Data / Mines / Texas / Rio Medina Operations
Rio Medina Operations: 13 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Rio Medina Operations is an active crushed, broken limestone surface mine in Medina County, Texas, operated by Capitol Aggregates, Inc. with 5 employees on MSHA's record (mine ID 4105278). Since January 1, 2022 MSHA inspectors issued 13 citations and orders there with $2,445 in proposed penalties, and 3 accident reports were filed there, with 2 injury or illness cases.
The request: Watch Rio Medina Operations (MSHA mine ID 4105278) 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
- 4105278
- Status
- Active since October 11, 2017
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Medina County, Texas
- Nearest town
- Rio Medina
- Operator
- Capitol Aggregates, Inc.
- Parent company
- Zachry Corporation
- Employees
- 5
- MSHA field office
- San Antonio TX Field Office
- Citations and orders since January 1, 2022
- 13
- Significant and substantial
- 1 (7.7%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $2,445
- Amount paid so far
- $2,445
- Inspections
- 13
- Inspector hours on site
- 108
- Citations per inspection
- 1.00 (all mines 2.30)
- Accident reports
- 3
- Injury and illness cases
- 2
- Fatalities
- 0
- Latest MSHA record
- May 26, 2026
- Citations issued to contractors here
- 4 ($604 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 | 5 | 0 | $665 | 0 |
| 2023 | 1 | 0 | $143 | 1 |
| 2024 | 3 | 1 | $1,033 | 1 |
| 2025 | 4 | 0 | $604 | 0 |
Standards cited most at Rio Medina Operations
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 | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14211 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4200 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Rio Medina Operations
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
| No lost time, or an occupational illness | 1 |
What the accident reports at Rio Medina Operations describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 2 |
| Fire | 1 |
Equipment named in accident reports at Rio Medina Operations
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
| Bulldozer | 1 |
Other open mines in Medina County, Texas
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Cobey Hollow Stone- Mico | Ace Aggregates, LLC | Medina County, TX | Crushed, broken limestone | 5 | 55 |
| 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 |
| 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.