Abandoned mines in Siskiyou County, California

1. Mine openings

   shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
   954 40.4%
2. Prospect pits and trenches

   shallow exploration diggings that never became a mine
   686 29.0%
3. Mines and surface workings

   labelled mines, open pits, strip mines, placer and hydraulic workings
   246 10.4%
4. Quarries, gravel and borrow pits

   construction-material and industrial-mineral extraction
   355 15.0%
5. Dumps, tailings, spoil and gob

   what mining left above ground
   121 5.1%

…and 52 more named features not listed here.

A name is the label printed beside the symbol on the map. "First mapped" is the earliest topographic edition that shows the symbol, which bounds the feature's age from above; it is not the date it was worked. Unnamed features (most prospect pits, adits and shafts carry no label) are in the counts above but not this list.

1. Alcar #2

   Underground metal/non-metal · Lost Mine Of California Ltd Partnership · MSHA ID 0405048
   Abandoned 1990-03-20
2. Big Mama

   Surface metal/non-metal · Mc Broom & Quigley · MSHA ID 0404603
   Abandoned 1985-07-24
3. Bob Silva Excavation

   Surface metal/non-metal · Bob Silva · MSHA ID 0404408
   Abandoned 1982-08-09
4. Boulder Bar Placer Mine

   Surface metal/non-metal · Earl Anders · MSHA ID 0405047
   Abandoned 1990-07-23
5. Browns

   Surface metal/non-metal · L.P. Enterprises · MSHA ID 0405797
   Abandoned 2025-03-12
6. Butterfly Mine

   Underground metal/non-metal · Middle Earth Mining · MSHA ID 0404435
   Abandoned 1981-10-13
7. California No 1 Portable Crusher

   Surface metal/non-metal · Kiewit Pacific Co. · MSHA ID 0404804
   Abandoned 1995-08-21
8. CCI Mobile Crusher #1

   Surface metal/non-metal · Custom Crushing Industries, Inc. · MSHA ID 0405941
   Abandoned 2020-10-01
9. CECILVILLE

   Surface metal/non-metal · Markey James · MSHA ID 0405223
   Abandoned 1998-07-28
10. CHERRY CR. PLACER

    Surface metal/non-metal · Tyler Mines · MSHA ID 0405246
    Abandoned 1997-06-25
11. Cherry Hill Mine

    Underground metal/non-metal · Lucky Boy Resources LLC · MSHA ID 0404590
    Abandoned 2013-10-01
12. Clifton Pit

    Surface metal/non-metal · Campbell Ready Mix · MSHA ID 0404072
    Abandoned 1989-07-12
13. Discovery Day Mine

    Underground metal/non-metal · Gold Run Enterprises LLC · MSHA ID 0405222
    Abandoned 2014-01-01
14. E T Mine

    Surface metal/non-metal · Whole Earth Mining Company · MSHA ID 0404589
    Abandoned 1985-04-24
15. Eagle Rock Crushing Inc

    Surface metal/non-metal · Eagle Rock Crushing Inc · MSHA ID 0405565
    Abandoned 2013-08-15
16. ECHO MOUNTAIN STONE

    Surface metal/non-metal · Echo Mountain Stone · MSHA ID 0405401
    Abandoned 2000-09-05
17. Eddy Gulch Mines

    Underground metal/non-metal · Miriah Mining Company, Inc. · MSHA ID 0405809
    Abandoned 2010-06-17
18. Eno-Gallia

    Surface metal/non-metal · Eno Mining Corp · MSHA ID 0404726
    Abandoned 1985-07-24
19. ESSAYONS #1

    Surface metal/non-metal · Essayons Inc · MSHA ID 0405424
    Abandoned 2003-04-01
20. Frontier Kolberg Screening Plant #2

    Surface metal/non-metal · Essayons Inc · MSHA ID 0405271
    Abandoned 2003-04-01
21. FRONTIER RECYCLE # 1

    Facility metal/non-metal · Essayons Inc · MSHA ID 0405471
    Abandoned 2003-04-15
22. Golden Cedar Mines Inc

    Surface metal/non-metal · Golden Cedar Mines Inc · MSHA ID 0404566
    Abandoned 1982-05-05
23. Golden Girl

    Surface metal/non-metal · Humbug Mining Company Inc · MSHA ID 0404508
    Abandoned 1982-03-10
24. Golden Girl Dredge

    Surface metal/non-metal · Triple S Mining · MSHA ID 0404507
    Abandoned 1981-10-08
25. Greenhorn Creek Or Greenhorn

    Surface metal/non-metal · S & A Development Company Inc · MSHA ID 0404407
    Abandoned 1984-06-07
26. Grenada Sand & Gravel

    Surface metal/non-metal · Grenada Sand & Gravel · MSHA ID 0404409
    Abandoned 1982-08-09
27. Grey Eagle Mine

    Surface metal/non-metal · Noranda Grey Eagle Mines Inc · MSHA ID 0404492
    Abandoned 1986-07-25
28. Gumboot Mine

    Underground metal/non-metal · Gum Boot Mine · MSHA ID 0405266
    Abandoned 2003-12-03
29. Haywire Mine

    Underground metal/non-metal · Haywire Mine · MSHA ID 0402470
    Abandoned 1994-04-05
30. High Bar Placer

    Surface metal/non-metal · Wabuska Mining LLC · MSHA ID 0405755
    Abandoned 2009-07-20
31. Hole In The Earth #1

