| — | Compression Leasing Services, Inc. | CR593 | Mine contractor | — |
| — | Compressor services and Parts LLC | CS815 | Mine contractor | — |
| — | Comstock Trucking | CV687 | Mine contractor | — |
| — | Con-Wear Products Inc | CF253 | Mine contractor | — |
| — | ConAg Industrial Repair | CM011 | Mine contractor | — |
| — | Conam Construction Co | CYQE | Mine contractor | — |
| — | Concept Excavating Inc | CC7865 | Mine contractor | — |
| — | Concrete Coring Co | CA827 | Mine contractor | — |
| — | Concrete House LLC. | CC7859 | Mine contractor | — |
| — | Concrete Onsite Express DBA Kings Peak Ready Mix | CC8422 | Mine contractor | — |
| — | CONCRETE SYSTEMS COMPANY LLC | CA6226 | Mine contractor | — |
| — | Condict Equipment Co., Inc. | CB2876 | Mine contractor | — |
| — | Condustrial Inc. | CA1274 | Mine contractor | — |
| — | Conetec, Inc. | CJ356 | Mine contractor | — |
| — | Confluence Environmental, Inc. | CC8477 | Mine contractor | — |
| — | Conley Construction Company | CH5K | Mine contractor | — |
| — | Conmat Inc | CB4316 | Mine contractor | — |
| — | Conn Equipment | CQLV | Mine contractor | — |
| — | Conn-Weld Industries, LLC | CC1560 | Mine contractor | — |
| — | Connecticut Explosives Co Inc | CQWB | Mine contractor | — |
| — | Connell Resources, Inc. | CK354 | Mine contractor | — |
| — | Connell Trucking LLC | CC2037 | Mine contractor | — |
| — | Conner Welding & Heavy Equipment Repair | CA3663 | Mine contractor | — |
| — | Consolidated Acoustics Inc | CPV3 | Mine contractor | — |
| — | Construction Division | C7QC | Mine contractor | — |
| — | Construction Drilling Service Corporation | CY488 | Mine contractor | — |
| — | Construction Equipment Service | CZ964 | Mine contractor | — |
| — | Construction Mach Ind LLC | CE376 | Mine contractor | — |
| — | Construction Machinery Co, LLC | CJ186 | Mine contractor | — |
| — | Construction on all Levels, LLC | CB8234 | Mine contractor | — |
| — | Constructors, Inc. | CZJ1 | Mine contractor | — |
| — | Container Maintenance Corp. | CB0396 | Mine contractor | — |
| — | Continental | CU688 | Mine contractor | — |
| — | Continental Coal, Inc. | CC4848 | Mine contractor | — |
| — | Continental Construction Co | CJH3 | Mine contractor | — |
| — | Continental Equipment Company LLC | CR508 | Mine contractor | — |
| — | Continental Placer Inc | CYUI | Mine contractor | — |
| — | Contour Mining and Construction, LLC. | CA5012 | Mine contractor | — |
| — | Contra Cost Electric Inc | CEHS | Mine contractor | — |
| — | CONTRACTORS POWER & LIGHT COMPANY | CB0494 | Mine contractor | — |
| — | Contractors Sales Co Inc | C8KT | Mine contractor | — |
| — | Controlled Blasting Services | CX262 | Mine contractor | — |
| — | Convergent Mining, LLC | CC5725 | Mine contractor | — |
| — | Conveyance Acquisition LLC | CB8297 | Mine contractor | — |
| — | Conveying Solutions, LLC | CX843 | Mine contractor | — |
| — | Conveyor Belt Service Inc | CG10 | Mine contractor | — |
| — | Conveyor Consulting and Rubber Corporation | CB3790 | Mine contractor | — |
| — | Conveyor Specialties Inc | C9PM | Mine contractor | — |
