| — | Summers - Taylor Inc | CM391 | Mine contractor | — |
| — | Summers Blasting Co | CCZJ | Mine contractor | — |
| — | Summers Equipment | CB9757 | Mine contractor | — |
| — | Summit Air Systems | CB7955 | Mine contractor | — |
| — | Summit Crane Inc | CA2308 | Mine contractor | — |
| — | Summit Engineering | CTRR | Mine contractor | — |
| — | Summit Engineering Inc | CH3T | Mine contractor | — |
| — | Summit Service Solutions Inc | CC4706 | Mine contractor | — |
| — | Summit Technical Inc | CA3429 | Mine contractor | — |
| — | Sun Coast Resources, Inc. | CA1205 | Mine contractor | — |
| — | Sun Master | CN310 | Mine contractor | — |
| — | Sunbelt Diesel and Power, Inc. | CA4591 | Mine contractor | — |
| — | Sunbelt Rentals Inc. | C4IN | Mine contractor | — |
| — | Sundt Construction Inc | CL0N | Mine contractor | — |
| — | Sunnyfield Contractors, Inc. | CQ945 | Mine contractor | — |
| — | Sunshine Fabrication LLC. | CC9452 | Mine contractor | — |
| — | Sunstate Energy LLC | CJ728 | Mine contractor | — |
| — | Super Ex, LLC | CS392 | Mine contractor | — |
| — | Superior Commercial Concrete, LLC | CM996 | Mine contractor | — |
| — | Superior Contracting LLC | CD0194 | Mine contractor | — |
| — | Superior Crane Inc | CLXJ | Mine contractor | — |
| — | Superior Custom Services Inc. | CA5826 | Mine contractor | — |
| — | Superior Diesel Services, LLC | CC8985 | Mine contractor | — |
| — | Superior Electrical Services, Inc. | CB2653 | Mine contractor | — |
| — | Superior Environmental Solutions, LLC | CB268 | Mine contractor | — |
| — | Superior Fabrication LLC | CC3846 | Mine contractor | — |
| — | Superior Industries | CB471 | Mine contractor | — |
| — | Superior Kiln & Mill Service | C9PJ | Mine contractor | — |
| — | Superior Mining Support | CB6628 | Mine contractor | — |
| — | Superior Rock Bit Company | CXFD | Mine contractor | — |
| — | Suppression Systems Inc. | CB4710 | Mine contractor | — |
| — | Supreme Force Services Inc | CB7646 | Mine contractor | — |
| — | Sure Tech Systems Inc | CZ14 | Mine contractor | — |
| — | Sureflo Techcon USA INC | CC8808 | Mine contractor | — |
| — | Surveyor & Associates Inc | CQXB | Mine contractor | — |
| — | Sutterby Well Drilling | CSRL | Mine contractor | — |
| — | Suulutaaq Inc | CC0366 | Mine contractor | — |
| — | Swaim Contracting, LLC | CC1679 | Mine contractor | — |
| — | Swamp Fox Industrial Solutions | CC3578 | Mine contractor | — |
| — | Swanson Industries | CC9465 | Mine contractor | — |
| — | Swapp Construction Inc | C8AG | Mine contractor | — |
| — | SWCA Environmental Consultants. Inc | CA6791 | Mine contractor | — |
| — | Sweeney Electric, Inc. | CP244 | Mine contractor | — |
| — | Swick Mining Services (USA) | CW155 | Mine contractor | — |
| — | Swift Fire Protection INC | CZ244 | Mine contractor | — |
| — | Switchback Stone, LLC | CC5947 | Mine contractor | — |
| — | SX Blasting | CA4241 | Mine contractor | — |
| — | Sylvamo Ticonderoga Mill | CG997 | Mine contractor | — |
| — | SYNC Aggregate | CC3366 | Mine contractor | — |
| — | Syncore Integrations LLC | CB4399 | Mine contractor | — |
