| — | Hearn Farms, Inc. | CB8260 | Mine contractor | — |
| — | Hearon Construction and Contracting, Inc. | CK569 | Mine contractor | — |
| — | Heart of Ohio Electrical | CC8552 | Mine contractor | — |
| — | Heartland Aggregate Mining LLC | CA4177 | Mine contractor | — |
| — | Heartland Crane and Rigging | CC3243 | Mine contractor | — |
| — | Heartstone Inc. | CC3735 | Mine contractor | — |
| — | Heaton Design Build LLC | CC8703 | Mine contractor | — |
| — | Heavy Arrow Industry | CC2014 | Mine contractor | — |
| — | HEAVY EQUIPMENT MACHINERY INC | CN397 | Mine contractor | — |
| — | Heavy Equipment Repair | C7FZ | Mine contractor | — |
| — | Heavy Equipment Repair | CB6775 | Mine contractor | — |
| — | Heavy Equipment Repair Service | CZ741 | Mine contractor | — |
| — | Heavy Machines Inc | CCHY | Mine contractor | — |
| — | Heavy Maintenance Supply Inc | CB624 | Mine contractor | — |
| — | Heavy Metal Welding LLC | CC6320 | Mine contractor | — |
| — | HECO Wheeling Service Center, LLC Dba Warwood Arma | CWXQ | Mine contractor | — |
| — | Heeman Drilling, LLC | CC2039 | Mine contractor | — |
| — | Heenan Excavating &Trucking Inc. | CA9841 | Mine contractor | — |
| — | Hegland's Creative Landscape LLC | CB7866 | Mine contractor | — |
| — | Heidelberg Technology Center, Div. Lehigh Cement | CA538 | Mine contractor | — |
| — | Heintz Excavating LLC | CC7073 | Mine contractor | — |
| — | Helix Ironwood LLC | CX560 | Mine contractor | — |
| — | Hellandback Trucking | CA2194 | Mine contractor | — |
| — | Helmer Electric, Inc. | CN571 | Mine contractor | — |
| — | Helmick Environmental Services Inc. | CC3705 | Mine contractor | — |
| — | Helton Electrical Services | C3UF | Mine contractor | — |
| — | Henderson Services, LLC | CJ495 | Mine contractor | — |
| — | Hendrixson Concrete & Construction | CC7462 | Mine contractor | — |
| — | Henry A Petter Supply Co | CDVN | Mine contractor | — |
| — | Henry Fischer & Sons Leasing, Inc. | CZ009 | Mine contractor | — |
| — | Henry Gurtzweiler Inc. | CNLH | Mine contractor | — |
| — | Henry's Dragline Service LLC | CC0798 | Mine contractor | — |
| — | Hepburn Engineering | CB6529 | Mine contractor | — |
| — | Hepta Proyectos S.A.S | CC8433 | Mine contractor | — |
| — | Heritage Cooperative, Inc. | CA8490 | Mine contractor | — |
| — | Heritage Enviromental Services | C1UD | Mine contractor | — |
| — | Heritage Industries | CC7424 | Mine contractor | — |
| — | Heritage Lawn & Tree Care | CQ568 | Mine contractor | — |
| — | Heritage Petroleum L.L.C. | C7KQ | Mine contractor | — |
| — | Heritage Technical Associates, Inc. | CYZF | Mine contractor | — |
| — | Heritage-Crystal Clean, LLC | CQ429 | Mine contractor | — |
| — | Hernandez Industrial Solutions | CB5674 | Mine contractor | — |
| — | Hershey Leaman Co. | CB5587 | Mine contractor | — |
| — | Herson Global LLC | CC8067 | Mine contractor | — |
| — | Hert's Diesel Service | CB8113 | Mine contractor | — |
| — | Herzog Railroad Services, Inc. | CA9624 | Mine contractor | — |
| — | HESS EXCAVATING INC | CF472 | Mine contractor | — |
| — | HeviQuip LLC | CB2010 | Mine contractor | — |
| — | HGI Mine Services Inc. | C3DD | Mine contractor | — |
