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MSHA mine register by county

Mines in King County, Washington

King County, Washington has 164 mines on MSHA's register: 16 active, 2 intermittent, 145 abandoned. 4 are coal mines and 160 metal or non-metal. 1 miner has died and 1,188 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 5,343 citations.

Every mine MSHA has registered in King 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 King County →

Mines on register
164
Active
16
Fatalities on record
1
Citations issued
5,343
4 underground · 155 surface · 5 facilities 4 coal · 160 metal and non-metal 2 intermittent 145 abandoned 1,188 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.
King County, Washington · Population 2,262,713
0.0%
Mining share of county employment
$122,148
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
King County Department Of Public Works 14 0 0
City Of Seattle Water Shed 10 0 0
HM Pacific Northwest, Inc. 5 3 0
CalPortland Company 4 3 0
City Transfer Inc 3 0 0
Jensen Sand & Gravel Inc 3 1 0
Kangley Sand & Gravel 3 0 0
Lakeside Industries, Inc. 3 2 0
M A Segale Inc 3 0 0
Mutual Materials Company 3 0 0
Mines in King County164 on register
  1. Seattle Plant
    Facility metal/non-metal · Ash Grove Cement Company · MSHA ID 4500359
    Active
  2. Auburn Facility
    Surface metal/non-metal · ICON Materials · MSHA ID 4501237
    Active
  3. Snoqualmie S&G dba CalPortland Company
    Surface metal/non-metal · CalPortland Company · MSHA ID 4503136
    Active
  4. Issaquah Pit & Plant
    Surface metal/non-metal · Lakeside Industries, Inc · MSHA ID 4500652
    Active
  5. Enumclaw Pit & Plant
    Surface metal/non-metal · HM Pacific Northwest Inc. · MSHA ID 4500609
    Active
  6. Arcosa Specialty Materials Seattle #1890
    Facility metal/non-metal · Arcosa Specialty Materials · MSHA ID 4503239
    Active
  7. Franklin Ridge Sand & Gravel
    Surface metal/non-metal · Green Section 30 LLC · MSHA ID 4503415
    Active
  8. White River Quarry
    Surface metal/non-metal · CalPortland Company · MSHA ID 4503374
    Active
  9. Ryterra LLC
    Surface metal/non-metal · Ryterra · MSHA ID 4503172
    Active
  10. VASHON SAND AND GRAVEL dba CalPortland
    Surface metal/non-metal · CalPortland Company · MSHA ID 4501707
    Active
  11. North Bend
    Surface metal/non-metal · HM Pacific Northwest, Inc. · MSHA ID 4503547
    Active
  12. Thunder Mountain Quarry
    Surface metal/non-metal · HM Pacific Northwest, Inc. · MSHA ID 4501127
    Active
  13. PALMER JUNCTION GRAVEL PIT-KANASKAT PIT
    Surface metal/non-metal · Lakeside Industries, Inc. · MSHA ID 4502825
    Active
  14. Jensen Portable Screens
    Surface metal/non-metal · Jensen Sand & Gravel · MSHA ID 4501207
    Active
  15. Plant D
    Surface metal/non-metal · Rock Services Inc. · MSHA ID 4503790
    Active
  16. Portable 1
    Surface metal/non-metal · Severson Road Contractors · MSHA ID 4503808
    Active
  17. Seattle Plant
    Facility metal/non-metal · Lafarge North America Inc · MSHA ID 4500805
    Abandoned
  18. RESERVE SILICA CORPORATION
    Surface metal/non-metal · Reserve Silica Corp · MSHA ID 4500823
    Abandoned
  19. John Henry No 1 Mine
    Surface coal · Pacific Coast Coal Company · MSHA ID 4502967
    Abandoned
  20. Kangley Pit
    Surface metal/non-metal · Kangley Sand & Gravel · MSHA ID 4501994
    Intermittent
  21. Cadman (Redmond)
    Surface metal/non-metal · HM Pacific Northwest, Inc. · MSHA ID 4500585
    Abandoned
  22. Black River Quarry
    Surface metal/non-metal · Stoneway Rock & Recycling · MSHA ID 4503180
    Abandoned
  23. Lake Frances Pit
    Surface metal/non-metal · Kangley Rock & Recycling · MSHA ID 4503489
    Abandoned
  24. Cadman Black Diamond
    Surface metal/non-metal · HM Pacific Northwest, Inc. · MSHA ID 4501227
