Data / Mines / Washington / Seattle Plant
Seattle Plant, King County, Washington: 357 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Seattle Plant is an active cement processing facility in King County, Washington, operated by Ash Grove Cement Company with 83 employees on MSHA's record (mine ID 4500359). Since January 1, 2022 MSHA inspectors issued 357 citations and orders there with $800,694 in proposed penalties, and 18 accident reports were filed there, with 17 injury or illness cases.
The request: Watch Seattle Plant (MSHA mine ID 4500359) in King County, Washington: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4500359
- Status
- Active since January 1, 1992
- Main commodity
- Cement
- Mine type
- Facility
- County
- King County, Washington
- Nearest town
- Seattle
- Operator
- Ash Grove Cement Company
- Parent company
- CRH PLC
- Employees
- 83
- MSHA field office
- Anchorage AK Field Office
- Citations and orders since January 1, 2022
- 357
- Significant and substantial
- 65 (18.2%)
- Closure orders
- 11
- High negligence or reckless
- 28
- Proposed penalties
- $800,694
- Amount paid so far
- $508,222
- Inspections
- 85
- Inspector hours on site
- 1,094
- Citations per inspection
- 4.20 (all mines 2.30)
- Accident reports
- 18
- Injury and illness cases
- 17
- Fatalities
- 0
- Latest MSHA record
- October 1, 2026
- Citations issued to contractors here
- 15 ($6,352 proposed)
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 | 100 | 12 | $56,220 | 7 |
| 2023 | 101 | 32 | $268,929 | 2 |
| 2024 | 91 | 14 | $274,205 | 4 |
| 2025 | 35 | 4 | $94,301 | 3 |
| 2026 | 30 | 3 | $107,039 | 1 |
Standards cited most at Seattle Plant
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 | 66 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 27 |
| 30 CFR 56.14110 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 22 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 17 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 13 |
| 30 CFR 47.41 | Hazard communication | 9 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12034 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 5 |
Injury and illness cases at Seattle Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 11 |
| No lost time, or an occupational illness | 6 |
What the accident reports at Seattle Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 6 |
| Powered haulage | 3 |
| Slip or fall of person | 2 |
| Handtools (nonpowered) | 1 |
| Exploding vessels under pressure | 1 |
| Entrapment | 1 |
| Machinery | 1 |
| Other | 1 |
| Disorders (physical agents) | 1 |
| Stepping or kneeling on object | 1 |
Equipment named in accident reports at Seattle Plant
| Equipment | Reports |
|---|---|
| Elevator | 2 |
| Front-end loader | 2 |
| Forklift | 1 |
| Hand tools (not powered) | 1 |
| Conveyor | 1 |
| Bench grinder | 1 |
Other open mines in King County, Washington
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| 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 |
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.