| — | O B Welding LLC | CC1550 | Mine contractor | — |
| — | O'Briens Rental & Sales Inc | CXPI | Mine contractor | — |
| — | O'Cain Inc | CJFT | Mine contractor | — |
| — | O'Connor Corporation | CB8721 | Mine contractor | — |
| — | O'Connor Kiln & Dryer Inc | CG393 | Mine contractor | — |
| — | O'Dell Service and Repair | CC3646 | Mine contractor | — |
| — | O'Keefe Drilling Co Inc | CIR4 | Mine contractor | — |
| — | O'NEAILS SEPTIC SERVICE AND PORTABLE TOILETS LLC | CB7290 | Mine contractor | — |
| — | O'NEIL TRANSPORTATION SERVICES INC | CB0561 | Mine contractor | — |
| — | Oak Hill Contractors | CA2710 | Mine contractor | — |
| — | Oak Mountain Const Co Inc | C8YA | Mine contractor | — |
| — | Oak Ridge Industries | CC8733 | Mine contractor | — |
| — | OC Ranch Management & Reclamation, LLC | CA9265 | Mine contractor | — |
| — | OCC Civil & Mechanical | CB2509 | Mine contractor | — |
| — | Octavio Mateos LLC | CB5595 | Mine contractor | — |
| — | Oddonetto Construction Inc | CL921 | Mine contractor | — |
| — | Odell's Trucking | CRSV | Mine contractor | — |
| — | Odin Environmental Solutions | CC0842 | Mine contractor | — |
| — | Odyssey Drilling Services | CC4753 | Mine contractor | — |
| — | Odyssey USA LLC | CC7584 | Mine contractor | — |
| — | Oertel Sheet Metal | CP802 | Mine contractor | — |
| — | Office Products Inc. | CA7013 | Mine contractor | — |
| — | Ohio Machinery Co | CHX9 | Mine contractor | — |
| — | Oil Burner Diesel | CC7024 | Mine contractor | — |
| — | Okanogan County Department of Public Works | CA0691 | Mine contractor | — |
| — | okemo valley property managemnt | CC9045 | Mine contractor | — |
| — | Okie Drilling, Inc. | CF574 | Mine contractor | — |
| — | Old Savannah Contracting, LLC | CC8623 | Mine contractor | — |
| — | Old Skool Construction | CC8507 | Mine contractor | — |
| — | Olive Hill Welding & Fabrication,Inc | CJ936 | Mine contractor | — |
| — | Olson Electric | CC4066 | Mine contractor | — |
| — | Olson Explosives Inc | CX74 | Mine contractor | — |
| — | Omega Cementing | CLPC | Mine contractor | — |
| — | Omic Electric , LLC | CC8396 | Mine contractor | — |
| — | OmniTRAX WES Switching LLC | CC8759 | Mine contractor | — |
| — | Omya Inc. | CA7605 | Mine contractor | — |
| — | On Site Gas Systems, Inc | CS530 | Mine contractor | — |
| — | On Site Repair Services Inc | CARW | Mine contractor | — |
| — | On-Site Hose Inc | CB3086 | Mine contractor | — |
| — | On-Track Field Service LLC | CC3483 | Mine contractor | — |
| — | Onpoint Industrial Services | CC3325 | Mine contractor | — |
| — | OnSite Owners llc | CY743 | Mine contractor | — |
| — | Onsite Services llc | CC7580 | Mine contractor | — |
| — | Ontario Stone Corp. | CG048 | Mine contractor | — |
| — | Onyett Fabricators | CB328 | Mine contractor | — |
| — | Open Loop Energy | C3LG | Mine contractor | — |
| — | Oppscat | CC1563 | Mine contractor | — |
| — | Opterra Solutions Inc | CA7512 | Mine contractor | — |
| — | Optimal Air Testing Services Inc. | CH690 | Mine contractor | — |
| — | Optimum Crush | CC8065 | Mine contractor | — |
| — | Optimum Electrical Services llc. | CC3766 | Mine contractor | — |
