Data / Mines / California / Glass Mountain Pumice
Glass Mountain Pumice: 7 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Glass Mountain Pumice is an active pumice surface mine in Modoc County, California, operated by Monarch Mountain Minerals & Aggregates, LLC with 7 employees on MSHA's record (mine ID 0404165). Since January 1, 2022 MSHA inspectors issued 7 citations and orders there with $2,548 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Glass Mountain Pumice (MSHA mine ID 0404165) in Modoc County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0404165
- Status
- Active since October 17, 2011
- Main commodity
- Pumice
- Mine type
- Surface
- County
- Modoc County, California
- Nearest town
- Glass Mountain
- Operator
- Monarch Mountain Minerals & Aggregates, LLC
- Parent company
- Quikrete Holdings Inc.
- Employees
- 7
- MSHA field office
- Reno NV Field Office
- Citations and orders since January 1, 2022
- 7
- Significant and substantial
- 2 (28.6%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $2,548
- Amount paid so far
- $2,548
- Inspections
- 10
- Inspector hours on site
- 94
- Citations per inspection
- 0.70 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- May 27, 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 | 3 | 0 | $399 | 0 |
| 2023 | 4 | 2 | $2,149 | 0 |
Standards cited most at Glass Mountain Pumice
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 56.14107 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.15005 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4130 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 1 |
Other open mines in Modoc County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Fitch Road Pit | Hat Creek Construction & Materials Inc | Modoc County, CA | Construction sand and gravel | 4 | 15 |
| Shaw Pit | Hat Creek Construction & Materials Inc | Modoc County, CA | Construction sand and gravel | 8 | 6 |
| Larranaga Pit | Larranaga Trucking & Construction | Modoc County, CA | Crushed, broken stone | 3 | 3 |
| Portable | White Bear Construction, Inc. | Modoc County, CA | Construction sand and gravel | 1 | 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.