| — | Bell Trucking Co. | CF684 | Mine contractor | — |
| — | Bellavance & Roy LLC | CA6776 | Mine contractor | — |
| — | Bellbrook Transport | CA0695 | Mine contractor | — |
| — | Belles Property Management, LLC | CC8410 | Mine contractor | — |
| — | Belt Power | CA2389 | Mine contractor | — |
| — | Belt Tech Industrial Inc | CVIT | Mine contractor | — |
| — | Beltco Services LLC | CB4916 | Mine contractor | — |
| — | Beltline Electric Co., Inc. | CG676 | Mine contractor | — |
| — | Bemrich Electric & Telephone, Inc. | CE749 | Mine contractor | — |
| — | Benchmark Drilling, LLC | CUFQ | Mine contractor | — |
| — | Benchmark Excavating, LLC | CB8785 | Mine contractor | — |
| — | Benchmark Industrial Services, Inc | CCTP | Mine contractor | — |
| — | Bend Commercial Tire Company Inc | CC5188 | Mine contractor | — |
| — | Benetech Inc | CNRK | Mine contractor | — |
| — | Bengal Crane and Rigging, LLC | CB7680 | Mine contractor | — |
| — | BENNETT ELECTRIC | CC2339 | Mine contractor | — |
| — | Bennett Steel Inc. | CC3133 | Mine contractor | — |
| — | Bennoc Inc | CC500 | Mine contractor | — |
| — | Benson Electric Company Inc | CUJW | Mine contractor | — |
| — | Beran Concrete, Inc | CC6062 | Mine contractor | — |
| — | Bermont Materials | CC9515 | Mine contractor | — |
| — | Berner Trucking | CTZK | Mine contractor | — |
| — | Berry Enterprises | CJXN | Mine contractor | — |
| — | Berry Tractor & Equipment Company | CY900 | Mine contractor | — |
| — | Berthold Technologies USA LLC | CA0510 | Mine contractor | — |
| — | Best Axle Repair LLC | CC6871 | Mine contractor | — |
| — | Best Line Leasing | C4IX | Mine contractor | — |
| — | Best One Kentuckiana | CH615 | Mine contractor | — |
| — | Best One Tire | CH180 | Mine contractor | — |
| — | Best One Tire & Service of Mid America, Inc. | CT258 | Mine contractor | — |
| — | Best One Tire of Chattanooga | CU888 | Mine contractor | — |
| — | Best Practice Medicine | CC4681 | Mine contractor | — |
| — | Best-One of Indy | CB9705 | Mine contractor | — |
| — | Bestway Electric Motor Service | CKBD | Mine contractor | — |
| — | Better Pumps and Solutions, LLC | CC7667 | Mine contractor | — |
| — | Betts Environmental | CC4682 | Mine contractor | — |
| — | Beumer Corporation | CS2H | Mine contractor | — |
| — | Bevins Crane Service | CZ624 | Mine contractor | — |
| — | BH millwright LLC | CC3802 | Mine contractor | — |
| — | Big Blue Trucking, Inc. | CQ158 | Mine contractor | — |
| — | Big Crater LLC | CC7699 | Mine contractor | — |
| — | Big Dog Repair and Technical Services Inc. | CB8929 | Mine contractor | — |
| — | Big Electric Co. | CT557 | Mine contractor | — |
| — | Big Horn Tire Inc | CBNW | Mine contractor | — |
| — | Big Red Crane Company Inc. | CC8487 | Mine contractor | — |
| — | Big Rock Exploration | CC5094 | Mine contractor | — |
| — | Big Sandy Construction Inc. | CQ327 | Mine contractor | — |
| — | Big Sky Crane Repair Inc | CS059 | Mine contractor | — |
| — | Big Sky Portables, LLC | CC6427 | Mine contractor | — |
| — | Big Sky Septic Co | CB888 | Mine contractor | — |
