| — | American Tire Inc | CKPQ | Mine contractor | — |
| — | American Tire Inc | CA6823 | Mine contractor | — |
| — | American Track, LLC | CX716 | Mine contractor | — |
| — | Americrane | CB5194 | Mine contractor | — |
| — | Amerikohl Transport | CA4691 | Mine contractor | — |
| — | Amerimex USA, Incorporated | CA169 | Mine contractor | — |
| — | Ames Construction Inc | CU82 | Mine contractor | — |
| — | AMF Electrical Contractors, Inc. | CA1350 | Mine contractor | — |
| — | Amicus Contracting Service Inc. | CC8526 | Mine contractor | — |
| — | AMP Mechanical, LLC | CC4534 | Mine contractor | — |
| — | AMPCO Contracting, Inc. | CC9655 | Mine contractor | — |
| — | Amptek Inc. | CA6056 | Mine contractor | — |
| — | AN Martin Systems LLC | CC9538 | Mine contractor | — |
| — | Anacapa Engineering and Design, Inc. | CC7332 | Mine contractor | — |
| — | Anchor Air Conditioning of Central Florida, Inc. | CV029 | Mine contractor | — |
| — | Anchor Door Systems of Lake Norman, Inc. | CC6228 | Mine contractor | — |
| — | Ancon Marine | CQXY | Mine contractor | — |
| — | Anderson Butte Quarry LLC | CB7949 | Mine contractor | — |
| — | Anderson Electric, Inc. | CA6330 | Mine contractor | — |
| — | Anderson Equip Co | CBB5 | Mine contractor | — |
| — | Anderson Excavating, LLC | CF615 | Mine contractor | — |
| — | Anderson's Nu-power Construction | C5RI | Mine contractor | — |
| — | Andress Engineering Associates, Inc. | CH494 | Mine contractor | — |
| — | Andrews Construction Company, Inc. | CB1117 | Mine contractor | — |
| — | Andrews Engineering, Inc. | CY944 | Mine contractor | — |
| — | Andrews Mechanical Inc | CS197 | Mine contractor | — |
| — | Andrie Electric Ltd | CVEM | Mine contractor | — |
| — | Andritz Automation Ltd. | CD072 | Mine contractor | — |
| — | Andy's Excavating and Repair | CC8313 | Mine contractor | — |
| — | Anglemyer Crane | CC1522 | Mine contractor | — |
| — | Anson Excavating & Pipe Inc | C8RN | Mine contractor | — |
| — | Antelope County | CB0345 | Mine contractor | — |
| — | Antelope Valley Tire | CA1458 | Mine contractor | — |
| — | ANTHONY SCALE SERVICE AND MEASURING | CC7822 | Mine contractor | — |
| — | ANVIL SOLUTIONS, LLC | CC9318 | Mine contractor | — |
| — | AP Insulation Inc | CC1531 | Mine contractor | — |
| — | APAC-Atlantic, Inc. -Thompson-Arthur Div. | CE869 | Mine contractor | — |
| — | Apache Industrial Services | CA5440 | Mine contractor | — |
| — | Apex Companies, LLC | CL815 | Mine contractor | — |
| — | Apex Electric LLC | CC1026 | Mine contractor | — |
| — | Apex Fence Company | CC7831 | Mine contractor | — |
| — | Apex Gear Service, Inc. | CC7969 | Mine contractor | — |
| — | Apex Heating and Cooling | CA4680 | Mine contractor | — |
| — | Apex industrial | CC7496 | Mine contractor | — |
| — | Apex Industrial Electric | CC6818 | Mine contractor | — |
| — | Apex Industrial Facility Services | CC2188 | Mine contractor | — |
| — | Apex Paving Company | CY230 | Mine contractor | — |
| — | Apex Rockfall Mitigation LLC | CB4545 | Mine contractor | — |
| — | Apex Solutions LLC | CB7995 | Mine contractor | — |
| — | Apex Welding Services LLC | CC6104 | Mine contractor | — |
