Data / Mines / Colorado / Masonville Quarry
Masonville Quarry: 16 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Masonville Quarry is an active dimension stone surface mine in Larimer County, Colorado, operated by Masonville Stone Company with 3 employees on MSHA's record (mine ID 0504013). Since January 1, 2022 MSHA inspectors issued 16 citations and orders there with $4,054 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Masonville Quarry (MSHA mine ID 0504013) in Larimer County, Colorado: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0504013
- Status
- Active since October 1, 2019
- Main commodity
- Dimension stone
- Mine type
- Surface
- County
- Larimer County, Colorado
- Nearest town
- Masonville
- Operator
- Masonville Stone Company
- Employees
- 3
- MSHA field office
- Denver CO Field Office
- Citations and orders since January 1, 2022
- 16
- Significant and substantial
- 3 (18.8%)
- Closure orders
- 1
- High negligence or reckless
- 5
- Proposed penalties
- $4,054
- Amount paid so far
- $4,054
- Inspections
- 14
- Inspector hours on site
- 82
- Citations per inspection
- 1.14 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- May 11, 2026
- Citations issued to contractors here
- 5 ($747 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 | 4 | 0 | $696 | 0 |
| 2023 | 2 | 0 | $375 | 0 |
| 2024 | 4 | 0 | $596 | 0 |
| 2025 | 1 | 0 | $151 | 0 |
| 2026 | 5 | 3 | $2,236 | 0 |
Standards cited most at Masonville Quarry
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 56.14132 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.20002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.3131 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.15002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.15003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14205 | Surface metal and nonmetal mines | 1 |
Other open mines in Larimer County, Colorado
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Owl Canyon Quarry & Mill | Colorado Lien Company | Larimer County, CO | Dimension limestone | 25 | 54 |
| Stone Wholesale Brownstone Quarry | Stone Wholesale, Inc. | Larimer County, CO | Dimension stone | 12 | 45 |
| Trupp Loveland | Arkins Park Stone Corp | Larimer County, CO | Dimension sandstone | 24 | 41 |
| Loveland Ready-Mix Concrete Inc Sand and | Loveland Ready Mix Concrete Inc | Larimer County, CO | Construction sand and gravel | 2 | 31 |
| Rocky Road Quarry | Colorado Flagstone Inc | Larimer County, CO | Dimension sandstone | 7 | 30 |
| Sprague Stone LLC | Sprague Stone LLC | Larimer County, CO | Dimension sandstone | 11 | 20 |
| Meadow Hollow Quarry | Colorado Quarry 1, LLC | Larimer County, CO | Dimension stone | 8 | 19 |
| Coulson Portable | Coulson Excavating Company Inc | Larimer County, CO | Construction sand and gravel | 5 | 14 |
| Portable #1 Fort Collins | Simon Contractors | Larimer County, CO | Construction sand and gravel | 5 | 14 |
| Heitf Pit | Mill Iron Mining | Larimer County, CO | Construction sand and gravel | 1 | 13 |
| Portable Crusher | Larimer County Road & Bridge Department | Larimer County, CO | Construction sand and gravel | 3 | 11 |
| Loudwire Quarry | Loudwire Diesel LLC | Larimer County, CO | Construction sand and gravel | 2 | 11 |
| Knox Pit | Loveland Ready Mix Concrete Inc | Larimer County, CO | Construction sand and gravel | 2 | 10 |
| Weaver Quarry | Loukonen Brothers Stone | Larimer County, CO | Dimension sandstone | 1 | 10 |
| Glacier Rock Pit | Glacier Rock Company | Larimer County, CO | Construction sand and gravel | 1 | 10 |
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.