| — | Big Sky Steel and Salvage Inc | CA4036 | Mine contractor | — |
| — | Big-D Industrial | CC3742 | Mine contractor | — |
| — | Bighorn Industries | CC6187 | Mine contractor | — |
| — | Bill Snoddy Construction | CM754 | Mine contractor | — |
| — | Billett Electric | C1CI | Mine contractor | — |
| — | Billings Crane & Mechanical Inc | CZ251 | Mine contractor | — |
| — | Billy Bob's Repair & Tire | CC5025 | Mine contractor | — |
| — | Billy R Sponaugle Trucking LLC | CB5577 | Mine contractor | — |
| — | Billyn Corp | CNMX | Mine contractor | — |
| — | Bindl Bauer Limestone of Spring Green, Inc | CZ813 | Mine contractor | — |
| — | BINKELMAN CORPORATION | CB3988 | Mine contractor | — |
| — | Binns & Stevens Explosives Inc | CVP9 | Mine contractor | — |
| — | Bionomic Trucking Inc | CB6261 | Mine contractor | — |
| — | Birtley Industrial Equipment Corporation | CA7378 | Mine contractor | — |
| — | Bisco Refactories | CQ045 | Mine contractor | — |
| — | Bishop and Buttery, Inc. | CP348 | Mine contractor | — |
| — | Bishop stone | CB0964 | Mine contractor | — |
| — | Bison Engineering Inc | CA5633 | Mine contractor | — |
| — | Bison Equipment Rental | CD0248 | Mine contractor | — |
| — | BIT Construction LLC | CA2816 | Mine contractor | — |
| — | Bitterroot Safety and Consulting Services, LLC | CC4870 | Mine contractor | — |
| — | BJ Electric | CA0417 | Mine contractor | — |
| — | BJ Nelson, INC. | CU604 | Mine contractor | — |
| — | BKI Services, LLC | CC6654 | Mine contractor | — |
| — | Bks Environmental Assoc Inc | CGIR | Mine contractor | — |
| — | Black Brim LLC | CC0529 | Mine contractor | — |
| — | Black Canyon Process Equipment | CN088 | Mine contractor | — |
| — | Black Cloud Mining & Drilling LLC | CC8711 | Mine contractor | — |
| — | Black Gold Transport LLC | CC4665 | Mine contractor | — |
| — | Black Gold Trucking, LLC | CC008 | Mine contractor | — |
| — | Black Hawk Crane & Rigging Inc | CPU6 | Mine contractor | — |
| — | Black Mountain Fabrication | CD0137 | Mine contractor | — |
| — | Black Rock Mining Services LLC | CC6973 | Mine contractor | — |
| — | Black Sheep Oilfield Services, LLC. | CB3271 | Mine contractor | — |
| — | Black Timber Industrial, LLC | CC3184 | Mine contractor | — |
| — | Black's Excavation LLC | CE447 | Mine contractor | — |
| — | Black's Tire and Auto Service | CC0378 | Mine contractor | — |
| — | Blackburn Metalworx | CC9720 | Mine contractor | — |
| — | Blackford Construction & Repair | CA5003 | Mine contractor | — |
| — | Blackhole Technologies, Inc. | CC8388 | Mine contractor | — |
| — | Blackjack Transport LLC | CA5128 | Mine contractor | — |
| — | Blacks Welding, LLC | CB4566 | Mine contractor | — |
| — | Blackstone Security Services | CC7563 | Mine contractor | — |
| — | Blackstone Security Services, Inc. | CB6971 | Mine contractor | — |
| — | Blake & Pendleton | CC880 | Mine contractor | — |
| — | Blalock Companies | CA356 | Mine contractor | — |
| — | Blanchard Machinery Co | C1BU | Mine contractor | — |
| — | Blasting Technology Inc | CKND | Mine contractor | — |
| — | Blooming Glen Contractors Inc | CNWI | Mine contractor | — |