| — | Appalachia Earthworks LLC | CC2593 | Mine contractor | — |
| — | Appalachia Explosives, LLC | CB9634 | Mine contractor | — |
| — | Appalachian Laboratories | CESJ | Mine contractor | — |
| — | Appalachian Mining & Engineering, Inc. | CJ946 | Mine contractor | — |
| — | Appalachian Mining Rebuilds and Equipment LLC | CC6972 | Mine contractor | — |
| — | Appalachian Security Inc. | CR016 | Mine contractor | — |
| — | Appalachian Technical Serv Inc | C3RN | Mine contractor | — |
| — | Appalachian Welding Service | CC7403 | Mine contractor | — |
| — | Appalachian Well Surveys, Inc. | CA4216 | Mine contractor | — |
| — | Apple Valley Scale Company | C5GJ | Mine contractor | — |
| — | Applied Aquatic Management | CP820 | Mine contractor | — |
| — | Applied Conveyor Technology | CNPN | Mine contractor | — |
| — | Applied Energies, LLC. | C2KH | Mine contractor | — |
| — | Applied Hydrologic LTD | CC8940 | Mine contractor | — |
| — | Applied Industrial Technologies | C9EI | Mine contractor | — |
| — | AQUA POWER INC. | CH040 | Mine contractor | — |
| — | Aquamatrix Inc | CC040 | Mine contractor | — |
| — | Aquatech International, LLC | CC7636 | Mine contractor | — |
| — | Aquatic Resource Restoration Company | CJ564 | Mine contractor | — |
| — | Aquilex HydroChem, Inc. | CWVT | Mine contractor | — |
| — | Aquionix, Inc. | CA1151 | Mine contractor | — |
| — | Aracoma Coal Company, Inc | CZ091 | Mine contractor | — |
| — | Aratay Incorporated DBA Sabia | C4FJ | Mine contractor | — |
| — | Arc Electric Inc | CS1U | Mine contractor | — |
| — | Arc Works Inc | CA232 | Mine contractor | — |
| — | ARCADIS U.S. Inc | CE933 | Mine contractor | — |
| — | Arcilla Mining & Land Co | CUGL | Mine contractor | — |
| — | Ardaman & Associates Inc | C2UV | Mine contractor | — |
| — | Ardent Services LLC | CE632 | Mine contractor | — |
| — | Aring Equipment | CJ712 | Mine contractor | — |
| — | Arion Construction Services LLC | CC6727 | Mine contractor | — |
| — | Arizona Boiler Co Inc | CD0110 | Mine contractor | — |
| — | Arizona Complete Glass Services | CX960 | Mine contractor | — |
| — | Arizona Design & Construction Company, LLC | CC7199 | Mine contractor | — |
| — | Arizona Electrical Apparatus | CU435 | Mine contractor | — |
| — | Arizona Elevator Solutions | CC6753 | Mine contractor | — |
| — | Arizona Equipment and Fabrication LLC | CE615 | Mine contractor | — |
| — | Arizona Geophysical Surveys LLC dba SWEXP | CK837 | Mine contractor | — |
| — | Arizona Ice King | CC0286 | Mine contractor | — |
| — | Arkansas Sand | CA9040 | Mine contractor | — |
| — | Arm Camco LLC | CB9213 | Mine contractor | — |
| — | ARM Group Inc. | CB2916 | Mine contractor | — |
| — | ARM Services, LLC | CB8167 | Mine contractor | — |
| — | Armada Logistics, LLC | CC0246 | Mine contractor | — |
| — | ARMBOW Demolition Services, LLC | CC9959 | Mine contractor | — |
| — | Arms Trucking Co | CM572 | Mine contractor | — |
| — | Arnold Fabricating & Mach Inc | C9BE | Mine contractor | — |
| — | Arnold Machinery Co | CFN4 | Mine contractor | — |
| — | Arnold S Jaudon | CW660 | Mine contractor | — |