| — | Syncore Testing LLC | CC8608 | Mine contractor | — |
| — | Synergy Global Group | CC6297 | Mine contractor | — |
| — | Synergy HR, LLC | CA9822 | Mine contractor | — |
| — | Synterra Corporation | CK136 | Mine contractor | — |
| — | Synthex Organics LLC | CB8933 | Mine contractor | — |
| — | Systech Environmental Corp | CC1X | Mine contractor | — |
| — | Systems Associates, Inc. | CP449 | Mine contractor | — |
| — | Systems Contracting Corporation | CS993 | Mine contractor | — |
| — | Systems Integration Inc | CE795 | Mine contractor | — |
| — | Systems Service Corporation | CB2504 | Mine contractor | — |
| — | T & E Welding Inc. | CR917 | Mine contractor | — |
| — | T & J Core Drilling Inc | CXZT | Mine contractor | — |
| — | T & M Industrial, LLC | CC6664 | Mine contractor | — |
| — | T & M Welding Inc. | CU864 | Mine contractor | — |
| — | T & T | C2HP | Mine contractor | — |
| — | T & T Cranes LLC | CA2286 | Mine contractor | — |
| — | T & W Tire LLC | CB700 | Mine contractor | — |
| — | T B Contractors | CNUY | Mine contractor | — |
| — | T C Mining LLC | CC6354 | Mine contractor | — |
| — | T E Stevens Construction | CYJJ | Mine contractor | — |
| — | T J Pauschert Trucking | C8VN | Mine contractor | — |
| — | T L Margroff Enterprises LLC | CS117 | Mine contractor | — |
| — | T L Welding Inc. | CG159 | Mine contractor | — |
| — | T R Orr Inc | C8TL | Mine contractor | — |
| — | T&C Well & Pump LLC | CC9670 | Mine contractor | — |
| — | T&D Services | CL507 | Mine contractor | — |
| — | T&S CONSTRUCTION SOLUTIONS LLC | CC8097 | Mine contractor | — |
| — | T&T Lawncare Inc | CB5606 | Mine contractor | — |
| — | T&T Truck and Crane Service | CV079 | Mine contractor | — |
| — | T. S. Construction | CD118 | Mine contractor | — |
| — | T.G. McCauley, Inc. | CM693 | Mine contractor | — |
| — | T.M.S.I. | CR439 | Mine contractor | — |
| — | T3 Welding & Equipment Services | CC5867 | Mine contractor | — |
| — | TAFT ENGINEERING INC | CC9606 | Mine contractor | — |
| — | Tahiti Energy Inc. | CA1365 | Mine contractor | — |
| — | TAKRAF USA | CA1360 | Mine contractor | — |
| — | Talley Construction Company Inc | CC6962 | Mine contractor | — |
| — | Tamarack Geological Services | CC4316 | Mine contractor | — |
| — | Tameron's Plumbing & Septic Service | CA6911 | Mine contractor | — |
| — | Tandem Enterprises, LLC | CCIR | Mine contractor | — |
| — | Tangi Aggregates, llc | CB5753 | Mine contractor | — |
| — | Tangipahoa Parish Landfill | CB7479 | Mine contractor | — |
| — | Tanguay Stone Worx | CC8650 | Mine contractor | — |
| — | Tank Connection, LLC | CB2728 | Mine contractor | — |
| — | Target Drilling Inc. | CUTN | Mine contractor | — |
| — | Tarheel Sand & Stone Inc. | CB2484 | Mine contractor | — |
| — | Tarmac International, Inc. | CB8047 | Mine contractor | — |
| — | Tarsco Bolted Tank, Inc. | C5DH | Mine contractor | — |
| — | Tas Environmental | CA1332 | Mine contractor | — |
| — | TAS Inc | CC4907 | Mine contractor | — |
| — | TASSCO | CB7018 | Mine contractor | — |
| — | Tate Engineering Sytems Inc. | CA3432 | Mine contractor | — |
