Data / Mines / California / Swa @ Mountain Gate Quarry
Swa @ Mountain Gate Quarry: 25 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Swa @ Mountain Gate Quarry is an active crushed, broken stone surface mine in Shasta County, California, operated by Stimpel Wiebelhaus Associates Inc. with 8 employees on MSHA's record (mine ID 0405504). Since January 1, 2022 MSHA inspectors issued 25 citations and orders there with $3,480 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Swa @ Mountain Gate Quarry (MSHA mine ID 0405504) in Shasta County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0405504
- Status
- Active since October 21, 2001
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Shasta County, California
- Nearest town
- Redding
- Operator
- Stimpel Wiebelhaus Associates Inc.
- Employees
- 8
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 25
- Significant and substantial
- 1 (4.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $3,480
- Amount paid so far
- $3,480
- Inspections
- 13
- Inspector hours on site
- 117
- Citations per inspection
- 1.92 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- October 21, 2026
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 13 | 1 | $1,994 | 0 |
| 2023 | 2 | 0 | $286 | 0 |
| 2024 | 2 | 0 | $294 | 0 |
| 2025 | 6 | 0 | $906 | 1 |
| 2026 | 2 | 0 | $0 | 0 |
Standards cited most at Swa @ Mountain Gate Quarry
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 4 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.6132 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.6102 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.3200 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14109 | Surface metal and nonmetal mines | 1 |
| 30 CFR 47.41 | Hazard communication | 1 |
| 30 CFR 58.620 | Part 58 | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4102 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12013 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Swa @ Mountain Gate Quarry
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
What the accident reports at Swa @ Mountain Gate Quarry describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 1 |
Equipment named in accident reports at Swa @ Mountain Gate Quarry
| Equipment | Reports |
|---|---|
| Hand tools (powered) | 1 |
Other open mines in Shasta County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Redding Plant | CalPortland Company | Shasta County, CA | Cement | 73 | 222 |
| Dicalite Minerals | Dicalite Minerals LLC | Shasta County, CA | Diatomaceous earth (diatomite) | 53 | 38 |
| Crystal Creek Aggregates | Tullis & Associates Inc | Shasta County, CA | Construction sand and gravel | 4 | 32 |
| Aggregate Products | Aggregate Products | Shasta County, CA | Construction sand and gravel | 7 | 21 |
| Fawndale Rock & Asphalt | Fawndale Rock & Asphalt | Shasta County, CA | Crushed, broken stone | 7 | 16 |
| Packway Portable | Packway Materials Inc | Shasta County, CA | Sand, industrial | 3 | 13 |
| Twin Mine | Palo Cedro Sand & Gravel LP | Shasta County, CA | Construction sand and gravel | 4 | 9 |
| Washington Mine | French Gulch (Nevada) Mining Corp | Shasta County, CA | Gold ore | 8 | 5 |
| Westside Aggregate | Westside Aggregate | Shasta County, CA | Construction sand and gravel | 4 | 3 |
| Latona Aggregates | Tullis & Associates Inc | Shasta County, CA | Sand, industrial | 3 | 1 |
| Shea Sand & Gravel | J F Shea Company Inc | Shasta County, CA | Construction sand and gravel | 1 | 1 |
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.