| — | Array Foundation Services, LLC | CC9414 | Mine contractor | — |
| — | Arrow Electric Co., Inc. | CK454 | Mine contractor | — |
| — | Arrow Infrastructure Solutions, Inc. | CC2462 | Mine contractor | — |
| — | Arrowood supply | CC8290 | Mine contractor | — |
| — | ARS Inc. | CE598 | Mine contractor | — |
| — | Art's Electric Co. | CRUG | Mine contractor | — |
| — | Articulated Services, Inc. | CE176 | Mine contractor | — |
| — | Artisan | CC7612 | Mine contractor | — |
| — | Asbill Electric Service Inc | CGKT | Mine contractor | — |
| — | Ascendum Machinery, Inc. | CA321 | Mine contractor | — |
| — | ASCI, Inc. | CC2981 | Mine contractor | — |
| — | Asero Enterprises Inc | C7FQ | Mine contractor | — |
| — | asero welding inc | CC6143 | Mine contractor | — |
| — | ASF Inc | CC0395 | Mine contractor | — |
| — | Asgco Mfg Inc | CY4N | Mine contractor | — |
| — | Ash Resources, Inc. | CR082 | Mine contractor | — |
| — | Ashton Company Inc | CW68 | Mine contractor | — |
| — | ASL Construction Inc. | CC8462 | Mine contractor | — |
| — | Aspen Communications | CA5967 | Mine contractor | — |
| — | Asset Protection Solutions LLC | CC4511 | Mine contractor | — |
| — | AssetWatch, Inc. | CC2110 | Mine contractor | — |
| — | Associated Engineers Inc | CLVN | Mine contractor | — |
| — | Associated Rail Road Contractors, Inc. | CQ535 | Mine contractor | — |
| — | associated sheet metal | CS373 | Mine contractor | — |
| — | Associated Terminals, L.L.C. | CE075 | Mine contractor | — |
| — | Assured Integration, LLC | CB6228 | Mine contractor | — |
| — | Atkins Service Systems LLC | CA2899 | Mine contractor | — |
| — | ATLANTIC AGGREGATES CRUSHING & RECYCLING LLC | CL458 | Mine contractor | — |
| — | Atlantic Compressors Inc | CW685 | Mine contractor | — |
| — | Atlantic Contracting & Material Co, Inc. | CR849 | Mine contractor | — |
| — | Atlantic Forklift Services | CC2333 | Mine contractor | — |
| — | Atlantic Health & Safety | CC8913 | Mine contractor | — |
| — | Atlantic Heavy Repair LLC | CB6493 | Mine contractor | — |
| — | Atlantis Equipment Corp | CHKC | Mine contractor | — |
| — | Atlas Copco Compressors, LLC | CA3320 | Mine contractor | — |
| — | Atlas Crane | CC8193 | Mine contractor | — |
| — | Atlas Equipment Services | CP862 | Mine contractor | — |
| — | Atlas Foundation co., LLC | CB8248 | Mine contractor | — |
| — | Atlas Machine & Supply | CAUI | Mine contractor | — |
| — | Atlas Machining & Welding Inc | CPGD | Mine contractor | — |
| — | Atlas Towing Service | CTXX | Mine contractor | — |
| — | ATS Construction | CA2476 | Mine contractor | — |
| — | August Winter & Sons Inc. | CW178 | Mine contractor | — |
| — | Aumund Corporation | CR534 | Mine contractor | — |
| — | Aurora Mantua Electric Inc. | CA4656 | Mine contractor | — |
| — | Ausenco Engineering USA South Inc. | CB9745 | Mine contractor | — |
| — | Austin Crane Service | CH579 | Mine contractor | — |
| — | Austin Powder Appalachia LLC | CB5236 | Mine contractor | — |
| — | Austin Powder Central States LLC | CB5135 | Mine contractor | — |
| — | Austin Powder Company | CE24 | Mine contractor | — |
| — | Austin Powder Great Lakes LLC | CB5136 | Mine contractor | — |
