Data / Mines / Oklahoma / Mill Creek Plant #39
Mill Creek Plant #39: 24 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Mill Creek Plant #39 is an active crushed, broken sandstone surface mine in Johnston County, Oklahoma, operated by U.S. Silica Company, LLC with 49 employees on MSHA's record (mine ID 3400836). Since January 1, 2022 MSHA inspectors issued 24 citations and orders there with $3,953 in proposed penalties, and 6 accident reports were filed there, with 5 injury or illness cases.
The request: Watch Mill Creek Plant #39 (MSHA mine ID 3400836) in Johnston County, Oklahoma: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 3400836
- Status
- Active since August 29, 1975
- Main commodity
- Crushed, broken sandstone
- Mine type
- Surface
- County
- Johnston County, Oklahoma
- Nearest town
- Mill Creek
- Operator
- U.S. Silica Company, LLC
- Parent company
- Uss Holdings Inc
- Employees
- 49
- MSHA field office
- Norman Ok Field Office
- Citations and orders since January 1, 2022
- 24
- Significant and substantial
- 3 (12.5%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $3,953
- Amount paid so far
- $3,953
- Inspections
- 12
- Inspector hours on site
- 164
- Citations per inspection
- 2.00 (all mines 2.30)
- Accident reports
- 6
- Injury and illness cases
- 5
- Fatalities
- 0
- Latest MSHA record
- August 10, 2026
- Citations issued to contractors here
- 4 ($2,141 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 | 4 | 0 | $568 | 1 |
| 2023 | 3 | 0 | $468 | 1 |
| 2024 | 4 | 0 | $588 | 1 |
| 2025 | 4 | 0 | $646 | 1 |
| 2026 | 9 | 3 | $1,683 | 1 |
Standards cited most at Mill Creek Plant #39
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 56.14112 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.6306 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12040 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.13011 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12023 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Mill Creek Plant #39
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 3 |
| No lost time, or an occupational illness | 2 |
What the accident reports at Mill Creek Plant #39 describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 4 |
| Machinery | 1 |
| Other | 1 |
Equipment named in accident reports at Mill Creek Plant #39
| Equipment | Reports |
|---|---|
| Ore haulage trucks - off highway trucks | 1 |
| Hand tools (powered) | 1 |
Other open mines in Johnston County, Oklahoma
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Mill Creek Dolomite | Mill Creek Dolomite LLC | Johnston County, OK | Crushed, broken limestone | 15 | 85 |
| Mill Creek Quarry | P&K Stone LLC | Johnston County, OK | Crushed, broken granite | 20 | 55 |
| Mill Creek Limestone Quarry | Martin Marietta Materials Southwest, LLC | Johnston County, OK | Crushed, broken limestone | 60 | 30 |
| Mill Creek Quarry | Heidelberg Materials Southwest LLC | Johnston County, OK | Dimension limestone | 5 | 17 |
| Amrize Coleman Quarry | Amrize South Central Inc. | Johnston County, OK | Crushed, broken limestone | 7 | 14 |
| North Troy | Vulcan Construction Materials, LLC | Johnston County, OK | Crushed, broken limestone | 55 | 11 |
| Mill Creek Plant #37 | U.S. Silica Company, LLC | Johnston County, OK | Sand, industrial | 23 | 8 |
| Mill Creek | Martin Marietta Materials, Inc. | Johnston County, OK | Crushed, broken granite | 43 | 5 |
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.