Data / Mines / Washington / King County
Mines in King County, Washington: 19 open mines
MSHA lists 19 open mines in King County, Washington, run by 14 operators and employing 203 people. Since January 1, 2022 its inspectors issued 755 citations and orders there with $995,998 in proposed penalties, and operators reported 47 injury or illness cases. The operators with the most open mines are CalPortland Company; HM Pacific Northwest Inc.; Lakeside Industries, Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 19
- Operators
- 14
- Employees
- 203
- Active
- 17
- Intermittent
- 2
- Citations and orders since January 1, 2022
- 755
- Significant and substantial
- 133 (17.6%)
- Closure orders
- 16
- High negligence or reckless
- 48
- Proposed penalties
- $995,998
- Amount paid so far
- $698,282
- Inspections
- 322
- Inspector hours on site
- 2,723
- Citations per inspection
- 2.34 (all mines 2.30)
- Accident reports
- 48
- Injury and illness cases
- 47
- Fatalities
- 0
- Latest MSHA record
- October 1, 2026
Operators with the most open mines in King 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 |
|---|---|---|---|---|---|
| CalPortland Company | 3 | 45 | 113 | $116,647 | 11 |
| HM Pacific Northwest Inc. | 3 | 21 | 86 | $25,144 | 6 |
| Lakeside Industries, Inc | 2 | 16 | 54 | $9,661 | 1 |
| Ash Grove Cement Company | 1 | 83 | 357 | $800,694 | 17 |
| Central Pre-Mix Concrete Co. | 1 | 3 | 31 | $19,789 | 8 |
| Ryterra | 1 | 6 | 28 | $4,401 | 0 |
| Green Section 30 LLC | 1 | 3 | 25 | $6,123 | 1 |
| Acg Materials | 1 | 12 | 22 | $4,611 | 2 |
| Rock Services Inc. | 1 | 2 | 12 | $4,973 | 0 |
| Manufacturers Mineral Company | 1 | 3 | 9 | $1,299 | 0 |
| Kangley Sand & Gravel | 1 | 2 | 8 | $1,186 | 0 |
| Jensen Sand & Gravel | 1 | 2 | 7 | $1,033 | 0 |
| KLB Construction LLC | 1 | 3 | 2 | $286 | 0 |
| Severson Road Contractors | 1 | 2 | 1 | $151 | 1 |
Operators with the most citations in King 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 |
|---|---|---|---|---|---|
| Ash Grove Cement Company | 1 | 83 | 357 | $800,694 | 17 |
| CalPortland Company | 3 | 45 | 113 | $116,647 | 11 |
| HM Pacific Northwest Inc. | 3 | 21 | 86 | $25,144 | 6 |
| Lakeside Industries, Inc | 2 | 16 | 54 | $9,661 | 1 |
| Central Pre-Mix Concrete Co. | 1 | 3 | 31 | $19,789 | 8 |
| Ryterra | 1 | 6 | 28 | $4,401 | 0 |
| Green Section 30 LLC | 1 | 3 | 25 | $6,123 | 1 |
| Acg Materials | 1 | 12 | 22 | $4,611 | 2 |
| Rock Services Inc. | 1 | 2 | 12 | $4,973 | 0 |
| Manufacturers Mineral Company | 1 | 3 | 9 | $1,299 | 0 |
| Kangley Sand & Gravel | 1 | 2 | 8 | $1,186 | 0 |
| Jensen Sand & Gravel | 1 | 2 | 7 | $1,033 | 0 |
| KLB Construction LLC | 1 | 3 | 2 | $286 | 0 |
| Severson Road Contractors | 1 | 2 | 1 | $151 | 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 |
|---|---|---|---|---|---|
| Seattle Plant | Ash Grove Cement Company | King County, WA | Cement | 83 | 357 |
| Snoqualmie S&G DBA CalPortland Company | CalPortland Company | King County, WA | Construction sand and gravel | 29 | 86 |
| Enumclaw Pit & Plant | HM Pacific Northwest Inc. | King County, WA | Construction sand and gravel | 12 | 39 |
| Issaquah Pit & Plant | Lakeside Industries, Inc | King County, WA | Construction sand and gravel | 11 | 35 |
| Auburn Facility | Central Pre-Mix Concrete Co. | King County, WA | Construction sand and gravel | 3 | 31 |
| Ryterra LLC | Ryterra | King County, WA | Crushed, broken stone | 6 | 28 |
| North Bend | HM Pacific Northwest Inc. | King County, WA | Crushed, broken stone | 6 | 28 |