| — | Optimus Solutions, Inc. | CC0626 | Mine contractor | — |
| — | Oracle Electric Service, LLC. | CA0657 | Mine contractor | — |
| — | Oracle Elevator Holdco Inc | CC0457 | Mine contractor | — |
| — | Orange County Scaffold Inc | C9MA | Mine contractor | — |
| — | Orbital Engineering Inc | CMD5 | Mine contractor | — |
| — | Ore Grade LLC | CC5588 | Mine contractor | — |
| — | Oregon Electric Const Inc | CG095 | Mine contractor | — |
| — | Orica USA Alaska Division | CB5234 | Mine contractor | — |
| — | Orica USA Midwest | CB5232 | Mine contractor | — |
| — | Orica USA Northeast | CB5230 | Mine contractor | — |
| — | Orica USA Southeast | CB5231 | Mine contractor | — |
| — | Orica USA Southwest | CB5233 | Mine contractor | — |
| — | Origin Electric LLC | CC8152 | Mine contractor | — |
| — | Orlando Diefenderfer Electrica | CPIP | Mine contractor | — |
| — | Orr Protection Systems | CY098 | Mine contractor | — |
| — | Orrison Maintenance Service | CJMZ | Mine contractor | — |
| — | Ortiz Engineering Consulting Services LLC | CC8823 | Mine contractor | — |
| — | Ortiz Stfg Corp | CC2356 | Mine contractor | — |
| — | OSC, Inc. | C4JE | Mine contractor | — |
| — | Oscar J Boldt Construction Co | CT9L | Mine contractor | — |
| — | Osi Environmental Inc | CFFJ | Mine contractor | — |
| — | Osmers Equipment Repair | CC3262 | Mine contractor | — |
| — | Oswald Hauling, Inc | CC9215 | Mine contractor | — |
| — | Ott Electrical Service | CWSP | Mine contractor | — |
| — | Outlander Welding and Fabricating LLC | CC7789 | Mine contractor | — |
| — | Overland Conveying Systems LLC | CH251 | Mine contractor | — |
| — | Overland Systems Inc | CRMS | Mine contractor | — |
| — | Owens Electric Co. | CU210 | Mine contractor | — |
| — | Oxford Construction Company | CB9640 | Mine contractor | — |
| — | P & B Electric Co., LLC | CF845 | Mine contractor | — |
| — | P & B Trucking | CK288 | Mine contractor | — |
| — | P & D Electric Inc | CTDM | Mine contractor | — |
| — | P & M Brick, LLC | CA0502 | Mine contractor | — |
| — | P & N Chacon | CB5854 | Mine contractor | — |
| — | P & P Construction Inc | CB097 | Mine contractor | — |
| — | P & S Scale Co.,Inc. | CQ360 | Mine contractor | — |
| — | P B S Bluestone | CZBZ | Mine contractor | — |
| — | P F Sherman Co Inc | CNTI | Mine contractor | — |
| — | P. Flanigan and Sons | CB7193 | Mine contractor | — |
| — | P.W. Gillibrand Logistics , LLC | CC6111 | Mine contractor | — |
| — | Paa River Construction, LLC | CS731 | Mine contractor | — |
| — | PAC Construction Supply, LLC | CC9018 | Mine contractor | — |
| — | Pace Analytical® Services, LLC | CX837 | Mine contractor | — |
| — | Pacific Hide & Fur DBA: Pacific Steel & Recycling | CBLK | Mine contractor | — |
| — | Pacific Industrial Constructors Inc. | CB1219 | Mine contractor | — |
| — | Pacific Petroleum California, | CA8385 | Mine contractor | — |
| — | Pacific Standard Environmental, Inc. | CC2064 | Mine contractor | — |
| — | Pacific States Environmental Contractors, Inc. | CC5791 | Mine contractor | — |
| — | Packard Electric Inc | CCC8 | Mine contractor | — |
