Data / Mines / Wyoming / Portable #3
Portable #3, Sheridan County, Wyoming: 1 MSHA citation
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Portable #3 is a temporarily idled construction sand and gravel surface mine in Sheridan County, Wyoming, operated by Mullinax Inc with 3 employees on MSHA's record (mine ID 4801898). Since January 1, 2022 MSHA inspectors issued 1 citation and orders there with $151 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Portable #3 (MSHA mine ID 4801898) in Sheridan County, Wyoming: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4801898
- Status
- Temporarily Idled since August 27, 2025
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Sheridan County, Wyoming
- Nearest town
- Sheridan
- Operator
- Mullinax Inc
- Employees
- 3
- MSHA field office
- Gillette WY Field Office
- Citations and orders since January 1, 2022
- 1
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $151
- Amount paid so far
- $151
- Inspections
- 2
- Inspector hours on site
- 12
- Citations per inspection
- 0.50 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- January 12, 2026
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 |
|---|---|---|---|---|
| 2025 | 1 | 0 | $151 | 0 |
Standards cited most at Portable #3
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 62.120 | Occupational noise exposure | 1 |
Other open mines in Sheridan County, Wyoming
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Tongue River Stone Inc | Tongue River Stone Inc | Sheridan County, WY | Crushed, broken stone | 3 | 32 |
| Wagner Spread 2 | Wagner Ranch Services, LLC | Sheridan County, WY | Construction sand and gravel | 4 | 8 |
| Portable Crusher 2 | Mullinax Inc | Sheridan County, WY | Construction sand and gravel | 2 | 5 |
| Wagner Spread 3 | Wagner Ranch Services, LLC | Sheridan County, WY | Construction sand and gravel | 1 | 2 |
| Brook Mine | Brook Mining Company, LLC | Sheridan County, WY | Coal (bituminous) | 5 | 0 |
| Youngs Creek Mine | Navajo Transitional Energy Company, LLC | Sheridan County, WY | Not stated | 0 | 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.