| — | Bloomsdale Excavating Co Inc | CGN2 | Mine contractor | — |
| — | Blue Coast Insulation LLC | CC1851 | Mine contractor | — |
| — | Blue Collar Sales & Service | CB9672 | Mine contractor | — |
| — | Blue Gold Mine Services, LLC | CB7529 | Mine contractor | — |
| — | Blue Legacy Innovations, LLC | CC6007 | Mine contractor | — |
| — | Blue Line Services Inc | CC168 | Mine contractor | — |
| — | Blue Moon Waste Disposal, LLC | CX811 | Mine contractor | — |
| — | Blue Mountain Air Compressor Service LLC. | CC1826 | Mine contractor | — |
| — | Blue Mountain Drilling | CS148 | Mine contractor | — |
| — | Blue Ridge Truck Tire | CT453 | Mine contractor | — |
| — | Blue Stone Inc | CUQS | Mine contractor | — |
| — | Bluebird Construction, Inc. | CA3730 | Mine contractor | — |
| — | Bluff City Minerals | CA3496 | Mine contractor | — |
| — | Blythe Development, LLC | C1HT | Mine contractor | — |
| — | Blythe Industries | CN0U | Mine contractor | — |
| — | BMC Aggregates LC | CH8Y | Mine contractor | — |
| — | BMF Electric Inc | CC2941 | Mine contractor | — |
| — | BMG Conveyor Services of Florida, Inc. | CV482 | Mine contractor | — |
| — | BMV Inc | CC8576 | Mine contractor | — |
| — | BNB HEATING COOLING & ELECTRIC, L.L.C. | CA0054 | Mine contractor | — |
| — | BnS Contracting solutions | CC5066 | Mine contractor | — |
| — | Boart Longyear Company | CY12 | Mine contractor | — |
| — | Bob Sumerel Tire Co., Inc. | CB4572 | Mine contractor | — |
| — | Bob's Dozer Service | CFZF | Mine contractor | — |
| — | Bobcat Enterprises, Inc. | CA1894 | Mine contractor | — |
| — | Bocook Engineering Inc | CZR9 | Mine contractor | — |
| — | Bodell Construction Co | CYUD | Mine contractor | — |
| — | Bolinder Resources LLC | CZ885 | Mine contractor | — |
| — | Bolton & Menk Inc. | CC7620 | Mine contractor | — |
| — | Bomats Monument Equipment Ltd | CA471 | Mine contractor | — |
| — | Bookcliff Sales Inc | CC417 | Mine contractor | — |
| — | Bookout Excavation LLC | CC6064 | Mine contractor | — |
| — | Boozel Contracting | CV033 | Mine contractor | — |
| — | Borton Construction Company, LLC | CA129 | Mine contractor | — |
| — | Bosk, Inc. | CLNP | Mine contractor | — |
| — | Boss Oilfield | CC9062 | Mine contractor | — |
| — | Boss Tanks, Inc. | CA2091 | Mine contractor | — |
| — | Boston Hill Enterprises LLC | CC1584 | Mine contractor | — |
| — | Bouille Electric Inc | CB059 | Mine contractor | — |
| — | Boulder Creek Construction & Excavating, LLC | CY967 | Mine contractor | — |
| — | Boulder Express LLC | CX853 | Mine contractor | — |
| — | BOULEVARD TIRE | CM306 | Mine contractor | — |
| — | Bourdeaux Enterprises Inc | CZ325 | Mine contractor | — |
| — | Bower Bros Construction | CJBP | Mine contractor | — |
| — | Bowlin Enterprises LLC | CC8416 | Mine contractor | — |
| — | Bowman Consulting | CA5984 | Mine contractor | — |
| — | Bowman Equipment LLC | CC9903 | Mine contractor | — |
| — | Boyd Company | CC1571 | Mine contractor | — |
| — | BR Excavating, LLC | CC7202 | Mine contractor | — |
| — | Brad Martin Trucking | CK449 | Mine contractor | — |