| — | Tavares Concrete Co Inc | CW482 | Mine contractor | — |
| — | Taylor and Sons Ground Breaking LLC | CC9235 | Mine contractor | — |
| — | Taylor Brothers LLC | CC7509 | Mine contractor | — |
| — | Taylor Crane & Rigging, Inc. | CF623 | Mine contractor | — |
| — | Taylor Electrical Company LLC | CC8213 | Mine contractor | — |
| — | TAYLOR ELECTRICAL CONTRACTORS INC. | CP347 | Mine contractor | — |
| — | TAYLOR ENGINEERING LLC | CA3806 | Mine contractor | — |
| — | Taylor Made Iron Services | CG067 | Mine contractor | — |
| — | Taylor Northeast | CC3798 | Mine contractor | — |
| — | Taylor Transport Inc. | CA7618 | Mine contractor | — |
| — | Taylor's Safety Consulting and Training | CA7599 | Mine contractor | — |
| — | Tazewell Mining Supply & Equipment, Inc. | CSHX | Mine contractor | — |
| — | Tazz Conveyor Corp | CA3315 | Mine contractor | — |
| — | TB Equipment Repair, LLC | CC3654 | Mine contractor | — |
| — | TC Construction Specialists | CS556 | Mine contractor | — |
| — | TC Mobile Welding & Fabrication | CC0344 | Mine contractor | — |
| — | TC Randal Construction LLC | CC6594 | Mine contractor | — |
| — | TCB Oilfield Services, LLC. | CB4894 | Mine contractor | — |
| — | TCF Equipment and Welding | CB8786 | Mine contractor | — |
| — | TDK Comfort Systems, Inc. | CB0326 | Mine contractor | — |
| — | TDK Consulting Inc | CY217 | Mine contractor | — |
| — | TDK Trucking | CG088 | Mine contractor | — |
| — | TDM Leasing, Ltd | CC7714 | Mine contractor | — |
| — | Teachout's Industrial Contracting, Inc. | CC9641 | Mine contractor | — |
| — | TEAM B Electrik, LLC | CB6129 | Mine contractor | — |
| — | Team Elmers | CS737 | Mine contractor | — |
| — | Team Nelson Earthworks & Utilities, Inc. | CB4507 | Mine contractor | — |
| — | TEAM STAFFING SOLUTIONS LLC | CC6757 | Mine contractor | — |
| — | TEAMWORKnet, Inc. | CB5004 | Mine contractor | — |
| — | TECH-FLOW ENGINEERED PROCESS SOLUTIONS | CB2687 | Mine contractor | — |
| — | TechCity Electric LLC | CC7389 | Mine contractor | — |
| — | Techline Alaska LLC dba Techline Mining | CC3251 | Mine contractor | — |
| — | Technical Compliance Solutions LLC | CB1793 | Mine contractor | — |
| — | Technique Roofing | CC8122 | Mine contractor | — |
| — | TECHNOCEMS | CC9743 | Mine contractor | — |
| — | Technos Corp | CLAH | Mine contractor | — |
| — | TECK Industrial | CC8637 | Mine contractor | — |
| — | TECO-Westinghouse Motor Co | CA3092 | Mine contractor | — |
| — | Teevin Brothers Land & Timber Company | CW094 | Mine contractor | — |
| — | Teichert Aggregates | CG187 | Mine contractor | — |
| — | Tekran Instruments | CZ031 | Mine contractor | — |
| — | TekSolv Inc | CC8021 | Mine contractor | — |
| — | Telesto Solutions Inc | CB744 | Mine contractor | — |
| — | TEMA Isenmann,Inc | CT696 | Mine contractor | — |
| — | Ten Peaks Consulting Ltd | CB3207 | Mine contractor | — |
| — | Tencarva Machinery Company | CJ857 | Mine contractor | — |
| — | Tennant Sales and Service Company | CT854 | Mine contractor | — |
| — | Tennessee Associated Electric, LLC | CRWX | Mine contractor | — |
| — | Tennessee Mine Safety Services LLC | CV800 | Mine contractor | — |