    Abandoned
  25. Puget Sound Surfacers Inc G6
    Surface metal/non-metal · Puget Sound Surfacers Inc · MSHA ID 4503398
    Abandoned
  26. MORGAN KAME TERRACE
    Surface metal/non-metal · Palmer Coking Coal Company LLP · MSHA ID 4503338
    Abandoned
  27. Milton Pit
    Surface metal/non-metal · Lloyd Enterprises, Inc. · MSHA ID 4503069
    Abandoned
  28. Miles Sand & Gravel
    Surface metal/non-metal · Miles Sand & Gravel · MSHA ID 4500662
    Abandoned
  29. Black River Pit
    Surface metal/non-metal · Lakeside Industries, Inc · MSHA ID 4501582
    Abandoned
  30. Mt Si Quarry
    Surface metal/non-metal · Mt Si Quarry SMM · MSHA ID 4502189
    Abandoned
  31. Manufacturers Mineral Co. Renton Plant
    Surface metal/non-metal · Manufacturers Mineral Company · MSHA ID 4503315
    Temporarily Idled
  32. HAYES SAND & GRAVEL LLC
    Surface metal/non-metal · Hayes Sand & Gravel Llc · MSHA ID 4503369
    Abandoned
  33. Mckay-Section 12 Surface Coal Mine
    Surface coal · Palmer Coking Coal Company · MSHA ID 4502150
    Abandoned and Sealed
  34. Raging River Quarry
    Surface metal/non-metal · May Valley Sand & Gravel LLC · MSHA ID 4502195
    Abandoned
  35. Cedar Mountain Pit
    Surface metal/non-metal · Rivera & Green Inc · MSHA ID 4502212
    Abandoned
  36. Maltby Sand & Gravel
    Surface metal/non-metal · Maltby Sand & Gravel · MSHA ID 4500583
    Abandoned
  37. Maury Island Sand & Grav dba CalPortland
    Surface metal/non-metal · CalPortland Company · MSHA ID 4502526
    Abandoned
  38. Tanner Falls
    Surface metal/non-metal · Fury Site Works Inc · MSHA ID 4503732
    Abandoned
  39. HOMESTEAD GRAVEL PIT
    Surface metal/non-metal · Fiorito Brothers Inc · MSHA ID 4502131
    Abandoned
  40. 3 Lakes Quarry
    Surface metal/non-metal · GDN Enterprises, Inc · MSHA ID 4503566
    Abandoned
  41. PORTABLE CRUSHER JESAB
    Surface metal/non-metal · Jensen Sand & Gravel Inc · MSHA ID 4503432
    Abandoned
  42. Kangley Plant
    Surface metal/non-metal · City Transfer Inc · MSHA ID 4503380
    Abandoned
  43. Portable Screen Chieftain
    Surface metal/non-metal · Jensen Sand & Gravel Inc · MSHA ID 4503431
    Abandoned
  44. Damon Mill
    Facility metal/non-metal · C S S Management · MSHA ID 4502962
    Abandoned
  45. Granite Products LLC
    Surface metal/non-metal · Granite Products LLC · MSHA ID 4503567
    Abandoned
  46. Horizon Sand & Gravel
    Surface metal/non-metal · Horizon Sand & Gravel · MSHA ID 4502757
    Abandoned
  47. LAKELAND HILLS PIT
    Surface metal/non-metal · Northwest Aggregates · MSHA ID 4503318
    Abandoned
  48. PLANT 2704
    Surface metal/non-metal · M A Segale Inc · MSHA ID 4503047
    Abandoned
  49. PORTABLE PLANT
    Surface metal/non-metal · MATERIAL PROCESSING INC · MSHA ID 4503580
    Abandoned
  50. Powerscreen
    Surface metal/non-metal · Santana Trucking & Excavating Inc · MSHA ID 4503026
    Abandoned
  51. SCREEN PLANT #1
    Surface metal/non-metal · Summit Inc · MSHA ID 4503400
    Abandoned
  52. Section 31 Pit
    Surface metal/non-metal · Stowe Construction Inc · MSHA ID 4503065
    Abandoned
  53. Southworth Portable Crusher
    Surface metal/non-metal · Southworth & Sons Inc · MSHA ID 4501586
    Abandoned
  54. Tri-State Portable Plant
    Surface metal/non-metal · Tri-State Construction Inc · MSHA ID 4503097
    Abandoned
  55. GH Rock Products
    Surface metal/non-metal · Crown Lakes LLC · MSHA ID 4503616
    Abandoned
  56. Bremmeyer
    Surface metal/non-metal · Bremmeyer Logging · MSHA ID 4503506
    Abandoned
  57. Elk Heights Pit
    Surface metal/non-metal · KLB Construction LLC · MSHA ID 4503797
    Intermittent
  58. GH Rock Products Talus Slope Mine
    Surface metal/non-metal · Wisdom Earthworks Inc. · MSHA ID 4503609
    Abandoned