| — | Austin Powder Mid-Atlantic LLC | CC2483 | Mine contractor | — |
| — | Austin Powder Midsouth LLC | CB5137 | Mine contractor | — |
| — | Austin Powder North Central LLC | CVK8 | Mine contractor | — |
| — | Austin Powder Northeast LLC | CB5138 | Mine contractor | — |
| — | Austin Powder South Central LLC | CB8403 | Mine contractor | — |
| — | Austin Powder Southeast LLC | CB5139 | Mine contractor | — |
| — | Austin Powder West LLC | CB5140 | Mine contractor | — |
| — | Austin Sales, LLC | CF278 | Mine contractor | — |
| — | Authentic Drilling, LLC | CB1552 | Mine contractor | — |
| — | Authorized Electric AEC LLC. | CC5301 | Mine contractor | — |
| — | Autologic LLC | CJ754 | Mine contractor | — |
| — | Automated Control Solutions, LLC | CB6786 | Mine contractor | — |
| — | Automated Scale Corporation | CA2599 | Mine contractor | — |
| — | Automatic Fire Protection, LLC | CC9688 | Mine contractor | — |
| — | Automatic Fire Systems Of Augusta,LLC | CA2910 | Mine contractor | — |
| — | Automation & Electronics Inc | CEU2 | Mine contractor | — |
| — | Automation and Controls Specialists | CA5352 | Mine contractor | — |
| — | Automation Power & Controls, LLC | CA4565 | Mine contractor | — |
| — | Automation Services, Inc. | CR473 | Mine contractor | — |
| — | AVB Welding, LLC | CC6042 | Mine contractor | — |
| — | Aviator Paving Company Charlotte LLC | CC5080 | Mine contractor | — |
| — | AVIS ELECTRIC CO. | CE579 | Mine contractor | — |
| — | AW Hunt Construction Inc | CA982 | Mine contractor | — |
| — | AWF, lll | CC2090 | Mine contractor | — |
| — | AWT North America, LLC. | CC3916 | Mine contractor | — |
| — | Axis Engineering Group LLC | CB2190 | Mine contractor | — |
| — | Axis Fire and Safety, LLC | CA8158 | Mine contractor | — |
| — | B & B Electric Inc. | CA1346 | Mine contractor | — |
| — | B & B ELECTRICAL CONTRACTORS, LLC | CE139 | Mine contractor | — |
| — | B & D Industrial | CY007 | Mine contractor | — |
| — | B & D Trucking | CZ840 | Mine contractor | — |
| — | B & G Welding | CA602 | Mine contractor | — |
| — | B & H Transfer Company | CPEU | Mine contractor | — |
| — | B & J Trucking Co | CFBF | Mine contractor | — |
| — | B & K Electrical Cont Inc | CGXT | Mine contractor | — |
| — | B & R Parts LLC | CB5839 | Mine contractor | — |
| — | B & T Mineral | CJUC | Mine contractor | — |
| — | B & T Scale Co | C8VG | Mine contractor | — |
| — | B and J Repair | CC8037 | Mine contractor | — |
| — | B Cumbee,LLC. | CC4436 | Mine contractor | — |
| — | B E Davis Trucking, LLC. | CUNP | Mine contractor | — |
| — | B F Construction Inc | CB3339 | Mine contractor | — |
| — | B J Baldwin Electric Inc | CGH5 | Mine contractor | — |
| — | B J Cecil Trucking Inc | CSD5 | Mine contractor | — |
| — | B K Edwards Welding & Fab Inc | CB120 | Mine contractor | — |
| — | B L Harbert International, LLC | CZDD | Mine contractor | — |
| — | B R C Trucking | CC419 | Mine contractor | — |
| — | B T S | C8CK | Mine contractor | — |
| — | B&A Construction | CC8947 | Mine contractor | — |
| — | B&A MOBILE MECHANICS | CC4591 | Mine contractor | — |
