Mining Incidents
Search Operators Mines Alerts Research Controllers Fatalgrams About
Countries
Peru Chile
English Español
States › Ohio
MSHA mine register by county

Mines in Seneca County, Ohio

Seneca County, Ohio has 10 mines on MSHA's register: 5 active, 1 intermittent, 4 abandoned. 1 miner has died and 174 accidents have been reported at these mines between 1987 and 2024. Inspectors have issued 1,094 citations.

Every mine MSHA has registered in Seneca County, working or not, with the accident, fatality and citation record each one carries on this site. Active mines are listed first, then the rest by the weight of their record.

Abandoned and historical mine features in Seneca County →

Mines on register
10
Active
5
Fatalities on record
1
Citations issued
1,094
0 underground · 8 surface · 2 facilities 0 coal · 10 metal and non-metal 1 intermittent 4 abandoned 174 reported accidents, 1987–2024
Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Seneca County, Ohio · Population 54,861
0.1%
Mining share of county employment
$65,020
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
On the map 
Loading map…
MSHA-registered mine, any status

Mines plot only where MSHA holds a surveyed coordinate for the site; mines the agency locates to a town, county or state centroid are in the counts and the list above but not drawn. Click a point for the mine's status and record.

Operators with the most mines herecurrent operator of record
Operator Mines Active Fatalities
MGQ, Inc. 2 1 1
Heidelberg Materials Midwest Agg, Inc. 2 1 0
Western Ohio Cut Stone LLC 2 2 0
Carmeuse Lime Inc 1 1 0
Heitsche North Shore Stone Quarry LLC 1 0 0
J A Miller Tile Company 1 0 0
Melco Inc. 1 0 0
Mines in Seneca County10 on register
  1. Maple Grove Operations
    Facility metal/non-metal · Carmeuse Lime Inc · MSHA ID 3300013
    Active
  2. MGQ Inc
    Surface metal/non-metal · MGQ Inc · MSHA ID 3304407
    Active
  3. Bloomville Stone Quarry
    Surface metal/non-metal · Heidelberg Materials Midwest Agg, Inc. · MSHA ID 3300066
    Active
  4. FLAT ROCK QUARRY
    Surface metal/non-metal · Western Ohio Cut Stone LLC · MSHA ID 3304375
    Active
  5. Bloomville Quarry
    Surface metal/non-metal · Western Ohio Cut Stone LLC · MSHA ID 3304359
    Active
  6. Millersville Quarry
    Surface metal/non-metal · MGQ, Inc. · MSHA ID 3304511
    Abandoned
  7. Flat Rock Stone Quarry
    Surface metal/non-metal · Hanson Aggregates Midwest, LLC · MSHA ID 3300118
    Abandoned
  8. Heitsche North Shore Stone Quarry LLC
    Surface metal/non-metal · Heitsche North Shore Stone Quarry LLC · MSHA ID 3300357
    Intermittent
  9. Hazemag Crusher
    Facility metal/non-metal · Melco Inc. · MSHA ID 3304510
    Abandoned
  10. J A Miller Tile Co Pit & Plant
    Surface metal/non-metal · J A Miller Tile Company · MSHA ID 3300555
    Abandoned

Status, type and operator are as reported to MSHA. Fatality and accident counts are MSHA's reportable accident records for the mine; citations are inspector-issued violations on record. Each mine's own page carries the full detail.

Other counties in OhioAll counties →
How to read these numbers

The register is MSHA's Mine Data Retrieval System: every operation ever assigned a mine ID, including ones abandoned decades ago, so the count is a history of mining in the county, not a count of working mines. A mine's county is the one its operator reported to MSHA. Fatality and accident counts start with MSHA's reportable-accident records (1983 onward); citation counts are inspector-issued violations on record. We are an independent research tool, not MSHA.