Data / Mines / Wyoming / Portable #1
Portable #1, Big Horn County, Wyoming: 21 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Portable #1 is a temporarily idled construction sand and gravel surface mine in Big Horn County, Wyoming, operated by Mountain Construction Company with 13 employees on MSHA's record (mine ID 4801636). Since January 1, 2022 MSHA inspectors issued 21 citations and orders there with $21,925 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Portable #1 (MSHA mine ID 4801636) in Big Horn County, Wyoming: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4801636
- Status
- Temporarily Idled since May 13, 2026
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Big Horn County, Wyoming
- Nearest town
- Lovell
- Operator
- Mountain Construction Company
- Employees
- 13
- MSHA field office
- Gillette WY Field Office
- Citations and orders since January 1, 2022
- 21
- Significant and substantial
- 7 (33.3%)
- Closure orders
- 0
- High negligence or reckless
- 3
- Proposed penalties
- $21,925
- Amount paid so far
- $21,925
- Inspections
- 7
- Inspector hours on site
- 58
- Citations per inspection
- 3.00 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- January 7, 2026
- Citations issued to contractors here
- 1 ($147 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 | 7 | 5 | $18,795 | 1 |
| 2023 | 3 | 1 | $1,230 | 0 |
| 2024 | 2 | 0 | $294 | 0 |
| 2025 | 6 | 0 | $906 | 0 |
| 2026 | 3 | 1 | $700 | 0 |
Standards cited most at Portable #1
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 | 4 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12025 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14211 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11027 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14110 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4200 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.14130 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Portable #1
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
What the accident reports at Portable #1 describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 1 |
Other open mines in Big Horn County, Wyoming
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Lovell Mill | American Colloid Company Mineral Group | Big Horn County, WY | Bentonite | 44 | 52 |
| Magnet Cove Mill | Wyo-Ben, Inc | Big Horn County, WY | Bentonite | 36 | 35 |
| Crusher #1 | Frost Rock Products Company | Big Horn County, WY | Construction sand and gravel | 3 | 33 |
| BPM Lovell Mill | Bentonite Performance Minerals, LLC | Big Horn County, WY | Bentonite | 62 | 27 |
| Stucco Mill | Wyo-Ben, Inc | Big Horn County, WY | Bentonite | 30 | 16 |
| G-P Gypsum Quarries | Georgia-Pacific Gypsum LLC | Big Horn County, WY | Gypsum | 17 | 14 |
| Sage Creek Mill | Wyo-Ben, Inc | Big Horn County, WY | Bentonite | 17 | 13 |
| Magnet Cove Mine | Wyo-Ben, Inc | Big Horn County, WY | Bentonite | 37 | 11 |
| 3J Crushing Plant | 3J Trucking LLC | Big Horn County, WY | Construction sand and gravel | 4 | 5 |
| Big Horn Basin Mines | Wyo-Ben, Inc | Big Horn County, WY | Bentonite | 11 | 2 |
| BPM Lovell Mine | Bentonite Performance Minerals, LLC | Big Horn County, WY | Bentonite | 23 | 1 |
| Molnar Pit | Big Horn Redi-Mix Inc | Big Horn County, WY | Construction sand and gravel | 4 | 1 |
| Capwood Properties | River Rock, LLC | Big Horn County, WY | Construction sand and gravel | 1 | 1 |
| Yellowtail Mine | American Colloid Company Mineral Group | Big Horn County, WY | Bentonite | 14 | 0 |
| Highland Excavation Pit | Highland Excavation & Construction, Inc. | Big Horn County, WY | Construction sand and gravel | 3 | 0 |
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.