Checked
Mines in California
Mines reported to the Mine Safety and Health Administration
- Mines listed
- 421
- Active
- 300
- Employees
- 7,538
- Accidents reported in 2025
- 155
Mines are listed from MSHA's mine data, excluding mines recorded as abandoned. Accident counts are reports filed with MSHA for the calendar year, including injuries and illnesses at the mine, and are counts only. Operator names are shown only when they are companies or agencies.
Largest mines by employees
Swipe the table sideways to see more columns.
| Mine | Type | Status | Employees | Accidents 2025 |
|---|---|---|---|---|
| Mt Pass Mine & Mill | Metal/nonmetal, Surface | Active | 790 | 15 |
| Boron Operations | Metal/nonmetal, Surface | Active | 624 | 12 |
| Mesquite | Metal/nonmetal, Surface | Active | 277 | 1 |
| Imerys Lompoc Plant | Metal/nonmetal, Surface | Active | 198 | 0 |
| Soledad Mountain Project | Metal/nonmetal, Surface | Active | 179 | 7 |
| Cushenbury Plant | Metal/nonmetal, Facility | Active | 160 | 6 |
| Oro Grande Quarry | Metal/nonmetal, Facility | Active | 137 | 3 |
| Black Mountain Quarry | Metal/nonmetal, Facility | Active | 133 | 4 |
| Mojave Plant & Quarry | Metal/nonmetal, Facility | Active | 133 | 3 |
| Victorville Cement Plant | Metal/nonmetal, Facility | Active | 126 | 5 |
| A R Wilson Quarry | Metal/nonmetal, Surface | Active | 115 | 4 |
| Lebec Cement Plant | Metal/nonmetal, Facility | Active | 112 | 7 |
| Tehachapi Cement, LLC. | Metal/nonmetal, Facility | Active | 101 | 3 |
| 3M | Metal/nonmetal, Surface | Active | 93 | 0 |
| Lucerne Valley Plant and Quarry | Metal/nonmetal, Surface | Active | 86 | 1 |
| Maricopa Plant | Metal/nonmetal, Surface | Active | 86 | 0 |
| 3m Corona Plant | Metal/nonmetal, Surface | Active | 85 | 3 |
| Specialty Granules (Ione) LLC | Metal/nonmetal, Surface | Active | 74 | 4 |
| Redding Plant | Metal/nonmetal, Surface | Active | 73 | 2 |
| Natividad Plant | Metal/nonmetal, Surface | Active | 72 | 0 |
| Lake Herman Quarry | Metal/nonmetal, Surface | Active | 68 | 0 |
| Omya California | Metal/nonmetal, Surface | Active | 62 | 2 |
| Stevens Creek Quarry | Metal/nonmetal, Surface | Active | 56 | 1 |
| Taft Production Company & Mines | Metal/nonmetal, Surface | Active | 56 | 1 |
| All American Aggregates | Metal/nonmetal, Surface | Active | 55 | 1 |
| Canyon Rock Plant | Metal/nonmetal, Surface | Active | 55 | 4 |
| Upland Pit and Mill | Metal/nonmetal, Surface | Active | 55 | 5 |
| Blue Mountain Minerals | Metal/nonmetal, Surface | Active | 54 | 2 |
| Dicalite Minerals | Metal/nonmetal, Surface | Active | 53 | 1 |
| Perkins Plant | Metal/nonmetal, Surface | Active | 53 | 0 |
| Pleasanton Plant | Metal/nonmetal, Surface | Active | 52 | 1 |
| Napa Quarry | Metal/nonmetal, Surface | Active | 50 | 1 |
| USMC Ione Plant | Metal/nonmetal, Surface | Active | 50 | 4 |
| Sydney Peak Stone | Metal/nonmetal, Surface | Active | 48 | 0 |
| Lytle Creek Pit | Metal/nonmetal, Surface | Active | 44 | 1 |
| Irwindale Aggregates | Metal/nonmetal, Surface | Active | 43 | 1 |