| — | B&B Electrical Systems LLC | CB5348 | Mine contractor | — |
| — | B&B Steel Erection Co., Inc. | CZ461 | Mine contractor | — |
| — | B&D Telecom Inc. | CA9900 | Mine contractor | — |
| — | B&J Excavating, Inc. | CX358 | Mine contractor | — |
| — | B&N Welding & Fabrication, Inc. | CD615 | Mine contractor | — |
| — | B&S Site Development | CC9497 | Mine contractor | — |
| — | B+E DIMENSIONAL STONE | CB8130 | Mine contractor | — |
| — | B. A. Martin Certified Welding, LLC | CC7503 | Mine contractor | — |
| — | B. H. Inc. | CX712 | Mine contractor | — |
| — | B.E.S.T. Electric, Inc. | CC0262 | Mine contractor | — |
| — | B.L. Electricals, Inc | CA0541 | Mine contractor | — |
| — | B3earthworks | CC4594 | Mine contractor | — |
| — | Babcock | CC8352 | Mine contractor | — |
| — | BABCOCK & WILCOX POWER GENERATION GROUP, INC. | CA8648 | Mine contractor | — |
| — | Back Water Environmental | CZ917 | Mine contractor | — |
| — | Backcountry Drilling LLC | CC1344 | Mine contractor | — |
| — | Badger Daylighting Corp | CY032 | Mine contractor | — |
| — | Bagby Elevator Co Inc | CN0M | Mine contractor | — |
| — | Baghouse & Industrial Sheet Metal Services Inc | CG431 | Mine contractor | — |
| — | Bahnson Mechanical Systems | CA6787 | Mine contractor | — |
| — | BAI Group Inc. | CB0407 | Mine contractor | — |
| — | Bailey Heavy Equipment Repair | CC5425 | Mine contractor | — |
| — | Bailey Machine Company | CUMH | Mine contractor | — |
| — | Baker Grading & Landscaping, Inc. | CK182 | Mine contractor | — |
| — | Baker's Construction and Excavation | CA3164 | Mine contractor | — |
| — | Baker's Septic Services, Inc. | CD778 | Mine contractor | — |
| — | Baker'S Welding | C5DB | Mine contractor | — |
| — | Baker's Welding & Crane Service | CJ004 | Mine contractor | — |
| — | Balanced Systems Industries LLC | CC5319 | Mine contractor | — |
| — | Baldwin & Son LLC | CC6617 | Mine contractor | — |
| — | Baldwin Supply | CT124 | Mine contractor | — |
| — | Baldy Electric, Inc. | CC7595 | Mine contractor | — |
| — | Baldy Utility Company, Inc. | CC7594 | Mine contractor | — |
| — | Balfour Beatty Infrastructure Inc | CE809 | Mine contractor | — |
| — | Balfour Beatty Infrastructure Inc. | CA7019 | Mine contractor | — |
| — | Ball Contractors Inc | CB9051 | Mine contractor | — |
| — | Ballard Trucking LLC | C1QH | Mine contractor | — |
| — | Ballistic Mine Development | CC4712 | Mine contractor | — |
| — | Baltimore Hydraulics, Inc. | CS333 | Mine contractor | — |
| — | Banlaw North America, LLC | CA5423 | Mine contractor | — |
| — | Bannister Electrical Solutions LLC | CB3699 | Mine contractor | — |
| — | Bar T Equipment Service, Inc. | CR552 | Mine contractor | — |
| — | Barakat Associates Ltd | CSVX | Mine contractor | — |
| — | Barcon, Inc | CC2281 | Mine contractor | — |
| — | Barhite Excavating | CB682 | Mine contractor | — |
| — | Barion LLC | CC9094 | Mine contractor | — |
| — | Barker and Associates | CJ782 | Mine contractor | — |
| — | Barksdale Contracting & Supply, Inc. | CB730 | Mine contractor | — |
| — | Barminco Mining Services USA LLC | CC7034 | Mine contractor | — |
| — | Barnes Electrical Service Tech | CB6803 | Mine contractor | — |