| — | Hi Banks Rock Products, Inc. dba L&S Rock Products | CW906 | Mine contractor | — |
| — | Hi Test Trucking, LLC | CB5903 | Mine contractor | — |
| — | Hi-Speed Industrial Service | C9FN | Mine contractor | — |
| — | Hi-Tek Biz dba Shallow Creek Electrical Services | CC6310 | Mine contractor | — |
| — | Hibbs ElectroMechanical, INC | CC025 | Mine contractor | — |
| — | Hickey Electric Inc. | CC0016 | Mine contractor | — |
| — | Hickman Electric Corp. | CR755 | Mine contractor | — |
| — | Hierarchy Safety Solutions | CC8304 | Mine contractor | — |
| — | Higgins Electric and Technical Services, Inc. | CE750 | Mine contractor | — |
| — | High Country Excavation & Fencing LLC | CC9428 | Mine contractor | — |
| — | High Country Transportation I | CCWK | Mine contractor | — |
| — | High Density Poly Enterprises, Inc. | CB2930 | Mine contractor | — |
| — | High Desert Mechanical LLC | CB7904 | Mine contractor | — |
| — | High Ground Equipment | CD0079 | Mine contractor | — |
| — | High Mark Const Llc | C9AR | Mine contractor | — |
| — | High Plains Electric | CH164 | Mine contractor | — |
| — | High Plains Transport | CA6845 | Mine contractor | — |
| — | High Valley Trucking, Inc. | CG816 | Mine contractor | — |
| — | High Voltage Solutions LLC | CC6975 | Mine contractor | — |
| — | Highland Blasting & Associates, Inc. | CB8706 | Mine contractor | — |
| — | Highway Equipment & Supply Company | CJWM | Mine contractor | — |
| — | Hile Enterprises, LLC | CC3706 | Mine contractor | — |
| — | Hill Crane Service Inc. | CB7498 | Mine contractor | — |
| — | Hill Wood Products Inc | CVZU | Mine contractor | — |
| — | Hills Machinery Company, LLC | CY381 | Mine contractor | — |
| — | Hilltop Energy Inc | CM0B | Mine contractor | — |
| — | Hilscher-Clarke Electric Co | CFYM | Mine contractor | — |
| — | Himes Drilling Company Inc | CHT0 | Mine contractor | — |
| — | Himmel Trucking Inc | CMXZ | Mine contractor | — |
| — | Hines Flagstone LLC | CC3949 | Mine contractor | — |
| — | HINKLE CONSTRUCTION SERVICES,LLC | CB7291 | Mine contractor | — |
| — | Hinkle Trucking Company | CR0E | Mine contractor | — |
| — | Hinton Mining LLC | CA8566 | Mine contractor | — |
| — | HiPoint Aggregate Equipment LLC | CZ558 | Mine contractor | — |
| — | Hite Trucking LLC | CC1746 | Mine contractor | — |
| — | HJ3 Infrastructure Group, LLC of Arizona | CA8663 | Mine contractor | — |
| — | Hjort Excavating Inc | CC5439 | Mine contractor | — |
| — | HKA Industrial Solutions, LLC | CC4704 | Mine contractor | — |
| — | Hladky Construction | CN0A | Mine contractor | — |
| — | HM SEFA Group LLC | CA8952 | Mine contractor | — |
| — | HMS Grading | CA7260 | Mine contractor | — |
| — | Hobgood Electric Machinery Co | CW6Y | Mine contractor | — |
| — | Hodges, Harbin, Newberry, &Tribble | CB7939 | Mine contractor | — |
| — | Hofer & Hofer & Associates Inc | CH396 | Mine contractor | — |
| — | Hoffman Diesel Repair, LLC | CC6382 | Mine contractor | — |
| — | Hoffman International, Inc | CB8691 | Mine contractor | — |
| — | Hoffmann Inc | CBJS | Mine contractor | — |
| — | Hoffmeyer Company, Inc. | CK746 | Mine contractor | — |
| — | Hofmann Industrial North America | CC5086 | Mine contractor | — |
| — | Hofstetter Electrical Services | CC6906 | Mine contractor | — |
