Data / Mines / Kansas / Sedgwick County
Mines in Sedgwick County, Kansas: 9 open mines
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 Sedgwick County, Kansas, run by 7 operators and employing 47 people. Since January 1, 2022 its inspectors issued 168 citations and orders there with $59,374 in proposed penalties, and operators reported 3 injury or illness cases. The operators with the most open mines are Martin Central Sand Company Inc; Cornejo & Sons LLC; Air Capitol Materials. Data from MSHA, November 6, 2026.
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- Open mines
- 9
- Operators
- 7
- Employees
- 47
- Active
- 7
- Intermittent
- 1
- New Mine
- 1
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 168
- Significant and substantial
- 18 (10.7%)
- Closure orders
- 3
- High negligence or reckless
- 11
- Proposed penalties
- $59,374
- Amount paid so far
- $46,619
- Inspections
- 92
- Inspector hours on site
- 507
- Citations per inspection
- 1.83 (all mines 2.30)
- Accident reports
- 3
- Injury and illness cases
- 3
- Fatalities
- 0
- Latest MSHA record
- August 27, 2026
Operators with the most open mines in Sedgwick County, Kansas
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 |
|---|---|---|---|---|---|
| Martin Central Sand Company Inc | 2 | 12 | 28 | $4,916 | 0 |
| Cornejo & Sons LLC | 1 | 10 | 44 | $21,433 | 2 |
| Air Capitol Materials | 1 | 7 | 28 | $8,609 | 0 |
| Mid-States Sand LLC | 1 | 3 | 25 | $14,787 | 0 |
| Northridge Sand LLC | 1 | 8 | 22 | $4,823 | 0 |
| Aggregate Sand & Gravel Inc. | 1 | 3 | 17 | $3,645 | 0 |
| Associated Material & Supply Co Inc | 1 | 4 | 4 | $1,161 | 1 |
Operators with the most citations in Sedgwick County, Kansas
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Cornejo & Sons LLC | 1 | 10 | 44 | $21,433 | 2 |
| Martin Central Sand Company Inc | 2 | 12 | 28 | $4,916 | 0 |
| Air Capitol Materials | 1 | 7 | 28 | $8,609 | 0 |
| Mid-States Sand LLC | 1 | 3 | 25 | $14,787 | 0 |
| Northridge Sand LLC | 1 | 8 | 22 | $4,823 | 0 |
| Aggregate Sand & Gravel Inc. | 1 | 3 | 17 | $3,645 | 0 |
| Associated Material & Supply Co Inc | 1 | 4 | 4 | $1,161 | 1 |
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 |
|---|---|---|---|---|---|
| Wichita Sand and Gravel | Cornejo & Sons LLC | Sedgwick County, KS | Construction sand and gravel | 10 | 44 |
| Air Capitol Materials | Air Capitol Materials | Sedgwick County, KS | Construction sand and gravel | 7 | 28 |
| Central Sand Hoover/ Plant 4 | Martin Central Sand Company Inc | Sedgwick County, KS | Construction sand and gravel | 7 | 25 |
| Mid-States Sand LLC | Mid-States Sand LLC | Sedgwick County, KS | Construction sand and gravel | 3 | 25 |
| Northridge Sand LLC | Northridge Sand LLC | Sedgwick County, KS | Construction sand and gravel | 8 | 22 |
| Aggregate Sand & Gravel Inc. | Aggregate Sand & Gravel Inc. | Sedgwick County, KS | Construction sand and gravel | 3 | 17 |
| Plant II | Associated Material & Supply Co Inc | Sedgwick County, KS | Construction sand and gravel | 4 | 4 |
| Woodard Quarry | Martin Central Sand Company Inc | Sedgwick County, KS | Construction sand and gravel | 5 | 3 |
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 | 22 | 6 | $5,826 | 2 |
| 2023 | 26 | 2 | $5,300 | 1 |
| 2024 | 15 | 2 | $2,501 | 0 |
| 2025 | 42 | 5 | $7,629 | 0 |
| 2026 | 63 | 3 | $38,118 | 0 |
Standards cited most at mines in Sedgwick County, Kansas
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 56.14100 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.4102 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.15001 | Surface metal and nonmetal mines | 5 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 5 |
| 30 CFR 56.4601 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 4 |
Injury and illness cases at mines in Sedgwick County, Kansas
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 3 |
What the accident reports at mines in Sedgwick County, Kansas describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handtools (nonpowered) | 2 |
| Handling of materials | 1 |
Equipment named in accident reports at mines in Sedgwick County, Kansas
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 2 |
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.