| — | Conveyor Works LLC | CC6711 | Mine contractor | — |
| — | Conveyors & Equipment | CJF3 | Mine contractor | — |
| — | Conway Welding, LLC | CB3066 | Mine contractor | — |
| — | Cook S Manufacturing Co | CY0W | Mine contractor | — |
| — | Cooks Excavating | CT5U | Mine contractor | — |
| — | COOPER FABRICATION INC | CC9952 | Mine contractor | — |
| — | Cooper Rail Service Inc | C1ST | Mine contractor | — |
| — | Coos Bay Timber Operators | CA1585 | Mine contractor | — |
| — | Copper Canyon Safety | CC9626 | Mine contractor | — |
| — | Copper State Bolt & Nut Co. | CH693 | Mine contractor | — |
| — | Copper State Engineering, Inc. | CZ660 | Mine contractor | — |
| — | Copper State Industrial Installation Inc. | CC7331 | Mine contractor | — |
| — | Copper State Sanitation, Inc | CC9086 | Mine contractor | — |
| — | Copperhead LLC | CA2058 | Mine contractor | — |
| — | Copperstone Technologies Ltd | CC1913 | Mine contractor | — |
| — | Corbitt Construction | CA7164 | Mine contractor | — |
| — | Core & Main LP | C2NL | Mine contractor | — |
| — | Core Industrial Group | CB3738 | Mine contractor | — |
| — | CORE Machinery LLC | CU40 | Mine contractor | — |
| — | CoreTer, LLC | CC9155 | Mine contractor | — |
| — | Corky Wells Electric, Inc. dba CW Services | CKFW | Mine contractor | — |
| — | Corley Trucking, LLC | CS209 | Mine contractor | — |
| — | Cornell Enterprises LLC | CB7606 | Mine contractor | — |
| — | Cornerstone Crushing, LLC. | CC8837 | Mine contractor | — |
| — | Cornerstone Design & Fabrication LLC. | CA4853 | Mine contractor | — |
| — | CORNERSTONE ELECTRICAL INC. | CA6767 | Mine contractor | — |
| — | Cornerstone Environmental Group, LLC | CZ686 | Mine contractor | — |
| — | Cornerstone Industries Inc. | CC7105 | Mine contractor | — |
| — | Cornerstone labor services llc | CC7785 | Mine contractor | — |
| — | Cornerstone Labor Services, Inc. | CB4839 | Mine contractor | — |
| — | Cornerstone Mechanical Services, LLC | CA4512 | Mine contractor | — |
| — | Cornerview welding | CC6881 | Mine contractor | — |
| — | Corrigan Oil Co | CA9908 | Mine contractor | — |
| — | Corrosion Control | CM307 | Mine contractor | — |
| — | Corrosion Monitoring Services, Inc. | CA2503 | Mine contractor | — |
| — | Cortes Brothers Industrial, LLC | CC3574 | Mine contractor | — |
| — | Corval Group | CC5553 | Mine contractor | — |
| — | Costabile Construction, Inc. | CA4875 | Mine contractor | — |
| — | Cotton Pickin Clean LLC | CC8978 | Mine contractor | — |
| — | Country Boy Seed, Inc. | CA7247 | Mine contractor | — |
| — | Coverstone Company LLC | CC4858 | Mine contractor | — |
| — | Cowboy Cooling & Heating, LLC | CC8232 | Mine contractor | — |
| — | Cowden Dirt Works LLC | CC9082 | Mine contractor | — |
| — | Cowin & Company, Inc. | CB84 | Mine contractor | — |
| — | Cowin Equipment Company Inc | CVMD | Mine contractor | — |
| — | COX PAVING LLC | CB2087 | Mine contractor | — |
| — | Coy Landscaping and Maintenance, Inc. | CV636 | Mine contractor | — |
| — | CP Excavating and Mining | CC0418 | Mine contractor | — |
| — | CPC TRANSPORT | CC9839 | Mine contractor | — |
