Data / Mines / Indiana / Hamilton County
Mines in Hamilton County, Indiana: 10 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 10 open mines in Hamilton County, Indiana, run by 3 operators and employing 158 people. Since January 1, 2022 its inspectors issued 419 citations and orders there with $383,712 in proposed penalties, and operators reported 5 injury or illness cases. The operators with the most open mines are Martin Marietta Materials, Inc.; Imi Aggregates LLC; Beaver Gravel Corp. Data from MSHA, November 6, 2026.
The request: Get every open mine in Hamilton County, Indiana from MSHA with its operator, employees, and the operator's website, headquarters and size. $10 of work on sign-up, no card.
SpecStream is the live web data engine for teams and agents. It reads the mine, citation, inspection and accident files that MSHA publishes, and this page is that reading. Ask for the mines of a commodity, state or operator with the operator's headquarters, website and size added from the web, and new mines, new citations and new accident reports arrive in your sheet, CRM, Slack or agent as MSHA posts them.
- Open mines
- 10
- Operators
- 3
- Employees
- 158
- Active
- 7
- NonProducing
- 2
- New Mine
- 1
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 419
- Significant and substantial
- 131 (31.3%)
- Closure orders
- 6
- High negligence or reckless
- 29
- Proposed penalties
- $383,712
- Amount paid so far
- $267,136
- Inspections
- 161
- Inspector hours on site
- 2,021
- Citations per inspection
- 2.60 (all mines 2.30)
- Accident reports
- 7
- Injury and illness cases
- 5
- Fatalities
- 0
- Latest MSHA record
- November 2, 2026
Operators with the most open mines in Hamilton County, Indiana
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 Marietta Materials, Inc. | 5 | 98 | 296 | $306,777 | 3 |
| Imi Aggregates LLC | 2 | 38 | 88 | $61,129 | 1 |
| Beaver Gravel Corp | 2 | 22 | 35 | $15,806 | 1 |
Operators with the most citations in Hamilton County, Indiana
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Martin Marietta Materials, Inc. | 5 | 98 | 296 | $306,777 | 3 |
| Imi Aggregates LLC | 2 | 38 | 88 | $61,129 | 1 |
| Beaver Gravel Corp | 2 | 22 | 35 | $15,806 | 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 |
|---|---|---|---|---|---|
| North Indianapolis Quarry & Mill | Martin Marietta Materials, Inc. | Hamilton County, IN | Crushed, broken limestone | 42 | 138 |
| Noblesville Stone | Martin Marietta Materials, Inc. | Hamilton County, IN | Crushed, broken limestone | 35 | 87 |
| North Indianapolis Underground Quarry | Martin Marietta Materials, Inc. | Hamilton County, IN | Crushed, broken limestone | 1 | 56 |
| Fall Creek Sand & Gravel | Imi Aggregates LLC | Hamilton County, IN | Construction sand and gravel | 13 | 50 |
| Imi Stony Creek Stone Co | Imi Aggregates LLC | Hamilton County, IN | Crushed, broken limestone | 25 | 38 |
| Beaver Gravel Corporation | Beaver Gravel Corp | Hamilton County, IN | Construction sand and gravel | 20 | 32 |
| Noblesville Sand & Gravel | Martin Marietta Materials, Inc. | Hamilton County, IN | Construction sand and gravel | 12 | 8 |
| Carmel Sand & Gravel | Martin Marietta Materials, Inc. | Hamilton County, IN | Construction sand and gravel | 8 | 7 |
| Strawtown Eller Road | Beaver Gravel Corp | Hamilton County, IN | Crushed, broken limestone | 2 | 3 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Crushed, broken limestone | 5 | 50% |
| Construction sand and gravel | 4 | 40% |
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 | 77 | 25 | $28,898 | 2 |
| 2023 | 89 | 31 | $72,612 | 1 |
| 2024 | 171 | 46 | $225,021 | 0 |
| 2025 | 44 | 12 | $29,277 | 0 |
| 2026 | 38 | 17 | $27,904 | 2 |
Standards cited most at mines in Hamilton County, Indiana
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 56.20003 | Surface metal and nonmetal mines | 39 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 26 |
| 30 CFR 57.3200 | Underground metal and nonmetal mines | 25 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 22 |
| 30 CFR 57.14100 | Underground metal and nonmetal mines | 15 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 12 |
| 30 CFR 57.18002 | Underground metal and nonmetal mines | 12 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 8 |
| 30 CFR 57.20003 | Underground metal and nonmetal mines | 8 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 7 |
Injury and illness cases at mines in Hamilton County, Indiana
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 1 |
| Days away from work or restricted activity | 2 |
| No lost time, or an occupational illness | 2 |
What the accident reports at mines in Hamilton County, Indiana describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 1 |
| Inundation | 1 |
| Handling of materials | 1 |
| Powered haulage | 1 |
| Fire | 1 |
| Handtools (nonpowered) | 1 |
| Slip or fall of person | 1 |
Equipment named in accident reports at mines in Hamilton County, Indiana
| Equipment | Reports |
|---|---|
| Pneumatic blasting agent loader | 2 |
| Hand tools (powered) | 1 |
| Forklift | 1 |
| Hand tools (not powered) | 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.