  59. Portable #1
    Surface metal/non-metal · D & R Excavating Inc · MSHA ID 4503516
    Abandoned
  60. Elk Pit
    Surface metal/non-metal · Mutual Materials Company · MSHA ID 4500256
    Abandoned
  61. Section 31 Mine
    Surface metal/non-metal · Mutual Materials Company · MSHA ID 4501052
    Abandoned
  62. 155 5
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502134
    Abandoned
  63. 211 2-No 1 Quarry
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4501955
    Abandoned
  64. 211 2-No 2 Quarry
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4501961
    Abandoned
  65. 640 Road Pit
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502115
    Abandoned
  66. 700 Road Vista Pit
    Surface metal/non-metal · Olson & Taylor Inc · MSHA ID 4502118
    Abandoned
  67. 700-780 Junction Pit
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502119
    Abandoned
  68. A-400 Pit
    Surface metal/non-metal · Associated Sand & Gravel Company Inc · MSHA ID 4502129
    Abandoned
  69. American Pit And Plant
    Surface metal/non-metal · American Concrete Inc · MSHA ID 4501109
    Abandoned
  70. Bear Crushing One
    Surface metal/non-metal · Bear Crushing Inc · MSHA ID 4503075
    Abandoned
  71. Beckler River Pit
    Surface metal/non-metal · Aurora Equipment Inc · MSHA ID 4502811
    Abandoned
  72. Ben Jones
    Surface metal/non-metal · Cadman (Rock) Inc · MSHA ID 4503077
    Abandoned
  73. Blum Clay Mine
    Surface metal/non-metal · Moulden & Sons' Inc · MSHA ID 4500250
    Abandoned
  74. Bpa 31 Pit
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502060
    Abandoned
  75. Bremmeyer Pit
    Surface metal/non-metal · Bremmeyer Excavating Inc · MSHA ID 4502832
    Abandoned
  76. Brick Road Pit And Plant
    Surface metal/non-metal · Hos Brothers Bulldozing Inc · MSHA ID 4501357
    Abandoned
  77. Cadman Pit And Screening Plant
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4500520
    Abandoned
  78. Camp Brown Quarry
    Surface metal/non-metal · U S Forest Service · MSHA ID 4501960
    Abandoned
  79. Canton Creek Quarry
    Surface metal/non-metal · Montgomery-Nordhougen Inc · MSHA ID 4502851
    Abandoned
  80. Cascade Pit
    Surface metal/non-metal · Cascade Sand & Gravel · MSHA ID 4502678
    Abandoned
  81. Churchill Pit
    Surface metal/non-metal · Churchill Sand & Gravel Co · MSHA ID 4500731
    Abandoned
  82. City Dump Gravel Pit
    Surface metal/non-metal · City Of Enumclaw-Wa · MSHA ID 4501166
    Abandoned
  83. Coal Creek Pit & Plant
    Surface metal/non-metal · C Martin Trucking Inc · MSHA ID 4502732
    Abandoned
  84. Corliss Fikse Pit
    Surface metal/non-metal · Corliss Company · MSHA ID 4501215
    Abandoned
  85. Covington Pit
    Surface metal/non-metal · Iddings Inc · MSHA ID 4501491
    Abandoned
  86. Covington Pit - Division #9
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501200
    Abandoned
  87. Crabtree Pit
    Surface metal/non-metal · Mid-Island Rock Products Inc · MSHA ID 4502804
    Abandoned
  88. Damon Mine
    Underground metal/non-metal · C S S Management · MSHA ID 4502843
    Abandoned
  89. Diamond Pit - Div 9
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502299
    Abandoned
  90. Dumor Pit
    Surface metal/non-metal · Dumor Sand & Gravel · MSHA ID 4503150
    Abandoned
  91. E-Z Dozing Portable Crusher
    Surface metal/non-metal · E-Z Dozing · MSHA ID 4501992
    Abandoned
  92. Edwards Pit
    Surface metal/non-metal · M A Segale Inc · MSHA ID 4501186
    Abandoned
  93. Franklin No 10 Strip
    Surface coal · Palmer Coking Coal Company · MSHA ID 4500272
    Abandoned
  94. Harris Clay Mine
    Surface metal/non-metal · Moulden & Sons' Inc · MSHA ID 4501101
    Abandoned
  95. Hazen Quarry
    Surface metal/non-metal · Universal/Land Construction Company · MSHA ID 4503217
