $39,034
- Amount paid so far
- $39,034
- Inspections
- 18
- Inspector hours on site
- 130
- Citations per inspection
- 3.06 (all mines 2.30)
- Accident reports
- 5
- Injury and illness cases
- 5
- Fatalities
- 0
- Latest MSHA record
- July 1, 2026
- Citations issued to contractors here
- 5 ($749 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 | 15 | 5 | $3,779 | 1 |
| 2023 | 3 | 2 | $6,710 | 1 |
| 2024 | 32 | 5 | $20,154 | 1 |
| 2025 | 3 | 2 | $7,775 | 1 |
| 2026 | 2 | 0 | $616 | 1 |
Standards cited most at Cobey Hollow Stone- Mico
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 56.14100 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12001 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.3131 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 2 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Cobey Hollow Stone- Mico
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
| No lost time, or an occupational illness | 3 |
What the accident reports at Cobey Hollow Stone- Mico describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 2 |
| Handling of materials | 1 |
| Handtools (nonpowered) | 1 |
| Disorders (physical agents) | 1 |
Equipment named in accident reports at Cobey Hollow Stone- Mico
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
| Hand tools (not powered) | 1 |
| Shovel | 1 |
| Hand tools (powered) | 1 |
Other open mines in Medina County, Texas
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| FM 1283 | H.L. Zumwalt Quarry Operations | Medina County, TX | Crushed, broken limestone | 10 | 39 |
| Hondo Plant | NM Energy LLC | Medina County, TX | Dimension limestone | 11 | 24 |
| 711 Quarry | Medina Aggregates, LLC | Medina County, TX | Crushed, broken limestone | 2 | 21 |
| Medina Rock & Rail | Martin Marietta Materials Southwest, LLC | Medina County, TX | Crushed, broken limestone | 48 | 17 |
| Rio Medina | Martin Marietta Materials Southwest, LLC | Medina County, TX | Crushed, broken limestone | 21 | 16 |
| Rio Medina Operations | Capitol Aggregates, Inc. | Medina County, TX | Crushed, broken limestone | 5 | 13 |
| Mico Quarry | Vulcan Construction Materials, LLC | Medina County, TX | Crushed, broken stone | 16 | 12 |
| Medina Quarry | Vulcan Construction Materials, LLC | Medina County, TX | Crushed, broken limestone | 12 | 9 |
| 341 Pit | Cuatro T Construction | Medina County, TX | Crushed, broken limestone | 5 | 0 |
| Jarco Aggregates Castroville Pit | Madden Materials | Medina County, TX | Construction sand and gravel | 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.