Data / Mines / Washington / Pierce County
Mines in Pierce County, Washington: 12 open mines
MSHA lists 12 open mines in Pierce County, Washington, run by 8 operators and employing 177 people. Since January 1, 2022 its inspectors issued 408 citations and orders there with $178,967 in proposed penalties, and operators reported 42 injury or illness cases. The operators with the most open mines are Miles Sand & Gravel Co Inc; Washington Rock Quarries, Inc.; HM Pacific Northwest Inc.. Data from MSHA, November 6, 2026.
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- Open mines
- 12
- Operators
- 8
- Employees
- 177
- Active
- 12
- Citations and orders since January 1, 2022
- 408
- Significant and substantial
- 61 (15.0%)
- Closure orders
- 7
- High negligence or reckless
- 17
- Proposed penalties
- $178,967
- Amount paid so far
- $158,910
- Inspections
- 177
- Inspector hours on site
- 1,666
- Citations per inspection
- 2.31 (all mines 2.30)
- Accident reports
- 43
- Injury and illness cases
- 42
- Fatalities
- 0
- Latest MSHA record
- October 19, 2026
Operators with the most open mines in Pierce County, Washington
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Miles Sand & Gravel Co Inc | 3 | 23 | 82 | $26,929 | 10 |
| Washington Rock Quarries, Inc. | 2 | 32 | 94 | $71,541 | 21 |
| HM Pacific Northwest Inc. | 2 | 12 | 86 | $50,467 | 4 |
| Mountain Stone Aggregate | 1 | 2 | 51 | $15,455 | 0 |
| CalPortland Company | 1 | 57 | 34 | $5,894 | 6 |
| Lynch Creek Quarry LLC | 1 | 5 | 22 | $2,612 | 0 |
| Kennedy Creek Quarry Incorporated | 1 | 5 | 21 | $3,509 | 0 |
| Graymont Western US Inc | 1 | 41 | 18 | $2,560 | 1 |
Operators with the most citations in Pierce County, Washington
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Washington Rock Quarries, Inc. | 2 | 32 | 94 | $71,541 | 21 |
| HM Pacific Northwest Inc. | 2 | 12 | 86 | $50,467 | 4 |
| Miles Sand & Gravel Co Inc | 3 | 23 | 82 | $26,929 | 10 |
| Mountain Stone Aggregate | 1 | 2 | 51 | $15,455 | 0 |
| CalPortland Company | 1 | 57 | 34 | $5,894 | 6 |
| Lynch Creek Quarry LLC | 1 | 5 | 22 | $2,612 | 0 |
| Kennedy Creek Quarry Incorporated | 1 | 5 | 21 | $3,509 | 0 |
| Graymont Western US Inc | 1 | 41 | 18 | $2,560 | 1 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Kapowsin Quarry | Washington Rock Quarries, Inc. | Pierce County, WA | Crushed, broken traprock | 9 | 59 |
| C&V Roy Pit | Mountain Stone Aggregate | Pierce County, WA | Construction sand and gravel | 2 | 51 |
| Sumner Pit And Plant | HM Pacific Northwest Inc. | Pierce County, WA | Construction sand and gravel | 2 | 49 |
| Fennel Resources | Miles Sand & Gravel Co Inc | Pierce County, WA | Construction sand and gravel | 11 | 42 |
| Thun Field Pit | HM Pacific Northwest Inc. | Pierce County, WA | Construction sand and gravel | 10 | 37 |
| King Creek Pit | Washington Rock Quarries, Inc. | Pierce County, WA | Construction sand and gravel | 23 | 35 |
| Dupont Pit | CalPortland Company | Pierce County, WA | Construction sand and gravel | 57 | 34 |
| Roy | Miles Sand & Gravel Co Inc | Pierce County, WA | Construction sand and gravel | 8 | 31 |
| Lynch Creek Quarry LLC | Lynch Creek Quarry LLC | Pierce County, WA | Crushed, broken stone | 5 | 22 |
| Portable 1 | Kennedy Creek Quarry Incorporated | Pierce County, WA | Construction sand and gravel | 5 | 21 |
| Tacoma Plant | Graymont Western US Inc | Pierce County, WA | Lime | 41 | 18 |
| Canyon Resources | Miles Sand & Gravel Co Inc | Pierce County, WA | Construction sand and gravel | 4 | 9 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 9 | 75% |
| Crushed, broken stone | 1 | 8.3% |
| Crushed, broken traprock | 1 | 8.3% |
| Lime | 1 | 8.3% |
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 | 82 | 15 | $33,130 | 7 |
| 2023 | 44 | 6 | $44,359 | 8 |
| 2024 | 94 | 15 | $19,522 | 5 |
| 2025 | 124 | 19 | $66,384 | 15 |
| 2026 | 64 | 6 | $15,572 | 7 |
Standards cited most at mines in Pierce County, Washington
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 56.14107 | Surface metal and nonmetal mines | 43 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 37 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 34 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 21 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 20 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 15 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.14110 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 7 |
Injury and illness cases at mines in Pierce County, Washington
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 27 |
| No lost time, or an occupational illness | 15 |
What the accident reports at mines in Pierce County, Washington describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 16 |
| Powered haulage | 7 |
| Slip or fall of person | 6 |
| Handtools (nonpowered) | 6 |
| Disorders (repeated trauma) | 3 |
| Other | 2 |
| Striking or bumping | 1 |
| Nonpowered haulage | 1 |
| Machinery | 1 |
Equipment named in accident reports at mines in Pierce County, Washington
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 6 |
| Front-end loader | 5 |
| Ore haulage trucks - off highway trucks | 3 |
| Forklift | 2 |
| Conveyor | 1 |
| Screen | 1 |
| Machine | 1 |
| Trucks | 1 |
| Hand tools (powered) | 1 |
Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. 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.