    Abandoned
  96. Iddings Portable Wash Plant
    Surface metal/non-metal · Iddings Inc · MSHA ID 4502586
    Abandoned
  97. Indian Pit
    Surface metal/non-metal · M A Segale Inc · MSHA ID 4501236
    Abandoned
  98. Issaquah Shed Pit - Div 4
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501308
    Abandoned
  99. KANGLEY
    Surface metal/non-metal · Kangley Sand & Gravel · MSHA ID 4503377
    Abandoned
  100. Kent Highlands Pit
    Surface metal/non-metal · City Transfer Inc · MSHA ID 4502241
    Abandoned
  101. Kirkland Sand & Gravel Pit
    Surface metal/non-metal · Kirkland Sand & Gravel Inc · MSHA ID 4500648
    Abandoned
  102. Lake Francis Pit
    Surface metal/non-metal · Mid Island Rock Products · MSHA ID 4502848
    Abandoned
  103. Little Mountain Pit
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502065
    Abandoned
  104. Loid Pit
    Surface metal/non-metal · Eastside Sand & Gravel Company · MSHA ID 4503080
    Abandoned
  105. Mainline 100 Pit
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4501958
    Abandoned
  106. Maple Valley Peat Mine
    Surface metal/non-metal · Maple Valley Humis Company · MSHA ID 4500398
    Abandoned
  107. Maury Island Plant
    Surface metal/non-metal · Western-Pacific Construction Materials Company · MSHA ID 4500630
    Abandoned
  108. May Valley Pit
    Surface metal/non-metal · May Valley Sand & Gravel · MSHA ID 4502959
    Abandoned
  109. Melita Pit - Div 10
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502014
    Abandoned
  110. Middle Fork Prospect
    Underground metal/non-metal · Houston Oil & Minerals Corp · MSHA ID 4500890
    Abandoned
  111. Miller River Quarry
    Surface metal/non-metal · Morrison-Knudsen Company Inc · MSHA ID 4500039
    Abandoned
  112. Mono Mine
    Underground metal/non-metal · Mono Mine Inc · MSHA ID 4500478
    Abandoned
  113. Moulden Pit
    Surface metal/non-metal · Moulden & Associates · MSHA ID 4502588
    Abandoned
  114. Mountain View Pit
    Surface metal/non-metal · Watson Asphalt & Paving Company Inc · MSHA ID 4501356
    Abandoned
  115. Muth Quarry
    Surface metal/non-metal · Muth Construction Company · MSHA ID 4501185
    Abandoned
  116. Newcastle Brick Plant Mill
    Facility metal/non-metal · Mutual Materials Company · MSHA ID 4502191
    Abandoned
  117. North Bend Pit Div 5
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501192
    Abandoned
  118. North Fork Pit
    Surface metal/non-metal · H L Riley Hauling Co · MSHA ID 4501720
    Abandoned
  119. Nursery Pit
    Surface metal/non-metal · Weyerhaeuser Company · MSHA ID 4500500
    Abandoned
  120. Person Pit
    Surface metal/non-metal · Person Sand & Gravel Inc · MSHA ID 4503167
    Abandoned
  121. Plant No 4
    Surface metal/non-metal · Reid Sand & Gravel Inc · MSHA ID 4500681
    Abandoned
  122. Pohl Pit - Div 10
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502467
    Abandoned
  123. Poobrager Pit - Div 9
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501309
    Abandoned
  124. PORTABLE CRUSHER #2705
    Surface metal/non-metal · M A Segale Inc · MSHA ID 4503046
    Abandoned
  125. Portable Metso 96
    Surface metal/non-metal · Stafford Excavating LLC · MSHA ID 4503832
    Abandoned
  126. Ps-A-224 Pit
    Surface metal/non-metal · Washington State Department Of Highways · MSHA ID 4502388
    Abandoned
  127. Quadrant Pit
    Surface metal/non-metal · Hos Brothers Construction Inc · MSHA ID 4503151
    Abandoned
  128. Quarry Pit
    Surface metal/non-metal · De Gross Construction Inc · MSHA ID 4502422
    Abandoned
  129. Quartzite Quarry
    Surface metal/non-metal · Manufacturers Mineral Company · MSHA ID 4501123
    Abandoned
  130. R & R Gravel
    Surface metal/non-metal · R & R Investments Inc · MSHA ID 4502743
