| Deposit ID | 10205784 |
|---|---|
| MAS/MILS ID | 0551050009 |
| Record type | Site |
| Current site name | Bjoin Quarry |
| Alternate or previous names | Onsgard Limestone, Bass Quarry |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -88.93976, 42.62941 (WGS84) |
| Elevation | 274 |
Political divisions (FIPS codes)
Rock(county)
Wisconsin(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Janesville East(quadrangle 1:24,000 scale)
Lake Geneva(quadrangle 1:100,000 scale)
Rockford(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Rock(hydrologic unit)
Rock(hydrologic accounting unit)
Rock(hydrologic subregion)
Upper Mississippi(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Wisconsin | Rock |
| Commodity | Importance |
|---|---|
| Stone, Crushed/Broken | Primary |
| Ore Body (1) | -88.93976, 42.62941 |
|---|
| Operation type | Surface |
|---|---|
| Development status | Producer |
| Commodity type | Non-metallic |
| Significant | No |
| Ownership category | Private |
|---|
| Type | Unknown |
|---|---|
| Owner | Onsgard Limestone |
| ID | 4701111 |
| Year | 1979 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0551050009 | |
| Mine Safety and Health Administration | MSHA | MSHA | 4701111 |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 07-OCT-1982 | Eastern Field Operations Center (EFOC) | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
| Status | Active since 11/05/2025 |
|---|---|
| MSHA mine ID | 4701111 |
| Mine name (MSHA) | Portable Unit #1 |
| Current operator | Bjoin Limestone Inc |
| Current controller (parent) | Kristopher P Bjoin; Shaun M Bjoin; Jonathan M Bjoin |
| 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MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date.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.