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MSHA mine register by county

Mines in Knox County, Maine

Knox County, Maine has 47 mines on MSHA's register: 2 active, 14 intermittent, 27 abandoned. 224 accidents have been reported at these mines between 1983 and 2024. Inspectors have issued 2,412 citations.

Every mine MSHA has registered in Knox 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 Knox County →

Mines on register
47
Active
2
Fatalities on record
0
Citations issued
2,412
0 underground · 45 surface · 2 facilities 0 coal · 47 metal and non-metal 14 intermittent 27 abandoned 224 reported accidents, 1983–2024
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.
Knox County, Maine · Population 40,860
0.3%
Mining share of county employment
$71,903
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
Jake Barbour, Inc. 10 0 0
Dragon Products Company, Inc. 4 0 0
Maine Department Of Transportation 3 0 0
Eurovia Atlantic Coast LLC 2 0 0
Ferraiolo Construction Company Inc 2 0 0
Meklin Excavation 2 0 0
Pike Industries, Inc. 2 0 0
ARC AGGREGATES LLC 1 1 0
Arthur D Henry-Contractor 1 0 0
Chemrock Corp 1 0 0
Mines in Knox County47 on register
  1. HARD ROCK QUARRY
    Surface metal/non-metal · Peter Overlock Inc · MSHA ID 1700705
    Active
  2. Portable Plant
    Surface metal/non-metal · ARC AGGREGATES LLC · MSHA ID 1701093
    Active
  3. THOMASTON CEMENT PLANT
    Facility metal/non-metal · Dragon Products Company, Inc. · MSHA ID 1700022
    Abandoned
  4. Portable Pioneer Plant
    Surface metal/non-metal · Ferraiolo Construction · MSHA ID 1700584
    Intermittent
  5. Marriners, Inc.
    Surface metal/non-metal · Marriners, Inc. · MSHA ID 1700360
    Abandoned
  6. Pease Pit
    Surface metal/non-metal · Jake Barbour, Inc. · MSHA ID 1700285
    Temporarily Idled
  7. Liberty Pit Crusher
    Surface metal/non-metal · Ferraiolo Construction Company Inc · MSHA ID 1700504
    Abandoned
  8. Mills Excavation Inc.
    Surface metal/non-metal · Mills Excavation, Inc. · MSHA ID 1700696
    Intermittent
  9. Washington Pit #2
    Surface metal/non-metal · Jake Barbour, Inc. · MSHA ID 1700119
    Temporarily Idled
  10. Sukeforth Excavation & Trucking
    Surface metal/non-metal · Sukeforth Excavation & Trucking · MSHA ID 1701026
    Intermittent
  11. Cushing Pit
    Surface metal/non-metal · Meklin Excavation · MSHA ID 1700955
    Intermittent
  12. Washington Crusher
    Surface metal/non-metal · Eurovia Atlantic Coast LLC · MSHA ID 1700847
    Abandoned
  13. Pioneer Jaw Crusher & Metso Cone Crusher
    Surface metal/non-metal · Jake Barbour Inc · MSHA ID 1700805
    Intermittent
  14. Thomaston Pit
    Surface metal/non-metal · Meklin Excavation · MSHA ID 1700956
    Intermittent
  15. Hart Pit
    Surface metal/non-metal · Hartland, Inc. · MSHA ID 1700882
    Abandoned
  16. Astec GT165DF Mobile Screening Plant
    Surface metal/non-metal · Jake Barbour Inc · MSHA ID 1701003
    Intermittent
  17. Nordberg CV 100
    Surface metal/non-metal · Farley & Son, Inc. · MSHA ID 1700923
    Temporarily Idled
  18. Astec/KPI 205S
    Surface metal/non-metal · Jake Barbour Inc · MSHA ID 1700806
    Abandoned
  19. Tony Lash Excavation