| — | Barnett Southern Corporation | CZ865 | Mine contractor | — |
| — | Barney Trucking Inc | CQ37 | Mine contractor | — |
| — | Barnhart Crane and Rigging Company | CA481 | Mine contractor | — |
| — | Baroid Industrial Drilling Products | CQ066 | Mine contractor | — |
| — | Barr Engineering Co | CKZ8 | Mine contractor | — |
| — | Barrett machine | CA1987 | Mine contractor | — |
| — | Barrett Paving Materials Inc - MWC | CX823 | Mine contractor | — |
| — | Bartels Drilling, Inc. | CXTC | Mine contractor | — |
| — | BARTH A/C SERVICE | CB3792 | Mine contractor | — |
| — | Baseline Contracting, Inc. | CG446 | Mine contractor | — |
| — | BASF Corporation | C6BI | Mine contractor | — |
| — | Basin Industrial Solutions, LLC | CC1297 | Mine contractor | — |
| — | BasinWells Associates PLLC | CZ459 | Mine contractor | — |
| — | Bass Crane Services | CRVF | Mine contractor | — |
| — | Bass Mobile Repair & Welding, LLC | CC9667 | Mine contractor | — |
| — | Battle Born Ventures, LLC | CA4276 | Mine contractor | — |
| — | Bauer Built Tire Inc | CA591 | Mine contractor | — |
| — | Baumgardner Enterprises, Inc. | CV593 | Mine contractor | — |
| — | Baxter Trucking Inc | C7MK | Mine contractor | — |
| — | Bay Area/General Crane Service Co. | CA1182 | Mine contractor | — |
| — | Bay Crane Service Inc. | CC4245 | Mine contractor | — |
| — | Bay shore essentiel systems | CA6694 | Mine contractor | — |
| — | BAYAMON AGGREGATES & RECYCLING INC | CC9052 | Mine contractor | — |
| — | Bayliss Machine & Welding Co | CSV8 | Mine contractor | — |
| — | Bayshore Electric | C8XB | Mine contractor | — |
| — | Baysinger Trucking, Inc. | CT263 | Mine contractor | — |
| — | BBA Inc | CC5990 | Mine contractor | — |
| — | BBU Services of WV LLC | CR656 | Mine contractor | — |
| — | BC SAUDER, INC | CC1283 | Mine contractor | — |
| — | BCH Industries, LLC | CA2785 | Mine contractor | — |
| — | BDC Inc | CA6623 | Mine contractor | — |
| — | BEAM'S CONTRACTING, INC. | CA4909 | Mine contractor | — |
| — | Bear River Electric LLC | CR672 | Mine contractor | — |
| — | Beard Equipment Company | CU937 | Mine contractor | — |
| — | Beard Excavating | CA9640 | Mine contractor | — |
| — | Beard Welding | CN945 | Mine contractor | — |
| — | Beartooth Mining & Tunneling | CA9240 | Mine contractor | — |
| — | BEARTOOTH MINING INC. | CC8270 | Mine contractor | — |
| — | BEAUDRY OIL | CA0290 | Mine contractor | — |
| — | Becdavis Inc Dba Jan-Pro of AR | CC6004 | Mine contractor | — |
| — | Becker Wholesale Mine Supply, LLC | CZ019 | Mine contractor | — |
| — | Beckley Crane & Construction, Inc. | CK232 | Mine contractor | — |
| — | Beckley Drilling & Blasting Sv | C7YE | Mine contractor | — |
| — | Bedrock Holdings Group, LLC | CC9359 | Mine contractor | — |
| — | Bedrock Stone Company | CX214 | Mine contractor | — |
| — | Beesing Welding | CD772 | Mine contractor | — |
| — | Beeson Welding | CB5105 | Mine contractor | — |
| — | Beitzel Corporation | CU02 | Mine contractor | — |
| — | Bejac Corporation | CP836 | Mine contractor | — |
| — | Bell Farms Reclamation Service | CGKI | Mine contractor | — |