Data / Mines / Nevada / Arcosa Adams Claim #1850
Arcosa Adams Claim #1850: 19 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Arcosa Adams Claim #1850 is an active gypsum surface mine in Lyon County, Nevada, operated by Acg Materials with 83 employees on MSHA's record (mine ID 2600668). Since January 1, 2022 MSHA inspectors issued 19 citations and orders there with $3,681 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Arcosa Adams Claim #1850 (MSHA mine ID 2600668) in Lyon County, Nevada: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 2600668
- Status
- Active since January 10, 1979
- Main commodity
- Gypsum
- Mine type
- Surface
- County
- Lyon County, Nevada
- Nearest town
- Moundhouse
- Operator
- Acg Materials
- Parent company
- CRH PLC
- Employees
- 83
- MSHA field office
- Reno NV Field Office
- Citations and orders since January 1, 2022
- 19
- Significant and substantial
- 4 (21.1%)
- Closure orders
- 0
- High negligence or reckless
- 1
- Proposed penalties
- $3,681
- Amount paid so far
- $2,961
- Inspections
- 13
- Inspector hours on site
- 110
- Citations per inspection
- 1.46 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- August 20, 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 | 4 | 1 | $651 | 0 |
| 2023 | 1 | 0 | $143 | 0 |
| 2024 | 7 | 2 | $1,577 | 0 |
| 2025 | 1 | 1 | $288 | 0 |
| 2026 | 6 | 0 | $1,022 | 0 |
Standards cited most at Arcosa Adams Claim #1850
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 | 3 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 47.44 | Hazard communication | 1 |
| 30 CFR 56.12023 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.15001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9315 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 47.41 | Hazard communication | 1 |
Other open mines in Lyon County, Nevada
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Anthem 1 | Anthem Copper LLC | Lyon County, NV | Copper ore | 95 | 129 |
| Nevada Cement Co Cement Plant | Nevada Cement Company | Lyon County, NV | Cement | 123 | 121 |
| Dayton Materials | 3D Concrete LLC | Lyon County, NV | Construction sand and gravel | 10 | 78 |
| Moundhouse Aggregate Pit | V & T Rock Inc. | Lyon County, NV | Construction sand and gravel | 3 | 9 |
| Maggie Creek Ranch Pit | Q&D Construction LLC | Lyon County, NV | Sand, industrial | 12 | 7 |
| Fernley Plant | Imerys Filtration Minerals, Inc. | Lyon County, NV | Diatomaceous earth (diatomite) | 16 | 6 |
| Crc450x | H E Hunewill Construction Company Inc | Lyon County, NV | Construction sand and gravel | 4 | 6 |
| Spring Valley Mine | Geo-Nevada Inc. | Lyon County, NV | Gold ore | 3 | 6 |
| 1830PH SN. 412035 | H E Hunewill Construction Company Inc | Lyon County, NV | Construction sand and gravel | 2 | 5 |
| Cedar Rapids 3042 Portable Jaw Plant | H E Hunewill Construction Company Inc | Lyon County, NV | Construction sand and gravel | 2 | 5 |
| Basalite Dayton | Basalite Concrete Products, LLC | Lyon County, NV | Crushed, broken stone | 5 | 4 |
| Yerington Pit | Cinderlite Aggregates | Lyon County, NV | Construction sand and gravel | 3 | 4 |
| Juniper Ridge Quarry | Joy Engineering | Lyon County, NV | Construction sand and gravel | 5 | 3 |
| NV Aggregates Screen #1 | Cruz Construction | Lyon County, NV | Construction sand and gravel | 5 | 2 |
| NV Aggregates Jaw #1 | Cruz Construction | Lyon County, NV | Construction sand and gravel | 5 | 2 |
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.