| — | Tennessee Roofing & Construction, Inc | CA0896 | Mine contractor | — |
| — | Tennessen & Associates, Inc. | CM828 | Mine contractor | — |
| — | Tercek Electric, Inc. | CA8371 | Mine contractor | — |
| — | Terminix Service Inc | CC5122 | Mine contractor | — |
| — | Terra Nova Technologies, Inc. | CG914 | Mine contractor | — |
| — | Terra Structures | CS649 | Mine contractor | — |
| — | Terra-Gen Power Operating Company | CA3472 | Mine contractor | — |
| — | Terracon Consultants, Inc | CM325 | Mine contractor | — |
| — | Terracore Materials, LLC | CC7093 | Mine contractor | — |
| — | Terre Hill Concrete Products | CY491 | Mine contractor | — |
| — | Terrell Automotive | CC9273 | Mine contractor | — |
| — | Terry Brandl Welding Inc | CC3989 | Mine contractor | — |
| — | Terry's Pumpin & Potties, Inc. | CW712 | Mine contractor | — |
| — | Tesone Transport Inc | CXUS | Mine contractor | — |
| — | Testco LLC | CC8746 | Mine contractor | — |
| — | Teter Landscaping | CC3505 | Mine contractor | — |
| — | Tetra Tech | CXQQ | Mine contractor | — |
| — | Teverbaugh Equipment, Inc. | CB3330 | Mine contractor | — |
| — | Tex Mex Welding | CC1784 | Mine contractor | — |
| — | Texas Coated Sand, LLC | CC2899 | Mine contractor | — |
| — | Texas Locomotive Solutions, Inc. | CB3795 | Mine contractor | — |
| — | Texas Reexcavation | CC1945 | Mine contractor | — |
| — | Texas Sports Sands | CC1669 | Mine contractor | — |
| — | TFM, LLC | CC7712 | Mine contractor | — |
| — | TFX EQUIPMENT SERVICE | CE019 | Mine contractor | — |
| — | TGK Plumbing | CC7187 | Mine contractor | — |
| — | Thalle Construction Company | CB6380 | Mine contractor | — |
| — | Thaman Rubber Company | CN282 | Mine contractor | — |
| — | Thatcher Transportation, Inc. | CB4672 | Mine contractor | — |
| — | The 84 Group, Inc. | CA3244 | Mine contractor | — |
| — | The Bauer Company, Inc. | CL322 | Mine contractor | — |
| — | The Case Company of SC, LLC | CC6323 | Mine contractor | — |
| — | The Clean Team, LLC | CC6068 | Mine contractor | — |
| — | The Conrad Company | CC4782 | Mine contractor | — |
| — | The EI Group, Inc. | CA1065 | Mine contractor | — |
| — | The Erosion Company | CB1710 | Mine contractor | — |
| — | The Esco Group | CK817 | Mine contractor | — |
| — | The GEL Group, Inc | CA4172 | Mine contractor | — |
| — | The Hardscape Center, LLC | CC7836 | Mine contractor | — |
| — | The Harrod Group | CA6686 | Mine contractor | — |
| — | The Henry Carlson Construction LLC | CN498 | Mine contractor | — |
| — | The Hiller Companies LLC | CQPL | Mine contractor | — |
| — | The Iron Doctor Inc | C8PA | Mine contractor | — |
| — | The Jamar Company | CC6S | Mine contractor | — |
| — | The Jamar Company DBA Industrial Contractors, Inc | CJ03 | Mine contractor | — |
| — | The Line Boring & Welding Co | CC0198 | Mine contractor | — |
| — | The McLean Company | CC3535 | Mine contractor | — |
| — | The McPherson Companies Inc. | CY240 | Mine contractor | — |
| — | The Mouat Company, Inc. | CA6007 | Mine contractor | — |
| — | The Powderman LLC | CA7778 | Mine contractor | — |