| — | hogwash welding | CC9393 | Mine contractor | — |
| — | Hoist & Crane Service Group | C6KI | Mine contractor | — |
| — | Holbert Explosives Inc | CT786 | Mine contractor | — |
| — | Holgersson Contracting Corporation | CA8758 | Mine contractor | — |
| — | Holland | CB622 | Mine contractor | — |
| — | Holland Triple J Enterprises | CB4414 | Mine contractor | — |
| — | HOLLER BOYZ PRESSURE WASHING | CC9776 | Mine contractor | — |
| — | Holley's Repair Service | CK045 | Mine contractor | — |
| — | Holly Hill Logistics | CC3942 | Mine contractor | — |
| — | Holmes Erection Inc | CS345 | Mine contractor | — |
| — | HOLT CAT | CCX2 | Mine contractor | — |
| — | Holt County Road Department | CF801 | Mine contractor | — |
| — | Holt Of California | CZYR | Mine contractor | — |
| — | Holtmeier Construction Inc. | CA6653 | Mine contractor | — |
| — | Homax Oil Sales | CD888 | Mine contractor | — |
| — | Home Oil & Gas Company, Inc. | CE514 | Mine contractor | — |
| — | Hometown Plumbing & Heating In | C8GH | Mine contractor | — |
| — | honstein const. | CC5524 | Mine contractor | — |
| — | Hooper Demolition Inc | CRK4 | Mine contractor | — |
| — | Hoosier Industrial Electric, Inc. | CT208 | Mine contractor | — |
| — | Hoover Construction Co | CCE8 | Mine contractor | — |
| — | Horizon Equipment Repair | CY391 | Mine contractor | — |
| — | Horizons HRS Manufacturing II LLC | CC6130 | Mine contractor | — |
| — | Horn & Associates Inc | CSAW | Mine contractor | — |
| — | Horner Industrial Group Inc. | CD289 | Mine contractor | — |
| — | Horseshoe A Inc. | CB7425 | Mine contractor | — |
| — | Horvic Refractory Services, LLC | CC6825 | Mine contractor | — |
| — | Hosch Company | CHSZ | Mine contractor | — |
| — | HOTWORK-USA LLC | CD843 | Mine contractor | — |
| — | Housby Heavy Equipment, LLC | CB6206 | Mine contractor | — |
| — | Howard Sheppard Inc | CX33 | Mine contractor | — |
| — | Howell Crane & Rigging, Inc. | CACF | Mine contractor | — |
| — | Howell's Recycling LLC | CC3991 | Mine contractor | — |
| — | HPM, Inc. | CC6741 | Mine contractor | — |
| — | HSE Solutions LLC | CB3406 | Mine contractor | — |
| — | Hub Scrap Metals LLC | CA4811 | Mine contractor | — |
| — | Hubbard Consulting Inc | CB8474 | Mine contractor | — |
| — | Hubbartt Electric Inc. | CA7793 | Mine contractor | — |
| — | Hudspeth & Associates, Inc. | CC1003 | Mine contractor | — |
| — | Huey's Equipment Repair | CC7748 | Mine contractor | — |
| — | Huffman Grading Co., Inc. | CT230 | Mine contractor | — |
| — | Hugg & Hall Equipment | C6UA | Mine contractor | — |
| — | Hughes Custom Performance | CC5722 | Mine contractor | — |
| — | Hughes Oil | CB2079 | Mine contractor | — |
| — | Hukill Exploration LLC | CC9604 | Mine contractor | — |
| — | Humboldt RediMix Inc | CM2L | Mine contractor | — |
| — | Humphrey Electric LLC | CA5319 | Mine contractor | — |
| — | Humphrey's Enterprises Inc | CTP6 | Mine contractor | — |
| — | Hunt and Company DBA ChemStation of NC | CA4120 | Mine contractor | — |
| — | Hunt and Sons Inc. | CB6132 | Mine contractor | — |
| — | Hunt Electric Corporation | CNUL | Mine contractor | — |
| — | Hunt Electric, Inc. | CB0933 | Mine contractor | — |