| Franklin Ridge Sand & Gravel | Green Section 30 LLC | King County, WA | Construction sand and gravel | 3 | 25 |
| Arcosa Specialty Materials Seattle #1890 | Acg Materials | King County, WA | Crushed, broken limestone | 12 | 22 |
| Palmer Junction Gravel Pit-Kanaskat Pit | Lakeside Industries, Inc | King County, WA | Construction sand and gravel | 5 | 19 |
| Thunder Mountain Quarry | HM Pacific Northwest Inc. | King County, WA | Crushed, broken traprock | 3 | 19 |
| Vashon Sand and Gravel DBA CalPortland | CalPortland Company | King County, WA | Construction sand and gravel | 6 | 14 |
| White River Quarry | CalPortland Company | King County, WA | Crushed, broken stone | 10 | 13 |
| Plant D | Rock Services Inc. | King County, WA | Construction sand and gravel | 2 | 12 |
| Manufacturers Mineral Co. Renton Plant | Manufacturers Mineral Company | King County, WA | Construction sand and gravel | 3 | 9 |
| Kangley Pit | Kangley Sand & Gravel | King County, WA | Construction sand and gravel | 2 | 8 |
| Jensen Portable Screens | Jensen Sand & Gravel | King County, WA | Construction sand and gravel | 2 | 7 |
| Elk Heights Pit | KLB Construction LLC | King County, WA | Construction sand and gravel | 3 | 2 |
| Portable 1 | Severson Road Contractors | King County, WA | Crushed, broken stone | 2 | 1 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 12 | 63.2% |
| Crushed, broken stone | 4 | 21.1% |
| Cement | 1 | 5.3% |
| Crushed, broken traprock | 1 | 5.3% |
| Crushed, broken limestone | 1 | 5.3% |
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 | 163 | 21 | $69,144 | 13 |
| 2023 | 168 | 45 | $294,693 | 8 |
| 2024 | 171 | 22 | $292,623 | 11 |
| 2025 | 160 | 37 | $219,676 | 10 |
| 2026 | 93 | 8 | $119,862 | 5 |
Standards cited most at mines in King 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 56.20003 | Surface metal and nonmetal mines | 106 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 52 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 52 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 50 |
| 30 CFR 56.14110 | Surface metal and nonmetal mines | 44 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 42 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 32 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 21 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 21 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 16 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 15 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 12 |
Injury and illness cases at mines in King County, Washington
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 33 |
| No lost time, or an occupational illness | 14 |
What the accident reports at mines in King County, Washington describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 15 |
| Powered haulage | 10 |
| Slip or fall of person | 9 |
| Machinery | 5 |
| Handtools (nonpowered) | 3 |
| Exploding vessels under pressure | 1 |
| Entrapment | 1 |
| Other | 1 |
| Disorders (physical agents) | 1 |
| Stepping or kneeling on object | 1 |
Equipment named in accident reports at mines in King County, Washington
| Equipment | Reports |
|---|---|
| Front-end loader | 5 |
| Hand tools (not powered) | 4 |
| Conveyor | 3 |
| Ore haulage trucks - off highway trucks | 3 |
| Welding machine | 3 |
| Forklift | 2 |
| Elevator | 2 |
| Bench grinder | 2 |
| Screen | 2 |
| Trucks | 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.