| — | Packard Electric Inc. | CA9939 | Mine contractor | — |
| — | Padgett Steel Rj | CEC4 | Mine contractor | — |
| — | Page Transport Inc. | CA2246 | Mine contractor | — |
| — | Paguay Stone LLC | CB2399 | Mine contractor | — |
| — | Pajaro Valley Electric Inc | CX59 | Mine contractor | — |
| — | Palmer Land Management | CC3472 | Mine contractor | — |
| — | Palmetto Deco Crete | CC9599 | Mine contractor | — |
| — | Palmetto Industrial Services | C4BV | Mine contractor | — |
| — | Palmetto Mining Inc | C1SI | Mine contractor | — |
| — | Palmetto Rock Service | CA394 | Mine contractor | — |
| — | Palmetto State Training & Consulting Inc. | CF293 | Mine contractor | — |
| — | Pan America Electric, Inc. | CH094 | Mine contractor | — |
| — | Pan America Industries | CC4488 | Mine contractor | — |
| — | Pankratz Trucking, LLC | CA9817 | Mine contractor | — |
| — | PANY & LENTZ ENGINEERING COMPANY | CG829 | Mine contractor | — |
| — | Pape Kenworth | CB1173 | Mine contractor | — |
| — | Pape Machinery Inc. | CN210 | Mine contractor | — |
| — | Pape Material Handling Inc. | CA4636 | Mine contractor | — |
| — | Papich Construction Company, Inc | CP599 | Mine contractor | — |
| — | Paradigm Electric, LLC | CC7219 | Mine contractor | — |
| — | Paragon Site Solutions, LLC | CC8281 | Mine contractor | — |
| — | Paramont Contura, LLC | CF433 | Mine contractor | — |
| — | Parisi Construction, LLC | CC4495 | Mine contractor | — |
| — | Park Way Plumbing Inc | CY821 | Mine contractor | — |
| — | Parker Construction | C1DN | Mine contractor | — |
| — | Parker's Crane Service Inc. | CR659 | Mine contractor | — |
| — | Parker's Heating & Air Conditioning, inc. | CN527 | Mine contractor | — |
| — | Parkhouse Tire Inc | CA449 | Mine contractor | — |
| — | Parks Drilling Company Inc | C3KX | Mine contractor | — |
| — | Parsons Bros Rockeries | C8VJ | Mine contractor | — |
| — | Parsons Steel Erectors Inc | CFF6 | Mine contractor | — |
| — | Partner Industrial | CB6562 | Mine contractor | — |
| — | Patrick Henry Well Drilling | C7NX | Mine contractor | — |
| — | Patrick Landscaping | CB9715 | Mine contractor | — |
| — | Patrick Trucking | CHEH | Mine contractor | — |
| — | Patriot Construction and Industrial | CB6578 | Mine contractor | — |
| — | Patriot Crane & Rigging/Patriot Overhead & Hoist | CA9926 | Mine contractor | — |
| — | Patriot Drilling Service | CS567 | Mine contractor | — |
| — | Patriot Industrial Services, LLC. | CB8796 | Mine contractor | — |
| — | Patriot Safety Services, Inc. | CB3733 | Mine contractor | — |
| — | Patterson enterprises | CB5655 | Mine contractor | — |
| — | Patterson Exploration Services | C1WR | Mine contractor | — |
| — | Patterson Trucking | CB7938 | Mine contractor | — |
| — | Paul & Company | CB2271 | Mine contractor | — |
| — | Paul Hogg Trucking Inc | CKNM | Mine contractor | — |
| — | Paul's Machine & Welding Corp. | CJ499 | Mine contractor | — |
| — | Paul'S Repair Shop Inc | CRUF | Mine contractor | — |
| — | Paulus Lawn & Landscaping LLC | CC6647 | Mine contractor | — |
| — | Paul¿s Electrical Services | CC6707 | Mine contractor | — |
