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Data / Mines / Grefco Minerals LLC

Grefco Minerals LLC: 1 open mine, 36 MSHA citations

Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.

Grefco Minerals LLC (MSHA operator ID 0170893) operates 1 open mine with 15 employees in Nevada, mostly diatomaceous earth (diatomite). Since January 1, 2022 MSHA inspectors issued it 36 citations and orders with $4,504 in proposed penalties, and it reported no injury or illness cases. Data from MSHA, November 6, 2026.

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MSHA operator ID
0170893
Open mines
1
Employees at open mines
15
States
Nevada
Parent company
Dicalite Management Group LLC
Citations and orders since January 1, 2022
36
Significant and substantial
2 (5.6%)
Closure orders
0
High negligence or reckless
2
Proposed penalties
$4,504
Amount paid so far
$4,504
Inspections
10
Inspector hours on site
79
Citations per inspection
3.60 (all mines 2.30)
Accident reports
0
Injury and illness cases
0
Fatalities
0
Latest MSHA record
November 3, 2026

Open mines of Grefco Minerals LLC

Ranked by citations since January 1, 2022.

MineOperatorCountyMain commodityEmployeesCitations since 2022
Grefco Mine & MillGrefco Minerals LLCNye County, NVDiatomaceous earth (diatomite)1536

Citations and injury cases by year

Calendar years since 2022; 2026 runs to the date of the MSHA files.

YearCitations and ordersSignificant and substantialProposed penaltiesInjury and illness cases
202250$6650
202340$5720
202480$1,1760
202520$3020
2026172$1,7890

Standards cited most at Grefco Minerals LLC

Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.

StandardWhat the part coversCitations
30 CFR 56.14107Surface metal and nonmetal mines6
30 CFR 56.14100Surface metal and nonmetal mines4
30 CFR 56.12008Surface metal and nonmetal mines2
30 CFR 56.4104Surface metal and nonmetal mines2
30 CFR 47.41Hazard communication2
30 CFR 56.14207Surface metal and nonmetal mines2
30 CFR 56.12028Surface metal and nonmetal mines2
30 CFR 56.12018Surface metal and nonmetal mines1
30 CFR 47.51Hazard communication1
30 CFR 48.11Training of miners1
30 CFR 45.4Part 451
30 CFR 56.13015Surface metal and nonmetal mines1
30 CFR 56.14112Surface metal and nonmetal mines1
30 CFR 56.4011Surface metal and nonmetal mines1
30 CFR 56.12019Surface metal and nonmetal mines1

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.