| Orange County Operation | Metal/nonmetal, Surface | Active | 43 | 1 |
| Tule River/Success Dam | Metal/nonmetal, Surface | Active | 39 | 0 |
| Vernalis Plant | Metal/nonmetal, Surface | Active | 39 | 0 |
| Castle Mountain Mine | Metal/nonmetal, Surface | Active | 38 | 0 |
| Durbin Plant | Metal/nonmetal, Surface | Active | 38 | 1 |
| Irwindale Plant | Metal/nonmetal, Surface | Active | 35 | 0 |
| Reliance Plant | Metal/nonmetal, Surface | Active | 35 | 0 |
| Corona Plant | Metal/nonmetal, Surface | Active | 33 | 0 |
| Chula Vista Quarry | Metal/nonmetal, Surface | Active | 32 | 0 |
| Pacific Aggregates Pits | Metal/nonmetal, Surface | Active | 30 | 6 |
| Sierra Silica Resources | Metal/nonmetal, Surface | Active | 30 | 0 |
| Cabazon | Metal/nonmetal, Surface | Active | 28 | 0 |
| Rialto | Metal/nonmetal, Surface | Active | 28 | 1 |
| Corona | Metal/nonmetal, Surface | Active | 27 | 3 |
| Plaster City Quarry | Metal/nonmetal, Surface | Active | 27 | 1 |
| Mission Gorge Plant | Metal/nonmetal, Surface | Active | 25 | 0 |
| San Emidio Plant | Metal/nonmetal, Surface | Active | 25 | 0 |
| San Rafael Rock Quarry | Metal/nonmetal, Surface | Active | 25 | 2 |
| Valley Rock Products-Orland | Metal/nonmetal, Surface | Active | 25 | 0 |
| San Bernardino Plant | Metal/nonmetal, Surface | Active | 24 | 1 |
| Coalinga Pit | Metal/nonmetal, Surface | Active | 23 | 0 |
| Nichols Road Pit | Metal/nonmetal, Surface | Active | 23 | 0 |
| Newberry Mill | Metal/nonmetal, Facility | Active | 23 | 1 |
| Arcosa Frazier Park Plant# 1603 | Metal/nonmetal, Surface | Active | 22 | 2 |
| Coast Aggregates Big Rock Creek | Metal/nonmetal, Surface | Active | 22 | 0 |
| Lakeside - Vigilante Aggregates | Metal/nonmetal, Surface | Active | 22 | 0 |
| Deer Creek Asphalt | Metal/nonmetal, Surface | Active | 21 | 1 |
| G3 Enterprises Byron Plant | Metal/nonmetal, Surface | Active | 21 | 1 |
| Lost Hills Mining | Metal/nonmetal, Surface | Active | 21 | 1 |
| Orosi Quarry | Metal/nonmetal, Surface | Active | 21 | 0 |
| Bradshaw | Metal/nonmetal, Surface | Active | 20 | 0 |
| Chandler Aggregates - Gilman Springs | Metal/nonmetal, Surface | Active | 20 | 1 |
| Soiland Co., Inc. | Metal/nonmetal, Surface | Active | 20 | 0 |
| Teichert-Grantline Plant | Metal/nonmetal, Surface | Active | 20 | 1 |
| Vernalis Plant | Metal/nonmetal, Surface | Active | 20 | 0 |
| Austin Quarry | Metal/nonmetal, Surface | Active | 19 | 0 |
| Eagle Valley Aggregates | Metal/nonmetal, Surface | Active | 19 | 0 |
| HJ Hove | Metal/nonmetal, Surface | Active | 19 | 0 |
| Maitri Canyon Plant | Metal/nonmetal, Surface | Active | 19 | 0 |
| Pebbly Beach Quarry | Metal/nonmetal, Surface | Active | 19 | 2 |
| Sunol Aggregates | Metal/nonmetal, Surface | Active | 19 | 1 |
| TRP Table Mountain Plant | Metal/nonmetal, Surface | Active | 19 | 0 |
| Cache Creek Quarry | Metal/nonmetal, Surface | Active | 18 | 0 |
| Mossdale Plant | Metal/nonmetal, Surface | Active | 18 | 0 |
| Sanger Plant | Metal/nonmetal, Surface | Active | 18 | 0 |
| Western Aggregates LLC | Metal/nonmetal, Surface | Active | 18 | 0 |