| — | Brad Tweed Mechanical Services | CC3407 | Mine contractor | — |
| — | Bradford Brothers Asphalt & Co | CPHU | Mine contractor | — |
| — | Bradken | CC0805 | Mine contractor | — |
| — | Bradley Electric | CL865 | Mine contractor | — |
| — | Bradshaw Logging & Landscaping | CZDJ | Mine contractor | — |
| — | Brady Welding & Machine Shop, LLC | CX036 | Mine contractor | — |
| — | Bragg Crane Service | C6KB | Mine contractor | — |
| — | Brahma Group, Inc. | CH409 | Mine contractor | — |
| — | Brakefield Equipment, Inc. | CC3889 | Mine contractor | — |
| — | Bramco Inc | CBM0 | Mine contractor | — |
| — | Branch Civil Inc | CD150 | Mine contractor | — |
| — | Branch Electric Inc | C9HD | Mine contractor | — |
| — | Brand Industrial Services Inc. | CD405 | Mine contractor | — |
| — | Brandenburg Industrial Service Company | CG973 | Mine contractor | — |
| — | Brandon & Clark Inc. | CZ158 | Mine contractor | — |
| — | Brandt Excavating | CB0278 | Mine contractor | — |
| — | Brandywine Explosives & Supply | CFHW | Mine contractor | — |
| — | Branham-Mingis Industrial Prod | CXM3 | Mine contractor | — |
| — | Brantley Repair LLC | CC2792 | Mine contractor | — |
| — | Brashier Equipment Repair | CT430 | Mine contractor | — |
| — | Braswell Scale & Equip Co Inc | CB927 | Mine contractor | — |
| — | Bratton Industrial Construction Inc. | CC8058 | Mine contractor | — |
| — | Braun Electric Co Inc | C1TU | Mine contractor | — |
| — | Brazos Valley Contracting Co | CLAB | Mine contractor | — |
| — | Brechbuhler Scales Inc | CM97 | Mine contractor | — |
| — | Breen and Sullivan Mech | CC7588 | Mine contractor | — |
| — | Breiner Contracting Inc. | CB0528 | Mine contractor | — |
| — | Brennan Marine Inc. | CC6098 | Mine contractor | — |
| — | Brenntag Pacific, Inc. | CW309 | Mine contractor | — |
| — | Brenny's Sanitary Service LLC | CC7621 | Mine contractor | — |
| — | Brent Powers Construction | CG507 | Mine contractor | — |
| — | Bressler Drilling | CB7592 | Mine contractor | — |
| — | Brewer Industrial Services Inc | CB030 | Mine contractor | — |
| — | Brice Equipment, LLC | CC9358 | Mine contractor | — |
| — | Bridge Gap Engineering, LLC | CA6926 | Mine contractor | — |
| — | Bridgesource | CC7625 | Mine contractor | — |
| — | Bridgestone HosePower, LLC. | CQ237 | Mine contractor | — |
| — | Briggs Brothers Construction, LLC | CC7557 | Mine contractor | — |
| — | Briggs Electric Inc. | CT726 | Mine contractor | — |
| — | Bright Scaffolding LLC | CC3017 | Mine contractor | — |
| — | Brighton Crane Rental | CH892 | Mine contractor | — |
| — | Brink Farms | CR897 | Mine contractor | — |
| — | Brinks Land Improvement Inc | CC8996 | Mine contractor | — |
| — | Britton Portable Welding | CB3280 | Mine contractor | — |
| — | Broadbent & Assoc | CVPY | Mine contractor | — |
| — | Broadway Electric Inc | C2VR | Mine contractor | — |
| — | Brookwood Oilfield Service | CR2T | Mine contractor | — |
| — | Brothers Welding and Fabrication | CY689 | Mine contractor | — |
| — | Brown & Caldwell | CUQR | Mine contractor | — |
| — | Brown Enterprises | CC5604 | Mine contractor | — |
| — | Brown Plumbing | CC4336 | Mine contractor | — |