| — | CR Mining Equipment (CR Digital) | CC634 | Mine contractor | — |
| — | CR Services, LLC | CB4335 | Mine contractor | — |
| — | Crabtree Stone, Inc. | CJ313 | Mine contractor | — |
| — | Cramer Security & Investigations, Inc. | CJ533 | Mine contractor | — |
| — | Crandell Stone | CA2662 | Mine contractor | — |
| — | Crane & Rigging Corporation | CA4953 | Mine contractor | — |
| — | Crane Man Inc. | CA0017 | Mine contractor | — |
| — | Crane Rental Service Inc | CPHK | Mine contractor | — |
| — | Crane Services inc. | CL723 | Mine contractor | — |
| — | Crane Services, Inc. | CA4989 | Mine contractor | — |
| — | Crane Specialists Inc. | CA2977 | Mine contractor | — |
| — | Crane Works | CJ351 | Mine contractor | — |
| — | Crane Works Rentals | CB1233 | Mine contractor | — |
| — | Cranemasters, Inc. | CS405 | Mine contractor | — |
| — | Cranes & Material Handling, Inc . | CR432 | Mine contractor | — |
| — | Cranetech Inc. | CB4096 | Mine contractor | — |
| — | Craven Ag Services Inc | CA8940 | Mine contractor | — |
| — | Craven Industrial contruction company | CB8816 | Mine contractor | — |
| — | Crawford and Son | CL236 | Mine contractor | — |
| — | Cream City Scale L.L.C. | CS397 | Mine contractor | — |
| — | Creation Welding | CA4941 | Mine contractor | — |
| — | Creel Bros Inc | CSGD | Mine contractor | — |
| — | Cripple Creek Consulting & Environmental | CC9541 | Mine contractor | — |
| — | Crisp Industries, LLC | CZ3F | Mine contractor | — |
| — | Criss Industrial Maintenance LLC. | CB1212 | Mine contractor | — |
| — | Criste Engineering Services | CYBD | Mine contractor | — |
| — | Crocker Crane, L.P. | CE530 | Mine contractor | — |
| — | Crocker Welding | CC2363 | Mine contractor | — |
| — | Cromer Contracting Co | CN65 | Mine contractor | — |
| — | Cross Ironworks L.L.C. | CB6524 | Mine contractor | — |
| — | Crosscut Concrete Cutting, Inc. | CC0594 | Mine contractor | — |
| — | Crossroads Construction Co | CAS9 | Mine contractor | — |
| — | Crowe Electric | CB7271 | Mine contractor | — |
| — | Crowley Fuels LLC | CA9327 | Mine contractor | — |
| — | Crowley'S Ridge Sand & Gravel | C5FL | Mine contractor | — |
| — | Crown Battery Mfg. | CS431 | Mine contractor | — |
| — | Crown Lift Trucks | CA9066 | Mine contractor | — |
| — | CRS, LLC | CB8681 | Mine contractor | — |
| — | CRST | CC1289 | Mine contractor | — |
| — | CRUSH Welding LLC | CA7472 | Mine contractor | — |
| — | Crusher Rental and Sales | CV309 | Mine contractor | — |
| — | CRUSHING EQUIPMENT SOLUTIONS | CC5441 | Mine contractor | — |
| — | Cruz stone work | CC4307 | Mine contractor | — |
| — | CSA fabrication and field services inc. | CC9551 | Mine contractor | — |
| — | CSM Consulting and Technical Support LLC | CC8961 | Mine contractor | — |
| — | CST Storage | CA6164 | Mine contractor | — |
| — | CTS Services, Inc. | CA7095 | Mine contractor | — |
| — | Cullum and Brown | CX566 | Mine contractor | — |
| — | Culver Heating & Air Conditioning | CB2766 | Mine contractor | — |
| — | Cumberland Gravel & Sand | CV3T | Mine contractor | — |
| — | Cumberland Mine Service | CBGW | Mine contractor | — |