| TRP-Sacramento Plant | Metal/nonmetal, Surface | Active | 17 | 0 |
| Eliot Plant | Metal/nonmetal, Surface | Active | 16 | 0 |
| Holliday Rock-Little Rock Plant | Metal/nonmetal, Surface | Active | 16 | 0 |
| Lynx Cat Quarry | Metal/nonmetal, Surface | Active | 16 | 0 |
| Woodland Plant | Metal/nonmetal, Surface | Active | 16 | 0 |
| Campus Plant | Metal/nonmetal, Surface | Active | 15 | 1 |
| Canyon Rock Co Inc | Metal/nonmetal, Surface | Active | 15 | 0 |
| Capital Rock LLC | Metal/nonmetal, Surface | Active | 15 | 1 |
| Clayton Aggregates | Metal/nonmetal, Surface | Active | 15 | 0 |
| Edmonston Rock Plant | Metal/nonmetal, Surface | Active | 15 | 0 |
| GMcB Lincoln Pits & Mill | Metal/nonmetal, Surface | Active | 15 | 0 |
| Hallwood Plant | Metal/nonmetal, Surface | Active | 15 | 0 |
| Jackson Valley Quarry | Metal/nonmetal, Surface | Active | 15 | 0 |
| Maitri Sand and Gravel | Metal/nonmetal, Surface | Active | 15 | 0 |
| Palmdale Plant | Metal/nonmetal, Surface | Active | 15 | 0 |
| TRP-Los Banos Plant | Metal/nonmetal, Surface | Active | 15 | 1 |
| West Coast Brubaker-Mann | Metal/nonmetal, Surface | Active | 15 | 0 |
| Banning | Metal/nonmetal, Surface | Active | 14 | 0 |
| Boca Quarry | Metal/nonmetal, Surface | Intermittent | 14 | 0 |
| Clayton Plant | Metal/nonmetal, Surface | Active | 14 | 0 |
| Grimes Rock a CalPortland Company | Metal/nonmetal, Surface | Active | 14 | 1 |
| Rocky Canyon Plant | Metal/nonmetal, Surface | Active | 14 | 0 |
| Table Mountain Plant & Quarry | Metal/nonmetal, Surface | Active | 14 | 0 |
| Wayne J. Sand & Gravel Inc. | Metal/nonmetal, Surface | Active | 14 | 0 |
| Esparto Plant | Metal/nonmetal, Surface | Temporarily Idled | 13 | 0 |
| Littlerock Quarry | Metal/nonmetal, Surface | Active | 13 | 0 |
| Madera Quarry, Inc. | Metal/nonmetal, Surface | Intermittent | 13 | 0 |
| Morehead Pit | Metal/nonmetal, Surface | Active | 13 | 0 |
| Santa Margarita Aggregates | Metal/nonmetal, Surface | Active | 13 | 0 |
| Azusa Rock | Metal/nonmetal, Surface | Active | 12 | 0 |
| Blue Mountain Minerals PR LLC | Metal/nonmetal, Surface | Active | 12 | 0 |
| Clearlake Lava | Metal/nonmetal, Surface | Active | 12 | 0 |
| Capay Plant Facility | Metal/nonmetal, Surface | Active | 12 | 0 |
| Felton Quarry | Metal/nonmetal, Surface | Active | 12 | 0 |
| Hector Mine | Metal/nonmetal, Surface | Active | 12 | 0 |
| Redlands | Metal/nonmetal, Surface | Active | 12 | 0 |
| Roblar Quarry LLC | Metal/nonmetal, Facility | Active | 12 | 0 |
| Rockfield Plant | Metal/nonmetal, Surface | Active | 12 | 0 |
| Sisquoc Aggregates | Metal/nonmetal, Surface | Active | 12 | 0 |
| Sand Merchant | Metal/nonmetal, Surface | Active | 12 | 1 |
| Winton Pit & Mill | Metal/nonmetal, Surface | Active | 12 | 0 |
| API Pit | Metal/nonmetal, Surface | Active | 11 | 0 |
| Blue Rock Quarry | Metal/nonmetal, Surface | Active | 11 | 0 |
| Coachella Valley Aggregate | Metal/nonmetal, Surface | Active | 11 | 1 |
| Florin Plant | Metal/nonmetal, Facility | Active | 11 | 0 |
| Greenhorn Pit & Mill | Metal/nonmetal, Surface | Active | 11 | 0 |