| — | Brown Transport Inc | CC8617 | Mine contractor | — |
| — | Brown's Heavy Equipment, Inc. | CR787 | Mine contractor | — |
| — | Brown's Industrial Crane Solutions, Inc. | CC7513 | Mine contractor | — |
| — | Brown's Welding, Inc. | CG991 | Mine contractor | — |
| — | Browning Electric Company Inc. | CK324 | Mine contractor | — |
| — | Brubacher Excavating Inc | CA269 | Mine contractor | — |
| — | Bruin Builders LLC | CC7577 | Mine contractor | — |
| — | Brunel Energy Inc | CA6624 | Mine contractor | — |
| — | Brunel Resources Inc | CB4376 | Mine contractor | — |
| — | Brunner & Lay, Inc. | CA1929 | Mine contractor | — |
| — | Brute Force Contracting, LLC | CC8905 | Mine contractor | — |
| — | Brute Force Energy Services LLC | CB9327 | Mine contractor | — |
| — | Bryant Industconstco | CIHD | Mine contractor | — |
| — | Bryce Saylor & Sons Inc | CKFF | Mine contractor | — |
| — | BSE Industrial Contractors, Inc | CIDL | Mine contractor | — |
| — | Btc Trucking Inc | CFGZ | Mine contractor | — |
| — | Buchanan Mechanical, Inc. | CP487 | Mine contractor | — |
| — | Buchanan Pump Serv & Supply Co | CXE6 | Mine contractor | — |
| — | Buckeye Construction | CA2M | Mine contractor | — |
| — | Buckeye Exterminating, Inc | CB1030 | Mine contractor | — |
| — | Buckeye Mineral Services, Inc. | CA1769 | Mine contractor | — |
| — | Buckley Powder Company | CSB9 | Mine contractor | — |
| — | Buckners Welding | CC3667 | Mine contractor | — |
| — | Bud Davis Trucking, Inc. | CT1T | Mine contractor | — |
| — | Bud's Electric | CA288 | Mine contractor | — |
| — | Budd Scale Inc | CHXX | Mine contractor | — |
| — | Buffalo Creek Explosives, Inc. | CH444 | Mine contractor | — |
| — | Buffalo Industrial Supply | CA1703 | Mine contractor | — |
| — | Bug Man Exterminating inc. | CB6274 | Mine contractor | — |
| — | Bul-Hed Corporation | CF991 | Mine contractor | — |
| — | Bul-Hed Environmental Corporation | CB9217 | Mine contractor | — |
| — | Bulk Aggregate Golf, Inc. | CJ310 | Mine contractor | — |
| — | Bulk Equipment Corp | CB6251 | Mine contractor | — |
| — | Bull's Eye Services, LLC | CB1488 | Mine contractor | — |
| — | Bullard Fabrication & Industrial Paint LLC | CC9692 | Mine contractor | — |
| — | Bulldog Trucking & Grading INC | CQ023 | Mine contractor | — |
| — | Bulldozin, Inc. | CL244 | Mine contractor | — |
| — | Bullert Industrial Electric Inc | CA8493 | Mine contractor | — |
| — | Bullock, Bennett & Associates | CC7604 | Mine contractor | — |
| — | Bundrick Rail Services, LLC. | CB9528 | Mine contractor | — |
| — | Bunkum Environmental Dust Solutions LLC | CC4578 | Mine contractor | — |
| — | Bunner & Sons Contracting | CCHM | Mine contractor | — |
| — | Burkholder's repair llc | CC9255 | Mine contractor | — |
| — | Burks Valley Sanitation | CNVH | Mine contractor | — |
| — | Burningham Enterprises | CA301 | Mine contractor | — |
| — | Burns & McDonnell | C2JW | Mine contractor | — |
| — | Burns Boys Co Inc | CB5213 | Mine contractor | — |
| — | Burress Construction Inc. | CR523 | Mine contractor | — |