| — | The Powers Company | CC7978 | Mine contractor | — |
| — | The Safety Management Group | CB0145 | Mine contractor | — |
| — | The Stripling Company | CC4311 | Mine contractor | — |
| — | The Third Element Inc. | CB4048 | Mine contractor | — |
| — | The Timken Company | CA1761 | Mine contractor | — |
| — | The Tri-M Group, LLC | CB226 | Mine contractor | — |
| — | The W. I. Clark Company | CZ280 | Mine contractor | — |
| — | Thermal Energy Engineering Company | CC4977 | Mine contractor | — |
| — | Thermal Solutions Inc. | CB1125 | Mine contractor | — |
| — | Thermo Fluids Inc | CYSF | Mine contractor | — |
| — | Thermo Gamma-Metrics | CIHG | Mine contractor | — |
| — | THERMOGRAPHY & ULTRASOUND DIAGNOSTICS, INC. | CH286 | Mine contractor | — |
| — | THIESS MINING USA INC | CC2682 | Mine contractor | — |
| — | Thomas Crushing, LLC. | CB5112 | Mine contractor | — |
| — | Thomas Electric, Inc. | CZ365 | Mine contractor | — |
| — | Thomas Energy Systems Corp | CB985 | Mine contractor | — |
| — | Thomas H. Clingan Electrical Services, LLC | CA2075 | Mine contractor | — |
| — | Thomas Industrial and Mechanical Constructors, LLC | CC8438 | Mine contractor | — |
| — | Thomas Petroleum, LLC | CA2612 | Mine contractor | — |
| — | Thomas Repair | CA5890 | Mine contractor | — |
| — | THOMPSON & SONS TRUCKING LLC | CC8443 | Mine contractor | — |
| — | Thompson Tractor Company, Inc | CDL2 | Mine contractor | — |
| — | Thornton Welding and Machine, Inc | CZ697 | Mine contractor | — |
| — | Thorpe Specialty Services | CS1A | Mine contractor | — |
| — | Three-D Drilling Inc. | C7VV | Mine contractor | — |
| — | Thunder Industries Inc | CC653 | Mine contractor | — |
| — | Thurman Transportation Inc | CC200 | Mine contractor | — |
| — | Thyssen Mining Inc | CNEV | Mine contractor | — |
| — | ThyssenKrupp Industrial Solutions (USA) | CZAL | Mine contractor | — |
| — | Tian Reclamation | C8EG | Mine contractor | — |
| — | TIC-The Industrial Company | CK48 | Mine contractor | — |
| — | Tide Consulting Services | CC7249 | Mine contractor | — |
| — | Tiefenbach North America, LLC | CN918 | Mine contractor | — |
| — | Tierra Group International, Ltd. | CA4419 | Mine contractor | — |
| — | Tifco Industries | CA418 | Mine contractor | — |
| — | Tiffany Construction Co | CN0E | Mine contractor | — |
| — | Tight Line Service Inc | CC890 | Mine contractor | — |
| — | Tilt Industrial Services | CC3347 | Mine contractor | — |
| — | Tim Buzzo Trucking | CB786 | Mine contractor | — |
| — | Tim Guzzy Services Inc. | CB0179 | Mine contractor | — |
| — | Tim J. DeLine Quarry Drilling LLC | CT106 | Mine contractor | — |
| — | Timber Roads, Inc. | CC7910 | Mine contractor | — |
| — | Timberland Maintenance Services, LLC. | CT878 | Mine contractor | — |
| — | Timberline Drilling Inc. | CW152 | Mine contractor | — |
| — | Tindle Construction, Inc. | C3KV | Mine contractor | — |
| — | Tios Welding | CC2830 | Mine contractor | — |
| — | TIPON ELECTRIC INC | CE871 | Mine contractor | — |
| — | Tire Den Inc. | CE484 | Mine contractor | — |
| — | Tire Related Services | CN021 | Mine contractor | — |