    Abandoned
  131. Railroad Pit
    Surface metal/non-metal · Burlington Northern Inc · MSHA ID 4502311
    Abandoned
  132. Ravensdale Pit
    Surface metal/non-metal · Industrial Mineral Products Inc · MSHA ID 4502675
    Abandoned
  133. RED-E TOPSOIL
    Surface metal/non-metal · Red-E Topsoil · MSHA ID 4503409
    Abandoned
  134. Redmond Pit
    Surface metal/non-metal · M & M Crushing Company Inc · MSHA ID 4500679
    Abandoned
  135. Reid Pit
    Surface metal/non-metal · Peter Kiewit Sons' Company · MSHA ID 4502699
    Abandoned
  136. Reith Road Pit
    Surface metal/non-metal · City Transfer Inc · MSHA ID 4501226
    Abandoned
  137. Renton Concrete Recyclers
    Surface metal/non-metal · Renton Concrete Recyclers · MSHA ID 4500006
    Abandoned
  138. Renton Pit - Division #4
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502298
    Abandoned
  139. Road 10 Pit
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502061
    Abandoned
  140. Road 150 Pit
    Surface metal/non-metal · Morton Crushing Company · MSHA ID 4502830
    Abandoned
  141. Road 50 Main Pit
    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502058
    Abandoned
  142. Rogers No 3 (Ug)
    Underground coal · Palmer Coking Coal Company · MSHA ID 4500325
    Abandoned
  143. S & S Enterprises
    Surface metal/non-metal · S & S Enterprises · MSHA ID 4502758
    Abandoned
  144. Samac Portable Plant
    Surface metal/non-metal · Samac Trucking · MSHA ID 4503088
    Abandoned
  145. SNOQUALMIE DISTRICT MINE
    Surface metal/non-metal · Weyerhaeuser Company · MSHA ID 4503037
    Abandoned
  146. Standard Pit
    Surface metal/non-metal · Lloyd Enterprises Inc · MSHA ID 4501145
    Abandoned
  147. Stergion Pit
    Surface metal/non-metal · Tim Corliss & Son Inc · MSHA ID 4500773
    Abandoned
  148. Stillwater Pit
    Surface metal/non-metal · Cadman Gravel Company · MSHA ID 4502795
    Abandoned
  149. Summit Pit-Division 7
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501194
    Abandoned
  150. Sunset Materials
    Surface metal/non-metal · Sunset Materials · MSHA ID 4503197
    Abandoned
  151. Sunset Quarry
    Surface metal/non-metal · Stoneway Rock & Recycling Co · MSHA ID 4500087
    Abandoned
  152. Swan Quarry
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4500036
    Abandoned
  153. Sweet Point Quarry
    Surface metal/non-metal · Washington State Department Of Highways · MSHA ID 4502523
    Abandoned
  154. Tjomsland Pit - Division 10
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501230
    Abandoned
  155. Tonga Ridge Pit
    Surface metal/non-metal · B B & K Crushing Inc · MSHA ID 4502861
    Abandoned
  156. Tukwila Crushing And Screening Plan
    Surface metal/non-metal · M A Segale Inc · MSHA ID 4501144
    Abandoned
  157. Usfs/Snoqualmie Natl Forest
    Surface metal/non-metal · U S Forest Service · MSHA ID 4502130
    Abandoned
  158. Valley T Pit
    Surface metal/non-metal · Valley Topsoil Inc · MSHA ID 4502824
    Abandoned
  159. Valley Topsoil Pit
    Surface metal/non-metal · Valley Topsoil Inc · MSHA ID 4503149
    Abandoned
  160. Veazey Quarry
    Surface metal/non-metal · Meridian Aggregates Company · MSHA ID 4500061
    Abandoned
  161. Veazie Quarry #2 - Division 9
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501201
    Abandoned
  162. WHITE RIVER DISTRICT MINE
    Surface metal/non-metal · Weyerhaeuser Company · MSHA ID 4502423
    Abandoned
  163. Wilderness Rock Quarry
    Surface metal/non-metal · Wilderness Rock Quarry · MSHA ID 4502414
    Abandoned
  164. Woodinville Pit
    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501187
    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 WashingtonAll 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.