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MSHA mine register by county

Mines in Clay County, Missouri

Clay County, Missouri has 19 mines on MSHA's register: 5 active, 2 intermittent, 11 abandoned. 2 miners have died and 224 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,124 citations.

Every mine MSHA has registered in Clay 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 Clay County →

Mines on register
19
Active
5
Fatalities on record
2
Citations issued
1,124
6 underground · 12 surface · 0 facilities 0 coal · 19 metal and non-metal 2 intermittent 11 abandoned 224 reported accidents, 1983–2026
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.
Clay County, Missouri · Population 255,566
0.2%
Mining share of county employment
$86,150
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
On the map 
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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
Holliday Sand & Gravel 3 1 1
Martin Marietta Kansas City, LLC 2 1 1
Holliday Sand & Gravel Company 2 0 0
Hunt Midwest Mining Inc 2 0 0
Missouri Rock Inc 2 0 0
Capital Sand Company, Inc. 1 1 0
Clay County Highway Department 1 0 0
Clay County Materials LLC 1 0 0
Everett Quarries Company Inc 1 0 0
Ideker Mining LLC 1 1 0
Mines in Clay County19 on register
  1. Randolph Plant #9
    Surface metal/non-metal · Holliday Sand & Gravel · MSHA ID 2300695
    Active
  2. Randolph Deep Mine
    Underground metal/non-metal · Martin Marietta Kansas City, LLC · MSHA ID 2302308
    Active
  3. Liberty Aggregates LLC
    Underground metal/non-metal · Liberty Aggregates LLC · MSHA ID 2302513
    Active
  4. Mosby Quarry
    Underground metal/non-metal · Ideker Mining LLC · MSHA ID 2302447
    Active
  5. Plant #22 Missouri City
    Surface metal/non-metal · Capital Sand Company, Inc. · MSHA ID 2302562
    Active
  6. Randolph Mine
    Underground metal/non-metal · Hunt Martin Materials L.L.C. · MSHA ID 2300154
    Abandoned
  7. Clay County Materials
    Surface metal/non-metal · Clay County Materials LLC · MSHA ID 2302407
    Intermittent
  8. LIBERTY BEND PLANT #12
    Surface metal/non-metal · Holliday Sand & Gravel Company · MSHA ID 2301276
    Abandoned
  9. Missouri Rock Inc
    Surface metal/non-metal · Missouri Rock Inc · MSHA ID 2301670
    Abandoned
  10. MISSOURI PORTABLE PLT #1
    Surface metal/non-metal · Hunt Midwest Mining Inc · MSHA ID 2302169
    Abandoned
  11. MO PORTABLE #2
    Surface metal/non-metal · Hunt Midwest Mining Inc · MSHA ID 2300208
    Abandoned
  12. Randolph Dredge
    Surface metal/non-metal · Holliday Sand & Gravel · MSHA ID 2302508
    Intermittent
  13. Riverside Dredge
    Surface metal/non-metal · Holliday Sand & Gravel · MSHA ID 2302509
    Abandoned
  14. Park Bend Company
    Surface metal/non-metal · Park Bend Company · MSHA ID 2300774
    Abandoned
  15. MISSOURI ROCK INC.
    Underground metal/non-metal · Missouri Rock Inc · MSHA ID 2301981
    Abandoned
  16. Clay
    metal/non-metal · Superior Aggregates · MSHA ID 2302609
    New Mine
  17. Clay County Mine And Mill
    Underground metal/non-metal · Clay County Highway Department · MSHA ID 2300033
    Abandoned
  18. Everett Quarry No 5
    Surface metal/non-metal · Everett Quarries Company Inc · MSHA ID 2300058
    Abandoned
  19. Plant #15
    Surface metal/non-metal · Holliday Sand & Gravel Company · MSHA ID 2302006
    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 MissouriAll 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.