| — | Payne & Dolan Inc | C3CD | Mine contractor | — |
| — | Payseur's Welding Service | CB4182 | Mine contractor | — |
| — | PCA Engineering, Inc. | CV1L | Mine contractor | — |
| — | PCI | CA048 | Mine contractor | — |
| — | PCM Industrial Services Inc. | CWAV | Mine contractor | — |
| — | PDQ Auto Center LLC | CC5822 | Mine contractor | — |
| — | PDR Repair | CB3819 | Mine contractor | — |
| — | PE Harris Construction Inc. | CC6799 | Mine contractor | — |
| — | Peach Bottom Logging LLC | CC8172 | Mine contractor | — |
| — | Peach State Electric Of Sandersville Llc. | CC7929 | Mine contractor | — |
| — | Pearson Construction LLC | CA9078 | Mine contractor | — |
| — | Pearson Construction, Inc. | CB8341 | Mine contractor | — |
| — | Pearson Pump sales & Service | CB8530 | Mine contractor | — |
| — | Pebblestone Irrigation and Landscapes, LLC | CB3178 | Mine contractor | — |
| — | Peed Bros Inc | C9MJ | Mine contractor | — |
| — | Peed Equipment Co | CMUF | Mine contractor | — |
| — | Peerless Service and Repair LLC. | CB4596 | Mine contractor | — |
| — | PEI-FAB LLC | CC4012 | Mine contractor | — |
| — | Penn Line Energy T&D, Inc. | CB68 | Mine contractor | — |
| — | PennCore Consulting LLC | CB9396 | Mine contractor | — |
| — | PENTA Engineering Co. LLC | CA9325 | Mine contractor | — |
| — | Penta Industrial Corp | C5BE | Mine contractor | — |
| — | People 2.0 Industrial LLC | CB9358 | Mine contractor | — |
| — | PEOPLESERVICE INC. | CA7365 | Mine contractor | — |
| — | Perco Rock Company | CC1675 | Mine contractor | — |
| — | Performance Abatement Services | CC1893 | Mine contractor | — |
| — | Performance Contracting Inc | C3XQ | Mine contractor | — |
| — | Performance Contractors Inc | CYRL | Mine contractor | — |
| — | Performance Drilling of Payson | CH879 | Mine contractor | — |
| — | Performance Industrial Contractors | CC5176 | Mine contractor | — |
| — | Performance Industries, LLC | CB4071 | Mine contractor | — |
| — | Perks Dragline Service, Inc. | CS054 | Mine contractor | — |
| — | Perma Tronic, Inc. | CL264 | Mine contractor | — |
| — | Perrault Equipment Rental | CH822 | Mine contractor | — |
| — | Perreca Electric Company Inc. | CT388 | Mine contractor | — |
| — | PERRINE INDUSTRIAL ELECTRICIANS INC | CK893 | Mine contractor | — |
| — | Personal Touch, Inc. | CF223 | Mine contractor | — |
| — | Peska Construction, Inc. | CC8968 | Mine contractor | — |
| — | Pet Construction | CLIK | Mine contractor | — |
| — | Pete's tire barns | CB8815 | Mine contractor | — |
| — | Peterman Excavating | CA3644 | Mine contractor | — |
| — | Peters Equipment Company LLC | CA7496 | Mine contractor | — |
| — | Peterson CAT | CM7I | Mine contractor | — |
| — | Peterson Contracting | CB681 | Mine contractor | — |
| — | Peterson Contractors Inc | CTXC | Mine contractor | — |
| — | Peterson Electritions | CC8540 | Mine contractor | — |
| — | Peterson Rock, Inc. | CA3920 | Mine contractor | — |
| — | Petitto Mine Equip Inc | CLVA | Mine contractor | — |
| — | Petra Drilling Inc | CW701 | Mine contractor | — |
| — | Petro Electric | CC9732 | Mine contractor | — |
| — | PetroChem | CV7D | Mine contractor | — |