| — | Cumberland Valley Tree Service | CW769 | Mine contractor | — |
| — | Cummins Central Power, LLC | CB052 | Mine contractor | — |
| — | Cummins First Mode | CC8612 | Mine contractor | — |
| — | Cummins Gateway Inc | CDUD | Mine contractor | — |
| — | Cummins NPower LLC | CJR5 | Mine contractor | — |
| — | Cummins Pacific, LLC | CA9694 | Mine contractor | — |
| — | Cummins Rocky Mountain LLC | CIN2 | Mine contractor | — |
| — | Cummins Sales & Service North America Southern US | CB919 | Mine contractor | — |
| — | CURBSIDE LAWN CARE & IRRIGATION | CE559 | Mine contractor | — |
| — | Curran Contracting Company | CD591 | Mine contractor | — |
| — | Custer Telephone Cooperative Inc. | CA6116 | Mine contractor | — |
| — | Custom Controls & Automation, Inc. | CB6094 | Mine contractor | — |
| — | Custom Drilling Services, Inc. | CJ489 | Mine contractor | — |
| — | Custom Quality Scaffolding, Inc. | CB5727 | Mine contractor | — |
| — | Cut 2 Fit Welding | CX281 | Mine contractor | — |
| — | cut ups lawncare | CC9043 | Mine contractor | — |
| — | Cutting Edge Trucking, Inc. | CK371 | Mine contractor | — |
| — | CW Industries | CC2370 | Mine contractor | — |
| — | CYCLONE TRANSPORT LLC | CA8020 | Mine contractor | — |
| — | Cytec Industries | CHFY | Mine contractor | — |
| — | D & G Machine Co Inc | CLNY | Mine contractor | — |
| — | D & GM Consttruction LLC | CC7758 | Mine contractor | — |
| — | D & L Electric Co., Ltd. | CA1164 | Mine contractor | — |
| — | D & M Construction | CGBH | Mine contractor | — |
| — | D & O Crane | CU455 | Mine contractor | — |
| — | D & R Trucking, LLC | CA0131 | Mine contractor | — |
| — | D & T Landscaping Inc | CEXG | Mine contractor | — |
| — | D & W Crane & Rigging, Inc. | CB1486 | Mine contractor | — |
| — | D A Smith Drilling | C6MX | Mine contractor | — |
| — | D Fenn Enterprises | CF266 | Mine contractor | — |
| — | D J B Welding Corp | CDDH | Mine contractor | — |
| — | D J Minerals Inc | CMVY | Mine contractor | — |
| — | D J Scale Service | CB8163 | Mine contractor | — |
| — | D K Stephens Enterprises | CB4485 | Mine contractor | — |
| — | D L George & Sons | CZXV | Mine contractor | — |
| — | D L Peters Electrical Contract | CTPG | Mine contractor | — |
| — | D M W Trucking | CDUB | Mine contractor | — |
| — | D&E Developments | CC3997 | Mine contractor | — |
| — | D&E Services, LLC | CC2627 | Mine contractor | — |
| — | D&H Industrial llC | CB9404 | Mine contractor | — |
| — | D&L Heavy Equipment | CC6761 | Mine contractor | — |
| — | D&S Construction | CC3825 | Mine contractor | — |
| — | D&S Dirtworks LLP | CC0120 | Mine contractor | — |
| — | D&W Contractors LLC | CA9574 | Mine contractor | — |
| — | D. M. Electric & Service | CL757 | Mine contractor | — |
| — | D. R. Reynolds Company, Inc. | CL080 | Mine contractor | — |
| — | D.B. Wardwell EXC. LLC | CC8149 | Mine contractor | — |
| — | D.E. Bell Trucking LLC | CB5570 | Mine contractor | — |
| — | D.F. Miller Enterprises Inc | CC3724 | Mine contractor | — |
| — | D.H. Griffin Wrecking Co., Inc. | CP863 | Mine contractor | — |
| — | D.L. Steiner, Inc. | CC8092 | Mine contractor | — |