| — | Tisdale Creek Ranch Inc. | CT127 | Mine contractor | — |
| — | Tisler Trucking & Excavating, LLC. | CC2878 | Mine contractor | — |
| — | Tison and Hall Concrete Products Co., Inc. | CA0009 | Mine contractor | — |
| — | Titan Engineering and Construction | CA6390 | Mine contractor | — |
| — | Titan Equipment Repair LLC | CC3956 | Mine contractor | — |
| — | Titan Machinery, Inc. | CG576 | Mine contractor | — |
| — | Titan Service and Equipment Repair, LLC | CC6299 | Mine contractor | — |
| — | Titan Truck & Equipment Company, LLC | CC2863 | Mine contractor | — |
| — | TJ Oilfield Services, LLC | CB1966 | Mine contractor | — |
| — | TJR Services | CC5577 | Mine contractor | — |
| — | TJS Welding | CS315 | Mine contractor | — |
| — | TKO Equipment Co. | CF636 | Mine contractor | — |
| — | TM Crane Service, LLC | CA4760 | Mine contractor | — |
| — | TM Crowley & Associates | CC8973 | Mine contractor | — |
| — | TM Iron Group LLC | CC3577 | Mine contractor | — |
| — | TML Construction, Inc. | CZ792 | Mine contractor | — |
| — | TMT Solutions | CB0765 | Mine contractor | — |
| — | TNT Construction Group LLC | CC5048 | Mine contractor | — |
| — | TNT Crane & Riggings | C9IM | Mine contractor | — |
| — | TNT Hauling, INC | CC0986 | Mine contractor | — |
| — | TNT Services Corp | CB1622 | Mine contractor | — |
| — | TNT Welding, LLC | CB4600 | Mine contractor | — |
| — | Todd Case Trucking | CDMD | Mine contractor | — |
| — | Toledo Carolina, Inc. | CB4476 | Mine contractor | — |
| — | TOLLIVER TRANSPORT | CC2729 | Mine contractor | — |
| — | Tolson and Associates, LLC | CB1697 | Mine contractor | — |
| — | Tom Cook Construction Inc | CWNM | Mine contractor | — |
| — | Tom Roe & Son Construction Inc | C9PC | Mine contractor | — |
| — | Tom's Construction, Inc. | CB1537 | Mine contractor | — |
| — | Tom's Hot Shot Service | CY840 | Mine contractor | — |
| — | Tomah Environmental Contractors | CA5448 | Mine contractor | — |
| — | Tomahawk Construction, LLC | CA9027 | Mine contractor | — |
| — | Tommy Bramer & Son | C1WB | Mine contractor | — |
| — | Tommy Roberts Trucking, Inc. | CH610 | Mine contractor | — |
| — | TOMS DIESEL SERVICE | CB3252 | Mine contractor | — |
| — | Tonatec Exploration, LLC | CR943 | Mine contractor | — |
| — | Tons Per Hour Inc | CE394 | Mine contractor | — |
| — | Top Notch Services Inc | CZXD | Mine contractor | — |
| — | Torch Industrial Services LLC | CB7014 | Mine contractor | — |
| — | Torgersen Earthmoving, Inc, | CRY3 | Mine contractor | — |
| — | Total Electric Co | CY1U | Mine contractor | — |
| — | Total Maintenance Solutions Inc. | CY847 | Mine contractor | — |
| — | Total Power Systems, LLC | CC3645 | Mine contractor | — |
| — | Total Welding and Fabrication | CB6793 | Mine contractor | — |
| — | Tower Rock Stone Co. | CB1467 | Mine contractor | — |
| — | Tower Systems, Inc. | CC7239 | Mine contractor | — |
| — | Towlift Inc. | CB3688 | Mine contractor | — |
| — | Town of Cohocton Highway Dept. | CX384 | Mine contractor | — |
| — | Town of Orwell | CE597 | Mine contractor | — |
| — | Toyota Material Handling of Tennessee | CC0527 | Mine contractor | — |