| Deposit ID | 10204690 |
|---|---|
| MAS/MILS ID | 0530570350 |
| Record type | Site |
| Current site name | Twin Sisters Pit and Mill |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -121.88734, 48.63761 (WGS84) |
| Elevation | 732 |
| Location accuracy | 1000(meters) |
Political divisions (FIPS codes)
Skagit(county)
Washington(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Twin Sisters Mountain(quadrangle 1:24,000 scale)
Mount Baker(quadrangle 1:100,000 scale)
Concrete(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Nooksack(hydrologic unit)
Puget Sound(hydrologic accounting unit)
Puget Sound(hydrologic subregion)
Pacific Northwest(hydrologic region)
Federal lands
Mt. Baker-Snoqualmie National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Washington | Skagit |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Willamette | 036 N | 007 E | 03 | C | Washington |
| Commodity | Importance |
|---|---|
| Stone, Crushed/Broken | Primary |
| Ore Body (1) | -121.88734, 48.63761 |
|---|
| Operation type | Surface |
|---|---|
| Development status | Past Producer |
| Commodity type | Non-metallic |
| Significant | No |
| Ownership category | National Forest |
|---|
| Type | Operator |
|---|---|
| Owner | Olson Taylor Co. |
| ID | 4501165 |
| Home office | Washington |
| Year | 1979 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0530570350 | |
| Mine Safety and Health Administration | MSHA | MSHA | 4501165 |
MSHA MINE FILE REFERENCE JUNE 1979
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 12-MAR-85 | Western Field Operations Center (WFOC) | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
| Status | Abandoned since 04/30/1985 |
|---|---|
| MSHA mine ID | 4501165 |
| Mine name (MSHA) | Twin Sisters Quarry |
| Current operator | Aimcor Olivine |
| Current controller (parent) | Charles Gallagher |
| 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MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date.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.