| Deposit ID | 10238695 |
|---|---|
| MAS/MILS ID | 0061090229 |
| Record type | Site |
| Current site name | Columbia Quarry |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -120.4249, 38.06571 (WGS84) |
| Elevation | 549 |
| Location accuracy | 100(meters) |
Political divisions (FIPS codes)
Tuolumne(county)
California(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Columbia(quadrangle 1:24,000 scale)
San Andreas(quadrangle 1:100,000 scale)
Sacramento(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Stanislaus(hydrologic unit)
San Joaquin(hydrologic accounting unit)
San Joaquin(hydrologic subregion)
California(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | California | Tuolumne |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 003 N | 014 E | 34 | SW | California |
| Commodity | Importance |
|---|---|
| Magnesite | Primary |
| Ore Body (1) | -120.4249, 38.06571 |
|---|
| Operation type | Surface |
|---|---|
| Development status | Producer |
| Commodity type | Metallic |
| Significant | No |
| Ownership category | Unknown |
|---|
| Type | Owner-Operator |
|---|---|
| Owner | Merck And Co. |
| ID | 402297 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0061090229 | |
| Mine Safety and Health Administration | MSHA | MSHA | 0402297 |
SEE CARD FOR SEC 34 3N 14E
CALIF. DIV. MINES AND GEOLOGY SPECIAL PUBLICATION 103, 1990.
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 06-MAR-1991 | Lowe, Nathan T. | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
| Status | Abandoned since 03/28/1995 |
|---|---|
| MSHA mine ID | 0402297 |
| Mine name (MSHA) | Columbia Quarry |
| Current operator | Marine Magnesium Company |
| Current controller (parent) | Cph Sub Inc & Marine Magnesium Management Company |
| 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MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date.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.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.