Data / Mines / Montana / Lewis And Clark County
Mines in Lewis And Clark County, Montana: 10 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 10 open mines in Lewis And Clark County, Montana, run by 9 operators and employing 29 people. Since January 1, 2022 its inspectors issued 80 citations and orders there with $12,107 in proposed penalties, and operators reported no injury or illness cases. The operators with the most open mines are Montana Mtls & Cons; Bullock Contracting LLC; Ironside Stone Works Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 10
- Operators
- 9
- Employees
- 29
- Intermittent
- 8
- Active
- 2
- Mines run by individuals, counted and not listed
- 2
- Citations and orders since January 1, 2022
- 80
- Significant and substantial
- 7 (8.8%)
- Closure orders
- 1
- High negligence or reckless
- 9
- Proposed penalties
- $12,107
- Amount paid so far
- $11,352
- Inspections
- 48
- Inspector hours on site
- 237
- Citations per inspection
- 1.67 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- October 6, 2026
Operators with the most open mines in Lewis And Clark County, Montana
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 |
|---|---|---|---|---|---|
| Montana Mtls & Cons | 2 | 5 | 7 | $1,059 | 0 |
| Bullock Contracting LLC | 1 | 4 | 18 | $2,618 | 0 |
| Ironside Stone Works Inc | 1 | 3 | 15 | $2,325 | 0 |
| Mike Wirth Construction | 1 | 3 | 10 | $1,498 | 0 |
| Valley Excavating Sand & Gravel LLC | 1 | 4 | 8 | $727 | 0 |
| Debco Construction | 1 | 3 | 6 | $1,519 | 0 |
| Cornerstone Crushing LLC | 1 | 2 | 1 | $151 | 0 |
Operators with the most citations in Lewis And Clark County, Montana
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Bullock Contracting LLC | 1 | 4 | 18 | $2,618 | 0 |
| Ironside Stone Works Inc | 1 | 3 | 15 | $2,325 | 0 |
| Mike Wirth Construction | 1 | 3 | 10 | $1,498 | 0 |
| Valley Excavating Sand & Gravel LLC | 1 | 4 | 8 | $727 | 0 |
| Montana Mtls & Cons | 2 | 5 | 7 | $1,059 | 0 |
| Debco Construction | 1 | 3 | 6 | $1,519 | 0 |
| Cornerstone Crushing LLC | 1 | 2 | 1 | $151 | 0 |
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 |
|---|---|---|---|---|---|
| Port #1 | Bullock Contracting LLC | Lewis And Clark County, MT | Construction sand and gravel | 4 | 18 |
| Ironside Stone Works Quarry | Ironside Stone Works Inc | Lewis And Clark County, MT | Dimension slate | 3 | 15 |
| Wirth Quarry | Mike Wirth Construction | Lewis And Clark County, MT | Construction sand and gravel | 3 | 10 |
| Valley Sand & Gravel (Portable) | Valley Excavating Sand & Gravel LLC | Lewis And Clark County, MT | Construction sand and gravel | 4 | 8 |
| Helena Sand & Gravel-Portable Wash Plant | Montana Mtls & Cons | Lewis And Clark County, MT | Construction sand and gravel | 3 | 7 |
| Portable Operations 2 | Debco Construction | Lewis And Clark County, MT | Construction sand and gravel | 3 | 6 |
| Portable 45 200 | Cornerstone Crushing LLC | Lewis And Clark County, MT | Construction sand and gravel | 2 | 1 |
| Screen Plant | Montana Mtls & Cons | Lewis And Clark County, MT | Construction sand and gravel | 2 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 8 | 80% |
| Dimension slate | 1 | 10% |
| Gold ore | 1 | 10% |
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 | 3 | 1 | $471 | 0 |
| 2023 | 26 | 3 | $3,808 | 0 |
| 2024 | 16 | 0 | $2,369 | 0 |
| 2025 | 16 | 2 | $2,631 | 0 |
| 2026 | 19 | 1 | $2,828 | 0 |
Standards cited most at mines in Lewis And Clark County, Montana
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 | 26 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.4200 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 2 |
| 30 CFR 47.41 | Hazard communication | 2 |
| 30 CFR 56.12002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 2 |
| 30 CFR 47.44 | Hazard communication | 2 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 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.