| — | HUNTER EXCAVATION | CD336 | Mine contractor | — |
| — | Hunter Industries | CM935 | Mine contractor | — |
| — | Huron Engineering and Surveying, Inc. | CA7270 | Mine contractor | — |
| — | Hutchinson Transportation | CC4951 | Mine contractor | — |
| — | Hy-Rock Excavation, LLC | CV619 | Mine contractor | — |
| — | Hy-Tech Drilling USA Inc. | CC6191 | Mine contractor | — |
| — | Hydraulic Supply & Service Co. | CT399 | Mine contractor | — |
| — | HYDRO-LOGIC ASSOCIATES, INC. | CB5845 | Mine contractor | — |
| — | Hydro-Spray Wash Systems | CA8266 | Mine contractor | — |
| — | I & E Electric | CNFG | Mine contractor | — |
| — | I & E Solutions, LLC | CA1200 | Mine contractor | — |
| — | I B Abel Inc | CN4H | Mine contractor | — |
| — | I S M Contracting Services Inc | CEWC | Mine contractor | — |
| — | I T R | CA741 | Mine contractor | — |
| — | I&S Group Inc | CA2062 | Mine contractor | — |
| — | I-5 Rentals | CA5248 | Mine contractor | — |
| — | I.B. Dickinson & Sons Inc. | CZ057 | Mine contractor | — |
| — | IA Construction Corporation | CA6243 | Mine contractor | — |
| — | IA Mechanical Inc. | CB9329 | Mine contractor | — |
| — | IBT, Inc. (Industrial Bearing & Transmission) | CG176 | Mine contractor | — |
| — | ICC Commonwealth Corporation | CCBS | Mine contractor | — |
| — | ICF | CB7224 | Mine contractor | — |
| — | ICM Solutions | CC1649 | Mine contractor | — |
| — | ICON Integrated Mechanical Solutions | CC2414 | Mine contractor | — |
| — | ICON Technologies LLC | CB0051 | Mine contractor | — |
| — | Iconic Crane and Rigging | CC2887 | Mine contractor | — |
| — | ICR Staffing | CP194 | Mine contractor | — |
| — | IDA Power and Controls, Inc. | CC9600 | Mine contractor | — |
| — | Idaho Construction and Excavation | CC9442 | Mine contractor | — |
| — | Idaho Mine Technicians | CC1699 | Mine contractor | — |
| — | Ideal Industrial Solutions | CC5603 | Mine contractor | — |
| — | Ideon Technologies Inc | CC6789 | Mine contractor | — |
| — | IKN USA Inc | CB2533 | Mine contractor | — |
| — | Illini State Trucking Co | CHYH | Mine contractor | — |
| — | Illinois Land Resources, Inc. Mid West Vulcanizing | CB4028 | Mine contractor | — |
| — | Imac | C4DZ | Mine contractor | — |
| — | IMDEX USA INC | CA5919 | Mine contractor | — |
| — | IMEG Corp | CB7203 | Mine contractor | — |
| — | imi Construction Crew | CC8806 | Mine contractor | — |
| — | imi Dirt Crew | CC8810 | Mine contractor | — |
| — | Immedia, LLC | CC9206 | Mine contractor | — |
| — | Impact Contractors Inc. | CA2247 | Mine contractor | — |
| — | Imperatore Steel Erectors, Inc. | CW734 | Mine contractor | — |
| — | In-Place Machining Company, Inc. | CSIM | Mine contractor | — |
| — | In-Plant Services, Inc. | CA7393 | Mine contractor | — |
| — | Independent Enterprise Company LLC | CC8993 | Mine contractor | — |
| — | Independent Mine Maintenance LLC | CA5679 | Mine contractor | — |
| — | Independent Two | CB5976 | Mine contractor | — |
| — | Indust Machine & Welding | C7UY | Mine contractor | — |
| — | Industrial & Fire Safety Services | CB3015 | Mine contractor | — |
| — | Industrial Access, Inc. | CA6269 | Mine contractor | — |
| — | Industrial Air of South TX | CB3694 | Mine contractor | — |
