| Deposit ID | 10271328 |
|---|---|
| MAS/MILS ID | 0320199002 |
| Record type | Site |
| Current site name | Cr Minerals Mill |
| Alternate or previous names | Cyprus Mill, United Sierra Mill, C & R Minerals Mill |
| Point of reference | Plant |
|---|---|
| Geographic coordinates: | -119.23569, 39.6152 (WGS84) |
| Location accuracy | 1000(meters) |
Political divisions (FIPS codes)
Lyon(county)
Nevada(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Fernley East(quadrangle 1:24,000 scale)
Reno(quadrangle 1:100,000 scale)
Reno(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Granite Springs Valley(hydrologic unit)
Truckee(hydrologic accounting unit)
Central Lahontan(hydrologic subregion)
Great Basin(hydrologic region)
Federal lands
USBR(Federal land areas administered by USBR)
| Country | State | County |
|---|---|---|
| United States | Nevada | Lyon |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 020 N | 024 E | 12 | Nevada |
| Commodity | Importance |
|---|---|
| Diatomite | Primary |
| Plant (1) | -119.23569, 39.6152 |
|---|
| Operation type | Processing Plant |
|---|---|
| Development status | Producer |
| Commodity type | Non-metallic |
| Significant | No |
| Ownership category | Private |
|---|
| Type | Operator |
|---|---|
| Owner | Cyprus Mines Corp. |
| ID | 2600816 |
| Home office | Nevada |
| Year | 1975 |
| Type | Operator |
|---|---|
| Owner | Nevada Cement Co. |
| Home office | Nevada |
| Year | 1988 |
| Type | Owner-Operator |
|---|---|
| Owner | Cr Minerals Corp. |
| ID | 2600816 |
| Home office | Nevada |
| Year | 1989 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0320199002 | |
| Mine Safety and Health Administration | MSHA | MSHA | 2600816 |
NEV. DIV. MINE INSPECTION, 1976, DIRECTORY OF NEVADA MINE
OPERATIONS ACTIVE DURING CALENDAR YEAR, 1975, P. 39.
NEV. DIV. MINE INSPECTION, 1993, DIRECTORY OF NEVADA MINE
OPERATIONS ACTIVE DURING CALENDAR YEAR, 1992, P. 55.
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 02-MAR-94 | Ridenour, James | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
| Status | Active since 01/14/1992 |
|---|---|
| MSHA mine ID | 2600816 |
| Mine name (MSHA) | Fernley Plant |
| Current operator | Imerys Filtration Minerals Inc |
| Current controller (parent) | Imerys S A |
| Mine type | Surface (Metal / non-metal) |
MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.
Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.
MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:
Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.