Data / Mines / Colorado / Penrose Ranch Gravel Pit
Penrose Ranch Gravel Pit: 12 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Penrose Ranch Gravel Pit is an active construction sand and gravel surface mine in Fremont County, Colorado, operated by Martin Marietta Materials, Inc. with 11 employees on MSHA's record (mine ID 0504509). Since January 1, 2022 MSHA inspectors issued 12 citations and orders there with $1,975 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Penrose Ranch Gravel Pit (MSHA mine ID 0504509) in Fremont County, Colorado: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0504509
- Status
- Active since October 1, 2016
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Fremont County, Colorado
- Nearest town
- Florence
- Operator
- Martin Marietta Materials, Inc.
- Parent company
- Martin Marietta Materials Inc
- Employees
- 11
- MSHA field office
- Denver CO Field Office
- Citations and orders since January 1, 2022
- 12
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 2
- Proposed penalties
- $1,975
- Amount paid so far
- $1,975
- Inspections
- 11
- Inspector hours on site
- 116
- Citations per inspection
- 1.09 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- June 5, 2026
- Citations issued to contractors here
- 4 ($604 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 |
|---|---|---|---|---|
| 2023 | 2 | 0 | $325 | 0 |
| 2024 | 4 | 0 | $702 | 0 |
| 2025 | 2 | 0 | $344 | 0 |
| 2026 | 4 | 0 | $604 | 0 |
Standards cited most at Penrose Ranch Gravel Pit
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 56.12004 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.5 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 1 |
| 30 CFR 45.4 | Part 45 | 1 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 1 |
Other open mines in Fremont County, Colorado
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Amrize Portland Plant | Holcim (US) Incorporated | Fremont County, CO | Cement | 175 | 644 |
| Portable Unit #1 | Colorado Quarries Inc | Fremont County, CO | Crushed, broken stone | 2 | 25 |
| Red Canyon Quarry | Martin Marietta Materials, Inc. | Fremont County, CO | Crushed, broken stone | 10 | 23 |
| Yevoli Cobblestone Pit | Yevoli Cobblestone Inc | Fremont County, CO | Construction sand and gravel | 1 | 17 |
| Langston Concrete Inc. | Langston Concrete Inc. | Fremont County, CO | Construction sand and gravel | 6 | 14 |
| Wash Plant 2 | Oldcastle SW Group, Inc. | Fremont County, CO | Construction sand and gravel | 2 | 13 |
| Portable Crusher #6 | Oldcastle SW Group, Inc. | Fremont County, CO | Construction sand and gravel | 6 | 8 |
| Portable Unit Extec | Super Ex., LLC | Fremont County, CO | Construction sand and gravel | 3 | 8 |
| Portable | Langston Concrete Inc. | Fremont County, CO | Construction sand and gravel | 6 | 7 |
| Kleemann Ms15z-Ad | Rocky Mountain Landscape Materials, LLC | Fremont County, CO | Construction sand and gravel | 2 | 3 |
| Portable Unit Eljay1140 | Super Ex., LLC | Fremont County, CO | Construction sand and gravel | 4 | 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.