| — | INDUSTRIAL BELT MAINTENANCE LLC | CC3037 | Mine contractor | — |
| — | Industrial Cleaning & Degrease | C9PG | Mine contractor | — |
| — | Industrial Cleaning Environmental, Inc. | CP082 | Mine contractor | — |
| — | Industrial Construction & Contracting, LLC | CC4206 | Mine contractor | — |
| — | Industrial Construction Services | CD142 | Mine contractor | — |
| — | Industrial Construction Specialists | CA4641 | Mine contractor | — |
| — | Industrial Constructors/Manag | CAPA | Mine contractor | — |
| — | Industrial Conveyor Belt Systems | CB5729 | Mine contractor | — |
| — | Industrial Downtime Solutions Inc. | CQ495 | Mine contractor | — |
| — | Industrial Electric Service | CLUK | Mine contractor | — |
| — | Industrial Elevator Maintenance Co. Inc. | CR61 | Mine contractor | — |
| — | Industrial Furnance Co. | CP865 | Mine contractor | — |
| — | Industrial Instrumentation Solutions LLC | CA7990 | Mine contractor | — |
| — | Industrial Kiln & Dryer Group | CR144 | Mine contractor | — |
| — | Industrial Lubricant Co | CDP1 | Mine contractor | — |
| — | Industrial Maintenance & Automation, LLC | CZ484 | Mine contractor | — |
| — | Industrial maintenance contracting | CC3418 | Mine contractor | — |
| — | Industrial Maintenance Inc | CZ6I | Mine contractor | — |
| — | Industrial Management Service inc | CB4131 | Mine contractor | — |
| — | Industrial Mechanical, Inc. | CK010 | Mine contractor | — |
| — | Industrial Oils Unlimited | CA2658 | Mine contractor | — |
| — | Industrial Piping & Mechanical | CA4168 | Mine contractor | — |
| — | Industrial Power Inc. | CZ310 | Mine contractor | — |
| — | Industrial Power Systems Inc | C7KF | Mine contractor | — |
| — | Industrial Project and Field Services LLC | CB8614 | Mine contractor | — |
| — | Industrial Railways Co. | CQ722 | Mine contractor | — |
| — | Industrial Rubber Applicators | CQ3W | Mine contractor | — |
| — | Industrial Rubber Specialties, Inc. | CA7397 | Mine contractor | — |
| — | Industrial Safety and Health LLC | CB1598 | Mine contractor | — |
| — | Industrial Service Solutions, LLC | CC2477 | Mine contractor | — |
| — | Industrial Services and Solutions, Inc | CA7937 | Mine contractor | — |
| — | Industrial South, Inc. | CB1890 | Mine contractor | — |
| — | Industrial Support Service, LL | CA7436 | Mine contractor | — |
| — | Industrial Systems Consulting | CC5348 | Mine contractor | — |
| — | Industrial Tool & Supply Company | CJGB | Mine contractor | — |
| — | Industrial Vac Services, LLC | CC2442 | Mine contractor | — |
| — | Industrial Ventilation, Inc. | CP304 | Mine contractor | — |
| — | Industrial Vibrations Consultants, Inc. | CM759 | Mine contractor | — |
| — | Industry Services Co Inc | CVAN | Mine contractor | — |
| — | Industry Specialist Inc. | CH982 | Mine contractor | — |
| — | Industsysof Cape Girardeau | CHZV | Mine contractor | — |
| — | Inertia Machine Corporation | CW936 | Mine contractor | — |
| — | Infinity Fence LLC | CC4908 | Mine contractor | — |
| — | IngenAE, LLC | CNAW | Mine contractor | — |
| — | Ingersoll Rand | CS196 | Mine contractor | — |
| — | Inland Big 4 Tire Service | CA2336 | Mine contractor | — |
| — | Inland Crane Inc | CE335 | Mine contractor | — |