| — | D4 Drill and Blast, LLC | CC7887 | Mine contractor | — |
| — | DAG Industries LLC | CB8066 | Mine contractor | — |
| — | Daggett Sand & Gravel | CB7975 | Mine contractor | — |
| — | Dailey and Davis | CC7997 | Mine contractor | — |
| — | Dailey Welding Co. | CC8634 | Mine contractor | — |
| — | Daily Ag Products, Inc | CQ410 | Mine contractor | — |
| — | Dak Demolition LLC | CC2970 | Mine contractor | — |
| — | Dakota Equipment Manufacturing Inc | CB1748 | Mine contractor | — |
| — | Dakota Fluid Power | CC0396 | Mine contractor | — |
| — | Dale Oxygen & Acetylene Serv | CCP4 | Mine contractor | — |
| — | Dale's 81 Electric | CC1196 | Mine contractor | — |
| — | Dalmolin Excavating | CUJX | Mine contractor | — |
| — | Dalrymple Gravel & Contracting Co., Inc. | CC0568 | Mine contractor | — |
| — | Dalton Supply & Service, Inc | CV983 | Mine contractor | — |
| — | Dan Cristiani Excavating Co | CPGE | Mine contractor | — |
| — | Dan Lafferty Construction, Inc | CS535 | Mine contractor | — |
| — | Dan's Excavating, Inc. | CN822 | Mine contractor | — |
| — | Dan's Welding Inc. | CV831 | Mine contractor | — |
| — | Dan's Welding Service | CH277 | Mine contractor | — |
| — | Daniel Industrial Contractors LLC | CC9008 | Mine contractor | — |
| — | Danny Moores Welding | C7LL | Mine contractor | — |
| — | Darr Electrical Services Inc. | CC7021 | Mine contractor | — |
| — | Darr's Cleaning Inc | CC6848 | Mine contractor | — |
| — | Darrell's Glass Service | CA5997 | Mine contractor | — |
| — | Darwin Maricio Vasquez Ordonez | CC4911 | Mine contractor | — |
| — | Dashiell Corp | CC9182 | Mine contractor | — |
| — | DAT Fire Extinguisher Service LLC | CC3918 | Mine contractor | — |
| — | Daugherty Services, Inc. | CK339 | Mine contractor | — |
| — | Dave Evans Transport | CQ778 | Mine contractor | — |
| — | DAVE ROCK COMPANY LLC | CC8670 | Mine contractor | — |
| — | Dave's Diesel Repair, L.L.C. | CB9639 | Mine contractor | — |
| — | Davey Bickford USA Inc. | CJ601 | Mine contractor | — |
| — | David Crye General Engineering Contractor, Inc. | CC8760 | Mine contractor | — |
| — | David L Snow | C2YQ | Mine contractor | — |
| — | David Prozeller General Contractor | CC1687 | Mine contractor | — |
| — | David Rumage | CC5331 | Mine contractor | — |
| — | David W Fannick Elect Contr | CNZQ | Mine contractor | — |
| — | Davids Diamond Drilling, LLC | CB8390 | Mine contractor | — |
| — | Davidson Sales & Engineering, Inc. | CB9638 | Mine contractor | — |
| — | Davis Equipment Solutions | CC7743 | Mine contractor | — |
| — | Davis H. Elliot Co., Inc | CM23 | Mine contractor | — |
| — | Davis Mining, LLC | CC9831 | Mine contractor | — |
| — | Dawn Rock Drilling and Blasting LLC | CC3002 | Mine contractor | — |
| — | Dawson Construction LLC | CASW | Mine contractor | — |
| — | Dawson Roofing | CR964 | Mine contractor | — |
| — | Dayboys Company | CL943 | Mine contractor | — |
| — | DBA Smiley Trucking | CB6653 | Mine contractor | — |
| — | DC Heavy Repair and Welding | CC4054 | Mine contractor | — |
| — | DC Pumps, LLC | CB4906 | Mine contractor | — |
| — | DC Water Trucking | CC4053 | Mine contractor | — |
