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MSHA mine register by county

Mines in Honolulu County, Hawaii

Honolulu County, Hawaii has 33 mines on MSHA's register: 4 active, 29 abandoned. 1 miner has died and 687 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,129 citations.

Every mine MSHA has registered in Honolulu 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 Honolulu County →

Mines on register
33
Active
4
Fatalities on record
1
Citations issued
1,129
0 underground · 31 surface · 2 facilities 0 coal · 33 metal and non-metal 29 abandoned 687 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.
Honolulu County, Hawaii · Population 1,003,666
0.0%
Mining share of county employment
$104,264
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
Grace Pacific LLC 3 1 0
Pineridge Farms, Inc. 3 0 0
Hawaiian Cement 2 1 0
Hawaiian Dredging Construction Company 2 0 0
Kaiser Cement Corp 2 0 0
Pacific Aggregate 2 1 0
HC&D, LLC 1 1 1
Delta Construction Corporation 1 0 0
H Tanaka Trucking Service Inc 1 0 0
Kalaka Nui, Inc. 1 0 0
Mines in Honolulu County33 on register
  1. Kapaa Quarry And Mill
    Surface metal/non-metal · HC&D, LLC · MSHA ID 5100019
    Active
  2. Makakilo Quarry
    Surface metal/non-metal · Grace Pacific LLC · MSHA ID 5100173
    Active
  3. Halawa Valley
    Surface metal/non-metal · Hawaiian Cement · MSHA ID 5100036
    Active
  4. Portable Plant
    Surface metal/non-metal · Pacific Aggregate · MSHA ID 5100224
    Active
  5. Barbers Point Mill
    Facility metal/non-metal · Hawaiian Cement · MSHA ID 5100056
    Abandoned
  6. Kalaeloa Sand Processing Plant
    Surface metal/non-metal · Grace Pacific Corp · MSHA ID 5100193
    Abandoned
  7. Waianae Plant
    Facility metal/non-metal · Kaiser Cement Corp · MSHA ID 5100025
    Abandoned
  8. Portable Crusher
    Surface metal/non-metal · Oahu Construction Company Ltd · MSHA ID 5100216
    Abandoned
  9. Laie Concrete & Aggregate Incorporated
    Surface metal/non-metal · Laie Concrete & Aggregate Inc · MSHA ID 5100031
    Abandoned
  10. Waianae Quarry
    Surface metal/non-metal · Kaiser Cement Corp · MSHA ID 5100187
    Abandoned
  11. Barber'S Point Limestone Pit
    Surface metal/non-metal · H Tanaka Trucking Service Inc · MSHA ID 5100125
    Abandoned
  12. Portable 2
    Surface metal/non-metal · Pineridge Farms, Inc. · MSHA ID 5100291
    Abandoned
  13. Portable Plant #2
    Surface metal/non-metal · Pacific Aggregate · MSHA ID 5100232
    Abandoned
  14. 1500 TPH Portable Stone Quarry
    Surface metal/non-metal · Hawaiian Dredging Construction Company · MSHA ID 5100217
    Abandoned
  15. 638 TPH Extec Portable Crusher
    Surface metal/non-metal · SAN Construction LLC · MSHA ID 5100251
    Abandoned
  16. Waimanalo Quarry & Mill
    Surface metal/non-metal · Grace Pacific Corp · MSHA ID 5100040
    Abandoned
  17. Portable 1
    Surface metal/non-metal · Pineridge Farms Inc. · MSHA ID 5100272
    Abandoned
  18. KoleKole Quarry
    Surface metal/non-metal · Liana Construction LLC · MSHA ID 5100310
    Abandoned
  19. Koa Ridge, Waipio Gentry
    Surface metal/non-metal · Pineridge Farms Inc. · MSHA ID 5100294
    Abandoned
  20. Mobile Rock Crusher #2
    Surface metal/non-metal · Delta Construction Corporation · MSHA ID 5100311
    Abandoned
  21. Pegson 1
    Surface metal/non-metal · Royal Contracting Co. Ltd · MSHA ID 5100292
    Abandoned
  22. Pvt Recycling
    Surface metal/non-metal · Pvt Land Company Ltd · MSHA ID 5100218
    Abandoned
  23. 660 TPH Portable Crusher
    Surface metal/non-metal · Hawaiian Dredging Construction Company · MSHA ID 5100250
    Abandoned
  24. BR-550 Crusher
    Surface metal/non-metal · Kalaka Nui, Inc. · MSHA ID 5100298
    Abandoned
  25. Coral Pit
    Surface metal/non-metal · Oahu Sugar Company Ltd · MSHA ID 5100006
    Abandoned
  26. Hawaii Portable No 1
    Surface metal/non-metal · Kiewit Pacific Co. · MSHA ID 5100197
    Abandoned
  27. MEI-PP1
    Surface metal/non-metal · MEI Corporation · MSHA ID 5100306
    Abandoned
  28. Nova Group Incorporated
    Surface metal/non-metal · Nova Group Inc · MSHA ID 5100215
    Abandoned
  29. Portable Crusher
    Surface metal/non-metal · R H S Lee Inc · MSHA ID 5100213
    Abandoned
  30. Resource Recovery Ltd
    Surface metal/non-metal · Resource Recovery Ltd · MSHA ID 5100219
    Abandoned
  31. Waimanalo Gulch Landfill
    Surface metal/non-metal · Waste Management of Hawaii · MSHA ID 5100277
    Abandoned
  32. Waimanalo Pit
    Surface metal/non-metal · Pacific Clay Corp · MSHA ID 5100050
    Abandoned
  33. Warren Corporation
    Surface metal/non-metal · Warren Corp · MSHA ID 5100184
    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 HawaiiAll 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.