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Abandoned mines › Puerto Rico
Abandoned mine inventory

Abandoned mines in Humacao Municipio, Puerto Rico

Humacao Municipio, Puerto Rico has 6 mine and prospect features on USGS topographic maps published 1946–1982. MSHA's register carries 43 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Humacao Municipio, every OSMRE abandoned mine land problem in the county, and every MSHA-registered mine here with status Abandoned. Named features are listed below; unnamed ones are counted by type. Locations are deliberately not shown: this page says what abandoned workings are in the county, not where to find them. They are dangerous and should not be entered.

Mapped mine features (USGS)
6
Mine openings
0
OSMRE problems unreclaimed
0
MSHA mines marked abandoned
43
0 features carry a name0 prospect pits1 quadrangle maps, published 1946–1982 0 MSHA mines abandoned and sealed
What the features are
  1. Mines and surface workings
    labelled mines, open pits, strip mines, placer and hydraulic workings
    1 16.7%
  2. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    5 83.3%
MSHA-registered mines with status Abandoned43 on register
  1. AGREGADOS VISTA DE LA MONTONIA
    Surface metal/non-metal · Agregados Vista De La Montana · MSHA ID 5400427
    Abandoned
  2. ARENA SOLAR, INC.
    Surface metal/non-metal · Mr Sun Ready Mix Inc · MSHA ID 5400269
    Abandoned
  3. Arena Tesoro Escondido
    Surface metal/non-metal · Rafael Colon Homs Inc · MSHA ID 5400265
    Abandoned
  4. Arenas De Humacao Incorporated
    Surface metal/non-metal · Arenas De Humacao Inc · MSHA ID 5400278
    Abandoned
  5. Arenas De Naguabo
    Surface metal/non-metal · Arenas De Naguabo Inc · MSHA ID 5400288
    Abandoned
  6. Arenas Yabucoa
    Surface metal/non-metal · R S V J Inc · MSHA ID 5400431
    Abandoned
  7. Arenera Santiago
    Surface metal/non-metal · Gregorio Santiago Arce · MSHA ID 5400267
    Abandoned
  8. ARENERO 3 C
    Surface metal/non-metal · 3 C Construction Corp · MSHA ID 5400387
    Abandoned
  9. Arenero Carrion
    Surface metal/non-metal · William Carrion · MSHA ID 5400217
    Abandoned
  10. Arenero Hato
    Surface metal/non-metal · F A A I Construction Corp · MSHA ID 5400245
    Abandoned
  11. Arenero Humacao
    Surface metal/non-metal · Arenero Humacao · MSHA ID 5400478
    Abandoned
  12. ARENERO HUMACAO - 923
    Surface metal/non-metal · Arenero Humacao · MSHA ID 5400403
    Abandoned
  13. Arenero Paya Guayanes
    Surface metal/non-metal · Coop Camioneros De Oriente Inc · MSHA ID 5400329
    Abandoned
  14. ARENERO PEREZ
    Surface metal/non-metal · Cantera Perez Inc · MSHA ID 5400138
    Abandoned
  15. Arenero Punta Santiago
    Surface metal/non-metal · Movimiento Inc · MSHA ID 5400356
    Abandoned
  16. ARENERO ROIG
    Surface metal/non-metal · Arenero Roig · MSHA ID 5400177
    Abandoned
  17. Arenero Santiago
    Surface metal/non-metal · Francisco Santiago · MSHA ID 5400322
    Abandoned
  18. Arenero Vazquez
    Surface metal/non-metal · Arenero Vazquez · MSHA ID 5400273
    Abandoned
  19. CANTERA DEL ESTE
    Surface metal/non-metal · Unlimited Products Inc · MSHA ID 5400377
    Abandoned
  20. Cantera del Este LLC
    Surface metal/non-metal · Cantera del Este LLC · MSHA ID 5400451
    Abandoned
  21. Cantera La Francia
    Surface metal/non-metal · Hormigonera Viequenses Inc · MSHA ID 5400208
    Abandoned
  22. Cantera Perez
    Surface metal/non-metal · AGREGADOS HUMACAO LLC · MSHA ID 5400037
    Abandoned
  23. CANTERA SAN ISDRO
    Surface metal/non-metal · Las Piedras Sand Inc · MSHA ID 5400416
    Abandoned
  24. Carruso Aggregates
    Surface metal/non-metal · Carruso Aggregates Inc · MSHA ID 5400353
    Abandoned
  25. El Coqui
    Surface metal/non-metal · DMC Aggregates Corporation · MSHA ID 5400470
    Abandoned
  26. Gravero Alvira
    Surface metal/non-metal · Carlama Inc · MSHA ID 5400220
    Abandoned
  27. Gravero Berrios
    Surface metal/non-metal · Agregados Berrios Inc · MSHA ID 5400026
    Abandoned
  28. Gravero de San Lorenzo, LLC
    Surface metal/non-metal · Gravero de San Lorenzo, LLC · MSHA ID 5400475
    Abandoned
  29. GRAVERO EEC
    Surface metal/non-metal · East Contractor Corp · MSHA ID 5400419
    Abandoned
  30. Gravero Juncos
    Surface metal/non-metal · Ramon Ponce Enterprises · MSHA ID 5400321
    Abandoned
  31. Gravero Lirios
    Surface metal/non-metal · Desarrollos Multiples Insulares · MSHA ID 5400331
    Abandoned
  32. Gravero Navarro
    Surface metal/non-metal · Agregados Navarro Inc · MSHA ID 5400063
    Abandoned
  33. Gravero Padilla
    Surface metal/non-metal · Coarse & Sand Aggregates Inc · MSHA ID 5400174
    Abandoned
  34. Gravero Palo Seco
    Surface metal/non-metal · Maunabo Sand & Gravel · MSHA ID 5400061
    Abandoned
  35. Gravero Quebrada
    Surface metal/non-metal · Arena De San Lorenzo Inc · MSHA ID 5400212
    Abandoned
  36. Harbert-Jones Companies Pr
    Surface metal/non-metal · Harbert-Jones Companies Pr · MSHA ID 5400302
    Abandoned
  37. Hato Nuevo Sand & Gravel
    Surface metal/non-metal · Hato Nuevo Sand & Gravel Inc · MSHA ID 5400339
    Abandoned
  38. JOSE A LOPEZ PEDRO
    Surface metal/non-metal · Jose A Lopez Pedro · MSHA ID 5400346
    Abandoned
  39. LAS PIEDRAS SAND INC.
    Surface metal/non-metal · Las Piedras Sand Inc · MSHA ID 5400384
    Abandoned
  40. Nunez Aggregates
    Surface metal/non-metal · Juan A Nunez · MSHA ID 5400457
    Abandoned
  41. RO Construction Corporation
    Surface metal/non-metal · RO Construction Corporation · MSHA ID 5400482
    Abandoned
  42. Terrassa Sand & Gravel Incorporated
    Surface metal/non-metal · Terrassa Sand & Gravel Inc · MSHA ID 5400274
    Abandoned
  43. TRANSPORTE NEGRON
    Surface metal/non-metal · Transporte Negron · MSHA ID 5400320
    Abandoned