| Hallwood Plant | Metal/nonmetal, Surface | Active | 11 | 0 |
| Knife River Construction Vernalis Plant | Metal/nonmetal, Surface | Active | 11 | 0 |
| Munn & Perkins Pit & Mill | Metal/nonmetal, Surface | Active | 11 | 0 |
| Scheerer Quarry | Metal/nonmetal, Surface | Active | 11 | 0 |
| West Coast Aggregate Supply Inc | Metal/nonmetal, Surface | Active | 11 | 0 |
| Cupertino Quarry | Metal/nonmetal, Surface | Intermittent | 10 | 0 |
| DeSilva Gates Aggregates | Metal/nonmetal, Surface | Active | 10 | 0 |
| Diamond Quarry | Metal/nonmetal, Surface | Active | 10 | 0 |
| Eagle Mountain Mine | Metal/nonmetal, Surface | Active | 10 | 0 |
| Garey Rock Plant | Metal/nonmetal, Surface | Active | 10 | 1 |
| Kaweah South | Metal/nonmetal, Surface | Active | 10 | 0 |
| Merced Aggregates | Metal/nonmetal, Surface | Active | 10 | 0 |
| Palmdale | Metal/nonmetal, Surface | Active | 10 | 0 |
| Robert E Hove Pit | Metal/nonmetal, Surface | Active | 10 | 2 |
| Redlands Quarry | Metal/nonmetal, Surface | Active | 10 | 0 |
| S.r.i. Marysville | Metal/nonmetal, Surface | Active | 10 | 0 |
| Sanger Aggregate Plant | Metal/nonmetal, Surface | Active | 10 | 0 |
| Santee Aggregates | Metal/nonmetal, Surface | Active | 10 | 0 |
| The Standard Mine | Metal/nonmetal, Surface | Active | 10 | 0 |
| Harris Quarry | Metal/nonmetal, Surface | Active | 9 | 0 |
| Knife River Newman Aggregate | Metal/nonmetal, Surface | Active | 9 | 1 |
| La Grange Mine | Metal/nonmetal, Surface | Active | 9 | 0 |
| Marina Landfill | Metal/nonmetal, Surface | Active | 9 | 0 |
| Moorpark Quarry | Metal/nonmetal, Surface | Active | 9 | 0 |
| Orland Plant | Metal/nonmetal, Surface | Active | 9 | 0 |
| Thomes Creek Rock Co Inc | Metal/nonmetal, Surface | Active | 9 | 0 |
| Big Seam mine | Metal/nonmetal, Underground | Active | 8 | 0 |
| Concrete, Inc DBA Knife River | Metal/nonmetal, Surface | Active | 8 | 1 |
| Cool Cave Quarry | Metal/nonmetal, Surface | Active | 8 | 0 |
| Decker Island | Metal/nonmetal, Surface | Intermittent | 8 | 0 |
| Lucerne Valley | Metal/nonmetal, Surface | Active | 8 | 0 |
| Mark West Quarry | Metal/nonmetal, Surface | Active | 8 | 0 |
| Mojave Pit | Metal/nonmetal, Surface | Active | 8 | 1 |
| Morris Ravine Mine | Metal/nonmetal, Surface | Active | 8 | 0 |
| Olive Springs Quarry Inc | Metal/nonmetal, Surface | Active | 8 | 0 |
| SWA @ Mountain Gate Quarry | Metal/nonmetal, Surface | Active | 8 | 1 |
| Santa Paula Materials | Metal/nonmetal, Surface | Active | 8 | 0 |
| Shaw Pit | Metal/nonmetal, Surface | Intermittent | 8 | 0 |
| Sierra White | Metal/nonmetal, Surface | Active | 8 | 0 |
| Washington Mine | Metal/nonmetal, Underground | Active | 8 | 0 |
| 7/11 Materials Inc | Metal/nonmetal, Surface | Active | 7 | 0 |
| Aggregate Products | Metal/nonmetal, Surface | Active | 7 | 1 |
| Amboy Limestone Quarry | Metal/nonmetal, Surface | Intermittent | 7 | 0 |
| Bear Creek Quarry | Metal/nonmetal, Surface | Intermittent | 7 | 0 |
| Bee Rock Quarry | Metal/nonmetal, Surface | Active | 7 | 0 |
| Cabazon Rock Plant | Metal/nonmetal, Surface | Active | 7 | 0 |