| — | DCL Inc | CB4661 | Mine contractor | — |
| — | DCR Safety & Training | CB7917 | Mine contractor | — |
| — | DCSWare, Inc. | CA9886 | Mine contractor | — |
| — | De John Equipment Company | CC5432 | Mine contractor | — |
| — | Dean Baughman Industrial Services | CB8001 | Mine contractor | — |
| — | Dean Equipment | CC7469 | Mine contractor | — |
| — | Dean Steel | CR629 | Mine contractor | — |
| — | DeBra-Kuempel | CT442 | Mine contractor | — |
| — | Debrich LLC | CA0790 | Mine contractor | — |
| — | Deciero Welding | CC0404 | Mine contractor | — |
| — | Decota Consulting Company | CA620 | Mine contractor | — |
| — | Dedicated Line Service, Inc | CB5799 | Mine contractor | — |
| — | DEECO, Inc. | CF632 | Mine contractor | — |
| — | Deep South Industrial | CT720 | Mine contractor | — |
| — | Deer Creek General Contractors | CC6857 | Mine contractor | — |
| — | Deere Creek Excavation LLC | CC6284 | Mine contractor | — |
| — | DEFCO INC | CC4806 | Mine contractor | — |
| — | Deinon Solutions Inc. | CB1266 | Mine contractor | — |
| — | DEISTER MACHINE COMPANY INC. | CE084 | Mine contractor | — |
| — | DeLong Mountain Logistics LLC | C3LV | Mine contractor | — |
| — | Delray Mechanical Corporation | CN856 | Mine contractor | — |
| — | Delrick Corp | CK8A | Mine contractor | — |
| — | Delta Bulk Transport Inc | C1RJ | Mine contractor | — |
| — | Delta Peak Integrated LLC | CC9266 | Mine contractor | — |
| — | Deming Coca Cola Bottling Co. | CV145 | Mine contractor | — |
| — | Denham Welding & Steel Sales | CN554 | Mine contractor | — |
| — | Denney Excavating, Inc. | CC4979 | Mine contractor | — |
| — | Dennis Trucking & Excavating Company, Inc | CC5785 | Mine contractor | — |
| — | Denny Nolen Corp | CA5853 | Mine contractor | — |
| — | Denny Rahn Excavating, Inc | CB3288 | Mine contractor | — |
| — | Dependable Drilling Services, LLC | CL416 | Mine contractor | — |
| — | Derby Fire & Safety LLC | CS524 | Mine contractor | — |
| — | Derrick Mechanical, LLC | CC1685 | Mine contractor | — |
| — | DES ELECTRICAL INC | CC5699 | Mine contractor | — |
| — | Desert Green Disposal and Industrial LLC | CC6720 | Mine contractor | — |
| — | Desert Mountain Corporation | CX043 | Mine contractor | — |
| — | Desert Mountain Security, LLC | CC1467 | Mine contractor | — |
| — | Desert Rock Products | CC7325 | Mine contractor | — |
| — | Desert Scale Company | CA2963 | Mine contractor | — |
| — | Deshazo Service Company | CH588 | Mine contractor | — |
| — | Design Nine Inc | CCNN | Mine contractor | — |
| — | DeSoto Hauling, LLC. | CA2553 | Mine contractor | — |
| — | Dettinburn Transport Inc. | CB7403 | Mine contractor | — |
| — | Devere Industrial, LLC | CB1948 | Mine contractor | — |
| — | Dewar Inc | CIXE | Mine contractor | — |
| — | Dexter Fortson Associates Inc | CGZS | Mine contractor | — |
| — | DG&S Company | CX624 | Mine contractor | — |
| — | DHM Equipment Repair | CC8353 | Mine contractor | — |
| — | Diamond Electric | CA2283 | Mine contractor | — |
| — | Diamond Materials, LLC | CY960 | Mine contractor | — |
| — | Diamond X Mine Services LLC. | CC1236 | Mine contractor | — |