Status and date are as reported to MSHA by the operator. Each mine's own page carries its accident, citation and inspection record.

By source vocabularythe publishers' own terms
Feature type Features
Quarry 4
Quarry 1
Disturbed Surface 1
Other counties in Puerto RicoAll counties →
How to read these numbers

A USGS feature is a symbol on a historical topographic map, there when the map was surveyed; it may since have been sealed, reclaimed, built over or reopened as a working mine, and the map does not say which. An OSMRE row is a problem the abandoned mine land program tracks, not a mine. An MSHA mine is a registered operation whose operator reported abandonment, a record that starts in the 1970s. The three overlap and are never added together. The county is assigned from each feature's coordinates against the Census 2023 county boundaries. The full method is on the national page.

Sources
  1. USGS, Consolidated Prospect- and Mine-Related Features from 7.5- and 15-Minute Topographic Quadrangle Maps of the United States (USMIN)
    597,612 point and area features digitized from about 106,350 historical topographic maps published 1886–2006; public domain (CC0). A feature is a map symbol, not a field-verified site, and the map does not say whether it was still worked.
  2. USGS Fact Sheet 2025–3003, The Abandoned Mine Inventory of the United States
    States that as of 2025 there is no comprehensive national inventory of abandoned mine features, and that the detailed national database now being built will not be published.
  3. OSMRE, Abandoned Mine Land Inventory System (e-AMLIS), public Problems layer
    One row per abandoned mine land problem in a problem area, with its type, funding program and reclamation status; mostly coal mined before the 1977 Surface Mining Control and Reclamation Act. Coordinates are the problem area's.
  4. MSHA, Mines dataset (Mine Data Retrieval System)
    Every mine registered with MSHA since the 1970s; a mine reads Abandoned or Abandoned and Sealed when its operator reported that status. Refreshed weekly.
  5. US Census Bureau, 2023 cartographic county boundaries (1:500,000)
    Each feature's county is assigned by its coordinates against these boundaries, not copied from the source file.
  6. GAO-20-238, Abandoned Hardrock Mines (March 2020)
    Federal agencies had identified at least 140,000 abandoned hardrock mine features on federal land and estimated more than 390,000 more not yet captured in their databases.
  7. Abandoned Hardrock Mine Reclamation (AHMR) Program, US Department of the Interior
    The program the USGS inventory is compiled for. Its appropriations and the 674,000 field-confirmed feature count on this page were provided by the program manager, Office of Environmental Policy and Compliance, and are cited with permission (2026-09-08).
  8. IMCC-NAAMLP Hardrock AML Report
    Page 48 carries the two figures this page leans on: USGS estimates 633,181 of the 725,690 mine features it recorded from historic topographic maps, 87 percent, are hardrock; and state and federal agencies have submitted more than 724,000 AML features to the national database being built, already more than the historic maps hold. Year-by-year AHMR funding is on page 35.