| — | Petroleum Equipment & Service, Inc | CC6233 | Mine contractor | — |
| — | Petroleum Tec | CB0532 | Mine contractor | — |
| — | Petron Corporation | CC2056 | Mine contractor | — |
| — | Petros services | CC1647 | Mine contractor | — |
| — | Pewag, Inc. | CU539 | Mine contractor | — |
| — | PH2O | CB2895 | Mine contractor | — |
| — | Phares Fry Well Drilling & Pump Service Inc. | CJ931 | Mine contractor | — |
| — | Phibion USA, Inc. | CC8857 | Mine contractor | — |
| — | Phillippi-Hagenbuch Inc | CSUR | Mine contractor | — |
| — | Phillips Electrical Technologies, LLC | CJ196 | Mine contractor | — |
| — | Phillips Grading, Inc. | CA4551 | Mine contractor | — |
| — | Phillips Heavy INC | CB3687 | Mine contractor | — |
| — | Phillips Heavy, Inc. | CRAA | Mine contractor | — |
| — | Phillips Industiral Electric | CB310 | Mine contractor | — |
| — | Phillips Welding | CKWA | Mine contractor | — |
| — | Philpot Tractor, Inc. | CA2338 | Mine contractor | — |
| — | Phipps Equipment Services, LLC | CC4803 | Mine contractor | — |
| — | Phoenix Crane Rental Company | CL157 | Mine contractor | — |
| — | Phoenix Industrial Inc | CE757 | Mine contractor | — |
| — | Phoenix Mining | CC1216 | Mine contractor | — |
| — | Phoenix National Laboratories, LLC | CK376 | Mine contractor | — |
| — | Phos Electrical | CA3079 | Mine contractor | — |
| — | PhosChem Supply Co. | CE346 | Mine contractor | — |
| — | Pi-Tech, INC | CB7223 | Mine contractor | — |
| — | Pickett and Associates, LLC | CC7117 | Mine contractor | — |
| — | Picou Group Contractors LLC | CB8569 | Mine contractor | — |
| — | Picture Perfect Cleaning Services | CW315 | Mine contractor | — |
| — | Piedmont Drilling & Blasting Inc. | CTWV | Mine contractor | — |
| — | Piedmont Lawn and Land Management | CB6543 | Mine contractor | — |
| — | Piedmont Maintenance and Services of Roxboro | CC4997 | Mine contractor | — |
| — | Piedmont Mining, LLC | CB2884 | Mine contractor | — |
| — | PIEDMONT SERVICE GROUP | CA5306 | Mine contractor | — |
| — | Pieper Electric, Inc. | CF861 | Mine contractor | — |
| — | Pierce County Security, Inc. | CG967 | Mine contractor | — |
| — | Pikes Creek Site Contractors | CS616 | Mine contractor | — |
| — | Pile Construction | CN544 | Mine contractor | — |
| — | Pillar Innovations, LLC | CQ374 | Mine contractor | — |
| — | Pillars Welding/Fabrication and Trade Services | CC7362 | Mine contractor | — |
| — | Pilot Knob Drilling & Blasting LLC | CC6294 | Mine contractor | — |
| — | Pima Paving Inc | CMTD | Mine contractor | — |
| — | Pine Knoll Construction | C8LQ | Mine contractor | — |
| — | Pinion Exploration Inc. | CK920 | Mine contractor | — |
| — | PINK GRADING INC. | CF466 | Mine contractor | — |
| — | PinneY Dozer | CC2775 | Mine contractor | — |
| — | Pioneer Diesel | CC9788 | Mine contractor | — |
| — | Pioneer Equipment Inc | CPJT | Mine contractor | — |
| — | Pioneer Technical Services, Inc. | CK515 | Mine contractor | — |
| — | PIPE PROS INC. | CB9175 | Mine contractor | — |
| — | Pipeco LLC | CA2575 | Mine contractor | — |
| — | Pipeline Video Inspection, LLC dba AIMS Companies | CQ730 | Mine contractor | — |