    Surface metal/non-metal · Tony Lash Excavation · MSHA ID 1701030
    Intermittent
  20. JBI - Crushing / Screening
    Surface metal/non-metal · Jake Barbour Inc · MSHA ID 1700801
    Abandoned
  21. OE-15 Extec Screener
    Surface metal/non-metal · Jake Barbour Inc · MSHA ID 1700804
    Abandoned
  22. Portable 3
    Surface metal/non-metal · Dragon Products Company · MSHA ID 1700590
    Abandoned
  23. Thomaston Mill
    Facility metal/non-metal · Chemrock Corp · MSHA ID 1700561
    Abandoned
  24. Pike Washington
    Surface metal/non-metal · Pike Industries, Inc. · MSHA ID 1700925
    Intermittent
  25. Crusher C654
    Surface metal/non-metal · Pike Industries · MSHA ID 1701036
    Intermittent
  26. 341 Rock Quarry
    Surface metal/non-metal · Wilson Construction & Landscaping Inc · MSHA ID 1701146
    Intermittent
  27. Washington Quarry
    Surface metal/non-metal · Eurovia Atlantic Coast LLC · MSHA ID 1700845
    Abandoned
  28. Astec GT165
    Surface metal/non-metal · Jake Barbour Inc. · MSHA ID 1701103
    Intermittent
  29. Powerscreen Premiertrak 400X
    Surface metal/non-metal · Jake Barbour, Inc. · MSHA ID 1701129
    Intermittent
  30. Cedarapids CRC1150S
    Surface metal/non-metal · Jake Barbour, Inc. · MSHA ID 1701128
    Intermittent
  31. FOX ISLAND QUARRY
    Surface metal/non-metal · FOX ISLAND GRANITE CO. INC. · MSHA ID 1700729
    Abandoned
  32. Appletton Pit
    Surface metal/non-metal · H A Conary · MSHA ID 1700406
    Abandoned
  33. Davis Pit
    Surface metal/non-metal · John J Borzoni · MSHA ID 1700453
    Abandoned
  34. Division 5 Portable Unit
    Surface metal/non-metal · Maine Department Of Transportation · MSHA ID 1700355
    Abandoned
  35. Foley Pit
    Surface metal/non-metal · Maine Department Of Transportation · MSHA ID 1700364
    Abandoned
  36. Foley Pit
    Surface metal/non-metal · Earle Doc Maxcy · MSHA ID 1700516
    Abandoned
  37. HERITAGE VALLEY QUARRY
    Surface metal/non-metal · J.C. STONE INC. · MSHA ID 1700850
    Abandoned
  38. Metso Cone Crusher LT200HP
    Surface metal/non-metal · Jake Barbour Inc · MSHA ID 1701019
    Abandoned
  39. Portable 1
    Surface metal/non-metal · Dragon Products Company · MSHA ID 1700431
    Abandoned
  40. Portable Screen No 55-720
    Surface metal/non-metal · Starr Brothers Inc · MSHA ID 1700251
    Abandoned
  41. Quarry- 2
    Surface metal/non-metal · Hagar Enterprises Inc · MSHA ID 1701145
    Temporarily Idled
  42. Ranta Pit And Mill
    Surface metal/non-metal · Maine Department Of Transportation · MSHA ID 1700365
    Abandoned
  43. Thomaston Quarry
    Surface metal/non-metal · Martin Marietta Corp · MSHA ID 1700499
    Abandoned
  44. Thomaston Quarry And Mill
    Surface metal/non-metal · Marine Trading & Transportation I · MSHA ID 1700026
    Abandoned
  45. Union Plant
    Surface metal/non-metal · Dragon Products Company · MSHA ID 1700007
    Abandoned
  46. Warren Pit
    Surface metal/non-metal · Arthur D Henry-Contractor · MSHA ID 1700391
    Abandoned
  47. Washington
    Surface metal/non-metal · J.C. Stone, Inc. · MSHA ID 1700950
    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 MaineAll 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.