    Surface metal/non-metal · Whole Earth Mining Company · MSHA ID 0404506
    Abandoned 1982-05-20
32. Horsethief Butte Pit

    Surface metal/non-metal · International Paper Company · MSHA ID 0402666
    Abandoned 1982-05-19
33. Ironside Mine

    Underground metal/non-metal · Ironside Mine · MSHA ID 0404588
    Abandoned 1983-01-19
34. Klondike Placer Mine

    Surface metal/non-metal · Klondike Mining Inc · MSHA ID 0404597
    Abandoned 1982-07-22
35. Longpoint Placer

    Surface metal/non-metal · Middle Earth Mining · MSHA ID 0404509
    Abandoned 1981-10-09
36. Malloy

    Underground metal/non-metal · Charles W Baird · MSHA ID 0404639
    Abandoned 1986-09-16
37. Menne Pit

    Surface metal/non-metal · Yreka Transit Mix Concrete, Inc. · MSHA ID 0405426
    Abandoned 2014-04-18
38. MONATGUE PLANT

    Surface metal/non-metal · Contractors Sand & Gravel Supply Inc · MSHA ID 0404679
    Abandoned 2001-04-11
39. Monetta Bee

    Surface metal/non-metal · Mitchell-Christensen · MSHA ID 0404694
    Abandoned 1984-10-24
40. Montague Rock Products

    Surface metal/non-metal · Montague Rock Products · MSHA ID 0404729
    Abandoned 1986-04-07
41. Mtn Laurel Quartz Mn/Gold Ball Mill Site

    Underground metal/non-metal · Tanner Mountain Gold, LLC · MSHA ID 0405810
    Abandoned 2011-11-29
42. Offield Placer Mining Company

    Surface metal/non-metal · Offield Placer Mining Company · MSHA ID 0405567
    Abandoned 2007-02-21
43. Portable Crusher

    Surface metal/non-metal · County Of Siskiyou Dept of Public Works · MSHA ID 0405374
    Abandoned 2013-01-10
44. Portable Screen Plant

    Surface metal/non-metal · County of Siskiyou · MSHA ID 0405526
    Abandoned 2008-10-30
45. Rattlesnake Creek

    Surface metal/non-metal · C E M Mining · MSHA ID 0404636
    Abandoned 1989-09-14
46. Rbr Pit

    Surface metal/non-metal · O'Hair Construction Company · MSHA ID 0404405
    Abandoned 1982-08-09
47. Reliance #2

    Surface metal/non-metal · Richard & Linda Brown · MSHA ID 0405027
    Abandoned 1989-09-15
48. SCOTT RIVER PLANT

    Surface metal/non-metal · Contractors Sand & Gravel Supply Inc · MSHA ID 0403404
    Abandoned 1998-08-08
49. Shasta Valley Asphalt & Aggregates

    Surface metal/non-metal · Shasta Valley Asphalt & Aggregate · MSHA ID 0405537
    Abandoned 2004-01-05
50. Siskiyou #141 Homemade Portable Screenin

    Surface metal/non-metal · Siskiyou County Department Of Public Works · MSHA ID 0404420
    Abandoned 1982-07-30
51. Siskiyou #322 Koleman Screening Plant

    Surface metal/non-metal · Siskiyou County Department Of Public Works · MSHA ID 0404419
    Abandoned 1982-07-30
52. Siskiyou #431-E Screening Plant

    Surface metal/non-metal · Siskiyou County Department Of Public Works · MSHA ID 0404422
    Abandoned 1982-07-30
53. SISKIYOU ASPHALT

    Surface metal/non-metal · Siskiyou Asphalt · MSHA ID 0405220
    Abandoned 2000-08-24
54. Siskiyou County Portable Crusher

    Surface metal/non-metal · Siskiyou County Road Department · MSHA ID 0402787
    Abandoned 1981-05-15
55. Siskiyou County Portable Plant

    Surface metal/non-metal · Siskiyou County Road Department · MSHA ID 0404412
    Abandoned 1993-06-04
56. STEINHOFF & MOODY HEAVY EQUIP

    Surface metal/non-metal · Steinhoff & Moody Heavy Equipment · MSHA ID 0405484
    Abandoned 2001-10-01
57. Truax Pit

    Surface metal/non-metal · J F Shea Construction Inc · MSHA ID 0405827
    Abandoned 2011-10-11
58. Truck Village

    Surface metal/non-metal · Darrah Logging, Inc. · MSHA ID 0405607
    Abandoned 2010-04-08
59. West Pit

    Surface metal/non-metal · J F Shea Construction Inc · MSHA ID 0405425
    Abandoned 2008-08-25
60. Whites Gulch Mine

    Surface metal/non-metal · Middle Earth Mining · MSHA ID 0404076
    Abandoned 1978-08-23
61. Yellow Butte Pit #172 Screening Plant

    Surface metal/non-metal · Siskiyou County Department Of Public Works · MSHA ID 0404418
    Abandoned 1982-07-30
62. YREKA TRANSIT MIX

    Surface metal/non-metal · Yreka Transit Mix Concrete Inc · MSHA ID 0405204
    Abandoned 1999-08-17

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

• San Bernardino County 14,976
• Inyo County 11,475
• Kern County 4,879
• Riverside County 3,227
• Mono County 2,946
• Imperial County 1,232
• Mariposa County 1,079
• Tuolumne County 948
• San Diego County 901
• Calaveras County 840
• Shasta County 832
• Trinity County 685

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.