| — | Burton Hydro-Vac Services, Inc. | CG848 | Mine contractor | — |
| — | Buschur Electric Inc | CA7480 | Mine contractor | — |
| — | Busted Knuckle Heavy Equipment Repair LLC | CC3107 | Mine contractor | — |
| — | Busy Bee Electric Inc | C6XC | Mine contractor | — |
| — | Butler Machinery Company | CR65 | Mine contractor | — |
| — | Butterfield Electric, Inc. | CC6215 | Mine contractor | — |
| — | Buttzy | CB3248 | Mine contractor | — |
| — | BW Industrial | CC4243 | Mine contractor | — |
| — | Bwc Trucking Co Inc | CSES | Mine contractor | — |
| — | BWF America | CQ659 | Mine contractor | — |
| — | BWI LLC | CC6621 | Mine contractor | — |
| — | C & H Services of North GA LLC | CB6194 | Mine contractor | — |
| — | C & J Transport, LLC | CF122 | Mine contractor | — |
| — | C & J Welding & Construction, LLC | C5DL | Mine contractor | — |
| — | C & L Machine & Welding Inc | CM9N | Mine contractor | — |
| — | C & L Service Inc | CH385 | Mine contractor | — |
| — | C & M Giant Tire | CA247 | Mine contractor | — |
| — | C & R Construction | CC092 | Mine contractor | — |
| — | C & R Construction and Consulting, LLC | CC7756 | Mine contractor | — |
| — | C & R Sales and Repairing, Inc. | CR124 | Mine contractor | — |
| — | C & T Enterprises, LLC | CR568 | Mine contractor | — |
| — | C & W Drilling | CMPH | Mine contractor | — |
| — | C and C Pumps and Supply, Inc. | CA8304 | Mine contractor | — |
| — | C and M Excavating llc | CC7473 | Mine contractor | — |
| — | C B Welding LLC | CA5738 | Mine contractor | — |
| — | C C C Construction Company Inc | C2SF | Mine contractor | — |
| — | C J Excavation LLC | CC3341 | Mine contractor | — |
| — | C J Hughes Construction Co., INC. | CBPG | Mine contractor | — |
| — | C J Moyna & Sons | CS1C | Mine contractor | — |
| — | C J's Well Service, Inc. | CK475 | Mine contractor | — |
| — | C L Boyd Company Inc | C3EZ | Mine contractor | — |
| — | C M F Inc | CXVE | Mine contractor | — |
| — | C M N Steel Fabricators | CZSK | Mine contractor | — |
| — | C Priest Construction LLC | CC7957 | Mine contractor | — |
| — | C R Meyer & Sons Company Inc | C1ZU | Mine contractor | — |
| — | C T I | CH4E | Mine contractor | — |
| — | C V B Industrial Contracting Inc. | C5BR | Mine contractor | — |
| — | C William Hetzer Inc | CA567 | Mine contractor | — |
| — | C&D Energy Services Inc. | CB4202 | Mine contractor | — |
| — | C&D Rigging | CA7819 | Mine contractor | — |
| — | C&F Fabricating,LLC. | CA6962 | Mine contractor | — |
| — | C&I Contractors Inc. | CB9055 | Mine contractor | — |
| — | C&M Pressure Washing LLC | CB9126 | Mine contractor | — |
| — | C&V Painting & Construction LLC | CC4080 | Mine contractor | — |
| — | C-2 Heavy Equipment Repair llc | CC4157 | Mine contractor | — |
| — | C. M. H. Services | CA8839 | Mine contractor | — |
| — | C. Terry Hunt Industries, Inc. | CFKN | Mine contractor | — |
| — | C.Boehne Construction LLC | CC0849 | Mine contractor | — |
| — | C.C. Jensen Inc. | CC0232 | Mine contractor | — |
| — | C.H. Reed | CY375 | Mine contractor | — |
| — | C.M. Dredging | CC6605 | Mine contractor | — |
| — | C.P.R. | CA6969 | Mine contractor | — |