| — | Piper Electric LLC | CC2434 | Mine contractor | — |
| — | Piqua Steel Co | CRN3 | Mine contractor | — |
| — | Piteau Associates USA LTD | CB4728 | Mine contractor | — |
| — | Pitt Pipeline Company Inc. | CC9148 | Mine contractor | — |
| — | Pittman Industrial LLC | CC7270 | Mine contractor | — |
| — | Pitts Electric Company, Inc. | CF114 | Mine contractor | — |
| — | Pittsburgh Tire Service Inc | CC784 | Mine contractor | — |
| — | Plant Fabricators Inc | CIZD | Mine contractor | — |
| — | Plant Maintenace and Construction | CC7873 | Mine contractor | — |
| — | Plant Systems Incorporated | CA3385 | Mine contractor | — |
| — | Plattco Corporation | CA7078 | Mine contractor | — |
| — | plumb line mechanical | CJ414 | Mine contractor | — |
| — | Plutchak Fab LLC | CB6688 | Mine contractor | — |
| — | Plymouth Locomotive Service, LLC | CSPM | Mine contractor | — |
| — | PND Engineers, Inc. | CS973 | Mine contractor | — |
| — | Pogue Brothers Construction | CB4069 | Mine contractor | — |
| — | Poindexter Excavating Inc | CPUH | Mine contractor | — |
| — | Pole Line Contractors Inc. | CH134 | Mine contractor | — |
| — | Pole Set Inc | CIFX | Mine contractor | — |
| — | Polino Contracting Inc | CKEA | Mine contractor | — |
| — | Pollard & Sons Excavating | CF817 | Mine contractor | — |
| — | Polydeck Screen Corporation | CE611 | Mine contractor | — |
| — | Pomp's Tire Service | CB660 | Mine contractor | — |
| — | Poncove, Inc. | CF317 | Mine contractor | — |
| — | Pondera Services | CA1307 | Mine contractor | — |
| — | Poorman'S Welding & Fabricatio | C4KS | Mine contractor | — |
| — | Pop's Welding on Site, LLC | CB9291 | Mine contractor | — |
| — | Poquette Leasing | CE753 | Mine contractor | — |
| — | Porbeck Engineering Corp. | CA2296 | Mine contractor | — |
| — | Port Corpus Terminal, Inc. | CA7452 | Mine contractor | — |
| — | Port-A-Jon | CA0583 | Mine contractor | — |
| — | Portable Machine tools Inc | CC8545 | Mine contractor | — |
| — | Porter Scales | CY354 | Mine contractor | — |
| — | Potesta & Associates Inc | CZUN | Mine contractor | — |
| — | Potter Oil & Tire Company, Inc. | CQ500 | Mine contractor | — |
| — | Pounds Septic Servic | CC0609 | Mine contractor | — |
| — | Powder River Heating & Air Con | CM0P | Mine contractor | — |
| — | Powell Construction Company, Inc. | CU25 | Mine contractor | — |
| — | Powell Construction WV, LLC | CC3662 | Mine contractor | — |
| — | Power and Rubber Supply, Inc. | CH155 | Mine contractor | — |
| — | Power City Electric, Inc. | CM049 | Mine contractor | — |
| — | Power Equipment Co | CS66 | Mine contractor | — |
| — | Power Equipment Co | CT9I | Mine contractor | — |
| — | Power Equipment Company of Memphis | CC2362 | Mine contractor | — |
| — | Power Motive Corp | CIA2 | Mine contractor | — |
| — | Power Moves | CC5986 | Mine contractor | — |
| — | Power Scaffold Services | CM245 | Mine contractor | — |
| — | Power Screen of Connecticut Inc. | CN338 | Mine contractor | — |
| — | Power Screening | CC5014 | Mine contractor | — |
| — | Power Supply Industry | CAXI | Mine contractor | — |