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Abandoned mines › Florida
Abandoned mine inventory

Abandoned mines in Monroe County, Florida

Monroe County, Florida has 3 mine and prospect features on USGS topographic maps published 1972. MSHA's register carries 21 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Monroe County, 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)
3
Mine openings
0
OSMRE problems unreclaimed
0
MSHA mines marked abandoned
21
0 features carry a name0 prospect pits1 quadrangle maps, published 1972 0 MSHA mines abandoned and sealed
What the features are
  1. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    3 100.0%
MSHA-registered mines with status Abandoned21 on register
  1. Big Pine Key Quarry
    Surface metal/non-metal · Parks Banks Trucking · MSHA ID 0800845
    Abandoned
  2. Big Pine Quarry
    Surface metal/non-metal · Tarmac Florida Inc · MSHA ID 0800960
    Abandoned
  3. BLUE WATERS QUARRY
    Surface metal/non-metal · Upper Keys Marine Construction Inc · MSHA ID 0801119
    Abandoned
  4. Cudjoe Key Quarry
    Surface metal/non-metal · Tarmac Florida Inc · MSHA ID 0801012
    Abandoned
  5. CUDJOE PIT
    Surface metal/non-metal · Cudjoe Enterprises Inc · MSHA ID 0801266
    Abandoned
  6. Grassy Key Pit
    Surface metal/non-metal · M K J Corp · MSHA ID 0800900
    Abandoned
  7. Long Key Pit
    Surface metal/non-metal · Monroe Quarries Inc · MSHA ID 0800923
    Abandoned
  8. Monroe Pit
    Surface metal/non-metal · Capeletti Brothers Inc · MSHA ID 0800934
    Abandoned
  9. Monroe Pit 1
    Surface metal/non-metal · Security Estates Inc · MSHA ID 0800350
    Abandoned
  10. NO NAME KEY
    Surface metal/non-metal · Pinewood Materials Corp · MSHA ID 0801120
    Abandoned
  11. No Name Key Pit
    Surface metal/non-metal · Rudolph Krause & Sons Of Florida Inc · MSHA ID 0801061
    Abandoned
  12. No Name Key Quarry
    Surface metal/non-metal · Florida Keys Fill Inc · MSHA ID 0801052
    Abandoned
  13. No Name Key Rock Pit
    Surface metal/non-metal · BAT Construction Group LLC · MSHA ID 0801330
    Abandoned
  14. No Name Lake Pit
    Surface metal/non-metal · Alonzo Cothron Inc · MSHA ID 0800846
    Abandoned
  15. NOLE PIT
    Surface metal/non-metal · Upper Keys Marine Construction Inc · MSHA ID 0801049
    Abandoned
  16. NOLE PIT
    Surface metal/non-metal · Keystone Products Inc · MSHA ID 0801188
    Abandoned
  17. Pinewood Materials Corp
    Surface metal/non-metal · Pinewood Materials Corp · MSHA ID 0801310
    Abandoned
  18. Port Bougainville
    Surface metal/non-metal · Cabrera Trucking Corp · MSHA ID 0800997
    Abandoned
  19. Rockland Key Pit
    Surface metal/non-metal · Charley Toppino & Sons Inc · MSHA ID 0801249
    Abandoned
  20. Rockland Key Quarry
    Surface metal/non-metal · Tarmac Florida Inc · MSHA ID 0800076
    Abandoned
  21. Tavernier Pit
    Surface metal/non-metal · Alonzo Cothron Inc · MSHA ID 0800327
    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 3
Other counties in FloridaAll 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.