Data / Mines / California / Tapo Rock & Sand
Tapo Rock & Sand: 4 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Tapo Rock & Sand is an active construction sand and gravel surface mine in Ventura County, California, operated by Tapo Rock & Sand with 5 employees on MSHA's record (mine ID 0404212). Since January 1, 2022 MSHA inspectors issued 4 citations and orders there with $596 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Tapo Rock & Sand (MSHA mine ID 0404212) in Ventura County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0404212
- Status
- Active since June 17, 2002
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Ventura County, California
- Nearest town
- Simi Valley
- Operator
- Tapo Rock & Sand
- Employees
- 5
- MSHA field office
- San Bernardino CA Field Office
- Citations and orders since January 1, 2022
- 4
- Significant and substantial
- 1 (25.0%)
- Closure orders
- 0
- High negligence or reckless
- 1
- Proposed penalties
- $596
- Amount paid so far
- $596
- Inspections
- 12
- Inspector hours on site
- 44
- Citations per inspection
- 0.33 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- July 15, 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 |
|---|---|---|---|---|
| 2023 | 1 | 1 | $143 | 0 |
| 2025 | 2 | 0 | $302 | 0 |
| 2026 | 1 | 0 | $151 | 0 |
Standards cited most at Tapo Rock & Sand
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 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4402 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.16001 | Surface metal and nonmetal mines | 1 |
Other open mines in Ventura County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Grimes Rock a CalPortland Company | CalPortland Company | Ventura County, CA | Construction sand and gravel | 14 | 43 |
| Canyon Rock Plant | Gillibrand Industrial Sands, LLC | Ventura County, CA | Sand, industrial | 55 | 40 |
| Arcosa Frazier Park Plant# 1603 | Arcosa Lwfp, LLC | Ventura County, CA | Clay, ceramic, refractory mnls. | 22 | 37 |
| Santa Paula Materials | Santa Paula Materials | Ventura County, CA | Construction sand and gravel | 8 | 24 |
| Wayne J. Sand & Gravel Inc. | Wayne J. Sand & Gravel Inc. | Ventura County, CA | Construction sand and gravel | 14 | 23 |
| Moorpark Quarry | Cemex Construction Materials Pacific, LLC | Ventura County, CA | Construction sand and gravel | 9 | 21 |
| Pacific Rock Inc | Pacific Rock Inc | Ventura County, CA | Crushed, broken stone | 5 | 9 |
| Ojai Quarry | MRC Rock & Sand, LLC. | Ventura County, CA | Crushed, broken granite | 2 | 7 |
| S-6 Red | Upland Rock | Ventura County, CA | Sand, common | 2 | 3 |
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.