| — | Innomotics LLC | CC5634 | Mine contractor | — |
| — | Innovative Maintenance Services, LLC | CB8989 | Mine contractor | — |
| — | Innovative Mining Consulting | CC9147 | Mine contractor | — |
| — | Innovative Scale LLC | CA3787 | Mine contractor | — |
| — | Insight Environmental, Inc. | CC6029 | Mine contractor | — |
| — | Instrumentation & Control Systems Engineering, Inc | CB0437 | Mine contractor | — |
| — | Insulation, Inc. | CND2 | Mine contractor | — |
| — | Intak Rentals and Supply LLC | CC0789 | Mine contractor | — |
| — | Integrate Electrical Group | CC7803 | Mine contractor | — |
| — | Integrated Power Services (IPS) | CB3670 | Mine contractor | — |
| — | Integrated Scaffolding & Services LLC | CC3155 | Mine contractor | — |
| — | Integrity Grading and Excavating, Inc. | CA9014 | Mine contractor | — |
| — | Integrity Heavy Equipment Repair,LLC | CC3709 | Mine contractor | — |
| — | Integrity Services Group, Inc. | CB4427 | Mine contractor | — |
| — | Integrity Welding, LLC | CC5641 | Mine contractor | — |
| — | Inter Core Construction Corp. | CC2215 | Mine contractor | — |
| — | INTERA Inc | CB7034 | Mine contractor | — |
| — | Intermountain Battery | CB9652 | Mine contractor | — |
| — | Intermountain Construction Services, LLC | CZ576 | Mine contractor | — |
| — | Intermountain Electric | C1MC | Mine contractor | — |
| — | Intermountain Mining Technology | CC7426 | Mine contractor | — |
| — | Intermountain OM Holdings DBA IRH | CC5843 | Mine contractor | — |
| — | International Belt & Rubber | C1ZD | Mine contractor | — |
| — | International Conveyor & Rubber, LLC | CB3450 | Mine contractor | — |
| — | International Cover Systems, Inc. | CC5875 | Mine contractor | — |
| — | International Diggers LLC | CB8843 | Mine contractor | — |
| — | International Lining Technology | CH902 | Mine contractor | — |
| — | Interstate Earthworks LLC | CC4486 | Mine contractor | — |
| — | Interstate Electrical Services | CK6H | Mine contractor | — |
| — | Interstate Power Systems, Inc. | CT02 | Mine contractor | — |
| — | Interstates | CL252 | Mine contractor | — |
| — | Interwest Supply Co | CB013 | Mine contractor | — |
| — | Intex Inc | C9ED | Mine contractor | — |
| — | Intragin, Inc. | CC6302 | Mine contractor | — |
| — | Intramotev | CC7444 | Mine contractor | — |
| — | IOI LLC. | CC8471 | Mine contractor | — |
| — | IPE Aggregate, LLC | CB5787 | Mine contractor | — |
| — | IPEC, Inc | CE938 | Mine contractor | — |
| — | Iron Base llc | CD0349 | Mine contractor | — |
| — | Iron Creek Services, LLC | CC0680 | Mine contractor | — |
| — | Iron Dynamics Inc | CX944 | Mine contractor | — |
| — | Iron Horse Trucking | CC4810 | Mine contractor | — |
| — | Iron Oak Dover LLC | CC4841 | Mine contractor | — |
| — | Iron Range Plumbing and Heating Inc. | CC6539 | Mine contractor | — |
| — | Iron Solutions LLC | CC6802 | Mine contractor | — |
| — | Ironclad Custom Buildings & Fabrication LLC | CC9852 | Mine contractor | — |
| — | Irondale Industrial Contractors, Inc | C7NM | Mine contractor | — |
| — | Ironhorse Inc | CJLA | Mine contractor | — |
| — | Ironhorse Maintenance LLC | CC2797 | Mine contractor | — |
| — | Irtec | CZ142 | Mine contractor | — |