Mines in Delaware: 9 open mines and MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 9 open mines in Delaware, run by 6 operators and employing 76 people. Since January 1, 2022 its inspectors issued 137 citations and orders there with $40,785 in proposed penalties, and operators reported 9 injury or illness cases. The operators with the most open mines are M L Joseph Sand & Gravel Company Inc; Pennsy Supply Inc; Vulcan Construction Materials, LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 9
- Operators
- 6
- Employees
- 76
- Active
- 8
- Intermittent
- 1
- Citations and orders since January 1, 2022
- 137
- Significant and substantial
- 27 (19.7%)
- Closure orders
- 6
- High negligence or reckless
- 7
- Proposed penalties
- $40,785
- Amount paid so far
- $39,716
- Inspections
- 113
- Inspector hours on site
- 872
- Citations per inspection
- 1.21 (all mines 2.30)
- Accident reports
- 10
- Injury and illness cases
- 9
- Fatalities
- 0
- Latest MSHA record
- July 20, 2026
Operators with the most open mines in Delaware
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 |
|---|---|---|---|---|---|
| M L Joseph Sand & Gravel Company Inc | 2 | 17 | 20 | $2,917 | 2 |
| Pennsy Supply Inc | 2 | 8 | 9 | $1,339 | 2 |
| Vulcan Construction Materials, LLC | 2 | 19 | 5 | $754 | 4 |
| Vibrantz Minerals LLC | 1 | 27 | 73 | $29,239 | 0 |
| Sustainable Land Use, LLC | 1 | 3 | 18 | $4,335 | 1 |
| Porters Sand & Gravel | 1 | 2 | 12 | $2,201 | 0 |
Operators with the most citations in Delaware
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Vibrantz Minerals LLC | 1 | 27 | 73 | $29,239 | 0 |
| M L Joseph Sand & Gravel Company Inc | 2 | 17 | 20 | $2,917 | 2 |
| Sustainable Land Use, LLC | 1 | 3 | 18 | $4,335 | 1 |
| Porters Sand & Gravel | 1 | 2 | 12 | $2,201 | 0 |
| Pennsy Supply Inc | 2 | 8 | 9 | $1,339 | 2 |
| Vulcan Construction Materials, LLC | 2 | 19 | 5 | $754 | 4 |
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 |
|---|---|---|---|---|---|
| Wilmington Plant | Vibrantz Minerals LLC | New Castle County, DE | Manganese ore | 27 | 73 |
| Seaford-De Sand & Gravel | Sustainable Land Use, LLC | Sussex County, DE | Construction sand and gravel | 3 | 18 |
| M L Joseph Sand & Gravel Company Inc | M L Joseph Sand & Gravel Company Inc | Sussex County, DE | Construction sand and gravel | 9 | 15 |
| Porter Sand & Gravel, Inc. | Porters Sand & Gravel | Kent County, DE | Sand, industrial | 2 | 12 |
| Tarburton Pit | Pennsy Supply Inc | Kent County, DE | Construction sand and gravel | 6 | 7 |
| Wolman | Vulcan Construction Materials, LLC | Sussex County, DE | Sand, industrial | 10 | 5 |
| Plant #2 | M L Joseph Sand & Gravel Company Inc | Sussex County, DE | Sand, common | 8 | 5 |
| Bay Road Plant #7 | Pennsy Supply Inc | Kent County, DE | Construction sand and gravel | 2 | 2 |
| Laurel Sand Plant | Vulcan Construction Materials, LLC | Sussex County, DE | Construction sand and gravel | 9 | 0 |
Counties
| County | Open mines |
|---|---|
| Sussex County | 5 |
| Kent County | 3 |
| New Castle County | 1 |
Mines by kind
| Kind | Open mines |
|---|---|
| Sand and gravel | 6 |
| Nonmetal | 2 |
| Metal | 1 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 5 | 55.6% |
| Sand, industrial | 2 | 22.2% |
| Manganese ore | 1 | 11.1% |
| Sand, common | 1 | 11.1% |
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 | 31 | 4 | $6,414 | 4 |
| 2023 | 22 | 3 | $3,691 | 2 |
| 2024 | 29 | 2 | $6,207 | 2 |
| 2025 | 27 | 8 | $9,358 | 1 |
| 2026 | 28 | 10 | $15,115 | 0 |
Standards cited most at mines in Delaware
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 56.14112 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 7 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 7 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 4 |
| 30 CFR 41.12 | Notice of legal identity | 4 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 2 |
Injury and illness cases at mines in Delaware
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 8 |
| No lost time, or an occupational illness | 1 |
What the accident reports at mines in Delaware describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 4 |
| Slip or fall of person | 4 |
| Machinery | 1 |
| Handtools (nonpowered) | 1 |
Equipment named in accident reports at mines in Delaware
| Equipment | Reports |
|---|---|
| Hand tools (powered) | 1 |
| Front-end loader | 1 |
| Hand tools (not powered) | 1 |
| Ore haulage trucks - on highway trucks | 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.