| Cal Rock Products LLC | Metal/nonmetal, Surface | Intermittent | 7 | 0 |
| El Jay Cone | Metal/nonmetal, Surface | Intermittent | 7 | 0 |
| Fawndale Rock & Asphalt | Metal/nonmetal, Surface | Active | 7 | 0 |
| Glass Mountain Pumice | Metal/nonmetal, Surface | Active | 7 | 0 |
| Handley Ranch Quarry | Metal/nonmetal, Surface | Active | 7 | 0 |
| Peck Road Gravel Pit | Metal/nonmetal, Surface | Active | 7 | 0 |
| Parks Bar Quarry | Metal/nonmetal, Surface | Active | 7 | 0 |
| Stringer Pit | Metal/nonmetal, Surface | Active | 7 | 0 |
| Superior - Twin Oaks | Metal/nonmetal, Surface | Active | 7 | 1 |
| CCI Mobile Crusher #2 | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Cain Ranch Aggregate Quarry | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Colosseum Rare Metals Inc. | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Crushing Screening | Metal/nonmetal, Surface | Active | 6 | 0 |
| Diamond T Natural Resources, LLC | Metal/nonmetal, Surface | Active | 6 | 0 |
| Hogan Quarry | Metal/nonmetal, Surface | Active | 6 | 0 |
| Highway 175 Quarry | Metal/nonmetal, Surface | Active | 6 | 0 |
| Juniper Flats | Metal/nonmetal, Surface | Active | 6 | 0 |
| North Fontana | Metal/nonmetal, Surface | Active | 6 | 0 |
| Plant 25 | Metal/nonmetal, Surface | Active | 6 | 0 |
| Painted Hills Quarry | Metal/nonmetal, Surface | Active | 6 | 0 |
| Plymouth Sand & Gravel | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Protech Minerals, LLC | Metal/nonmetal, Facility | Active | 6 | 0 |
| Pt Lakeview Rock & Redi Mix | Metal/nonmetal, Surface | Active | 6 | 0 |
| Roads Extec Crusher | Metal/nonmetal, Surface | Intermittent | 6 | 0 |
| Silver Lake Mine | Metal/nonmetal, Surface | Active | 6 | 1 |
| Solvang Plant | Metal/nonmetal, Surface | Active | 6 | 0 |
Other mines
No employees reported
- 7/11 Materials - Coyote Valley Aggregate · Active
- 75th Street Quarry and Recycling · Active
- 966ab McCloskey · Intermittent
- 968AB Power Screen · Intermittent
- Academy Black · Active
- Acin Ranch · Active
- Acton Clay Quarries · Active
- Almond Avenue Mine · Intermittent
- Alpha Materials, Inc. · Active
- Alton Pit & Mill · Active
- American Girl Mine East · Intermittent
- Ammex Site · Active
- Bangor Quarry · Intermittent
- Baxter Mine · Intermittent
- Bear Butte Quarry · Active
- Bear River Materials · Active
- Beck Mine · Active
- Bess Bar · Intermittent
- Bianchi Pit · Active
- Big Iron DG Mine · Active
- Big Rock Creek Quarry · Active
- Black Angel Vulcan · Intermittent
- Blasted Rock Quarry · Intermittent
- Blue Moon Underground Mine · Active
- Bridgeville Quarry · Intermittent
- Canebrake Pit · Active
- Chili Bar Slate · Active
- China Hill (Volcano) Quarry · Temporarily Idled
- Christie Bar · Active
- Clark Pit · Active
- Crawford's Mine · Active
- Crystal Creek Aggregates · Active
- Cucamonga Creek Mine · Active
- Curtner Quarry · Intermittent
- Dawson Quarry · Intermittent
- Decomposed Granite Pit (LG) · Active
- Deer Creek Plant · Intermittent
- Delaney Aggregates · Intermittent
- Dillon Plant · Active
- Dillon Road Pit · Active
- DNA Ridge Rock · Active
- Dolomite Mine · Active
- Dunn Mill · Intermittent
- Dunstone Rock Quarry · Intermittent
- Eagle Valley · Active
- Edison Sand Pit · Active
- El Cajon Quarry · Active
- Ellwood Pit · Active
- ERM Rock · Intermittent
- Estrella Sand Pit · Intermittent
- Extec · Intermittent
- Feather River Rock South Chester Pit · Intermittent
- Fish Springs Quarry · Active
- Fisher Industries Plant 27 · Temporarily Idled
- Fitch Road Pit · Active
- Foothill Granite LLC · Intermittent
- Ford Gravel · Active
- Ford Quarries · Active
- Fort Independence Quarry · Active
- Fountain Springs · Active
- Frink · Active
- Frink Pit · Intermittent
- Gem Hill Mine Site · Intermittent
- Geo Plant · Intermittent
- Gilstrap Trucking,Inc. · Intermittent
- Global Pumice Mine - Olancha · Active
- Goodwin Sand & Gravel · Intermittent
- Gordon Sand Co · Active
- Graham Equipment · Intermittent
- Greenstone Materials Quarry · Active
- Greenwood Aggregates · Intermittent
- Grist Creek Aggregates, Longvale Plant · Active
- Guadalupe · Temporarily Idled
- H.L. Rodney · Active
- Hatchery Road Crusher · Active
- Hidden Canyon Quarry · Active
- Hoopa Valley Tribe Roads Department · Active
- Hughson Aggregates · Active
- Humboldt Quarries · Intermittent
- Humboldt Screener · Intermittent
- Ibex Bentonite · Intermittent
- Imperial Valley Aggregates · Active
- iRock Crusher · Active
- Iron Age Mine · Intermittent
- Jerry Brown · Active
- Johnson Pit · Intermittent
- Kellog Creek Aggregates Inc · Active
- Kelsey Creek Mill · Intermittent
- KMI Zeolite Mine · Intermittent
- La Grange Pit & Mill · Intermittent
- Langley Hill Quarry · Active
- Larranaga Pit · Intermittent
- Latona Aggregates · Active
- Le Grand Asphalt · Temporarily Idled
- Lemoncove Granite · Active
- Lexington Quarry · Active
- Lincoln Mine Project · NonProducing
- Lind Marine Incorporated · Active
- Liscom Hill Quarry · Intermittent
- Little Chico Creek · Intermittent
- Long Decomposed Granite Pit · Intermittent
- Long Ranch Quarry · Intermittent
- LT105 Jaw · Intermittent
- LT106 Jaw · Intermittent
- Lucerne Valley Pit · Active
- Makayla · Active
- Martin Marietta Hughson Plant · Intermittent
- Martis Valley Plant · Intermittent
- Mayhew Plant · Active
- MDS M515 Screener · Intermittent
- Mercer Fraser Plant B Portable Crusher · Intermittent
- Merrill Borrow Pit · Intermittent
- Mesquite Lake Gypsum Mine · Active
- Mojave Rock Mine · Active
- Moores Gravel Inc · Active
- Mt. Gaines Mine · Active
- MTN Springs Rd. Pit · Intermittent
- Navajo Rock & Block · Active
- Oceanview Mine · Active
- Ohe Sand & Gravel Inc · Active
- Ojai Quarry · Active
- Oro Grande Pit · Active
- Owens Lake Mine · Intermittent
- Pacific Clay Pits · Active
- Pacific Heights Pit · Active
- Pacific Rock Inc · Active
- Packway Portable · Active
- Panamint Mine · Intermittent
- Panamint Valley Limestone Quarry · Active
- Parks Quarry · Intermittent
- Paso Robles Plant · Intermittent
- Paynes Creek Quarry · Intermittent
- PC-100 · Intermittent
- PC-1200 - Smith River Site · Intermittent
- Permanente Cement Plant & Quarry · Temporarily Idled
- Pier 92 Marine Aggregate · Active
- Pine Canyon Quarry · Active
- Pine Creek Rock · Active
- Plant #5 · Active
- Portable · Temporarily Idled
- Portable #1 · Temporarily Idled
- Portable #1 · Intermittent
- Portable #1 · Intermittent
- Portable #1 Big Plant · Intermittent
- Portable Plant · Active
- Portable Plant #1 · Active
- Portable Plant #2 · Intermittent
- Portable Plant 1 · Active
- Portable Screen Plant · Intermittent
- Poway Aggregates · Intermittent
- Powerscreen 1300 Max PID13MXTCOMC55064 · Active
- Powerscreen 1800 Warrior PID00123PDGF299 · Intermittent
- Powerscreen Jaw PIDPT400HOME28251 · Intermittent
- Powerscreen Trakpactor Crusher · Intermittent
- Quail Hollow Operation · Active
- R Brown & Son's Quarry · Intermittent
- Randall Sand & Gravel · Active
- Rebecca De Boy Mine · Intermittent
- Red Ledge Mine · Intermittent
- Red Top Mine · Active
- Renewable Resources · Active
- Reynoso Brothers Quarry · Intermittent
- Ridge Rock Quarry · Active
- Ridgecrest Rock Plant · Active
- Riverside Operation · Active
- Roberti Ranch · Intermittent
- Robinson Gravel Pit / Ophir Rd. Quarry · Active
- Rosemary's Mountain Quarry · Active
- Round Mountain Rock · Intermittent
- Ruby Mine · Active
- S Bar S Quarry · Active
- S-5 Red · Active
- S-6 Red · Active
- S-8 Portable Screen Loader · Temporarily Idled
- Sandvik QE442 Screener · Intermittent
- Sandy Prairie Portable Crusher Plant A · Intermittent
- Santa Fe Aggregates Portable · Intermittent
- Shea Sand & Gravel · Intermittent
- Sheridan Quarry · Active
- Sherwood Rd Quarry · Intermittent
- Sierra Rock Products · Active
- Silva Quarry · Intermittent
- Sixteen To One Mine · NonProducing
- Sloat Quarry · Active
- Soils Plus · Intermittent
- Solari Sand and Gravel · Active
- Soper Pit · Intermittent
- Sousa Ready Mix · Active
- Southside Sand And Gravel · Active
- Sp1 · Intermittent
- Sparrock Pit · Intermittent
- Spring Valley Quarry · Intermittent
- Standish Pit · Intermittent
- State Pit · Intermittent
- Sylmar Site · Active
- Tapo Rock & Sand · Active
- Ten Mile River Plant · Intermittent
- Thousand Palms Pit · Active
- Tidewater Oakland Marine Aggregate · Active
- Troesh Recycling, Inc. dba RoXsand · Active
- TRP Amador Quarry · Intermittent
- Turvey's Granite Pit · Active
- Twin Mine · Intermittent
- Twin Mountain Rock Venture · Active
- Valley Rock Products - Red Bluff Plant · Active
- Valley Rock Products - Willows · Active
- Valley Salt · Active
- Vina Quarry · Intermittent
- Vineyard Rock · Active
- Wahlund Construction, Inc. · Intermittent
- Ward Lake Pit · Intermittent
- Warrior 1800/Cone Crusher FT200 · Intermittent
- Waverly · Active
- West Coast Aggregate Supply Inc · Active
- West Coast Rock and Sand · Active
- Westside Aggregate · Intermittent
- Whale Rock Quarry · Active
- Wheelock Road Rock Pit · Intermittent
- Willow Creek Portable Crusher · Intermittent
- Wilsey Ranch Quarry · Intermittent
- Yosemite Slate Quarry · Intermittent
Source: Mine Safety and Health Administration, Open Government Data