| BMBarretts Minerals INC Wellsville Plant | Wellsville | OH | — | ◇ UNVERIFIED |
| BMBattle Mountain Grinding Plant | Battle Mountain | NV | — | ◇ UNVERIFIED |
| BBB & B Cedar Company, INC. | Waldron | AR | — | ◇ UNVERIFIED |
| BMBecker Minerals INC | Cheraw | SC | — | ◇ UNVERIFIED |
| BSBeemsterboer Slag CORP Contractor of Ar | East Chicago | IN | — | ◇ UNVERIFIED |
| BSBeemsterboer Slag Corporation a Contrac | Burns Harbor | IN | — | ◇ UNVERIFIED |
| BRBig River Industries Gravelite Division | Erwinville | LA | — | ◇ UNVERIFIED |
| BIBird Incorporated Granular | Norwood | MA | — | ◇ UNVERIFIED |
| BMBluegrass Materials Texas Quarry | Cockeysville | MD | — | ◇ UNVERIFIED |
| BDBo Dean CO INC - Windsor Recycle Plant | Windsor | CA | — | ◇ UNVERIFIED |
| BIB.p.i. (by-product Industries), INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| BRBuellflat Rock Company | Solvang | CA | — | ◇ UNVERIFIED |
| BIBurrell Industries INC. | New Kensington | PA | — | ◇ UNVERIFIED |
| CICalclean, INC. | Vacaville | CA | — | ◇ UNVERIFIED |
| CICanam Industries | Lovelock | NV | — | ◇ UNVERIFIED |
| CCCarbo Ceramics INC | New Iberia | LA | — | ◇ UNVERIFIED |
| CCCarbo Ceramics INC - Marshfield Plant | Marshfield | WI | — | ◇ UNVERIFIED |
| CCCarbo Ceramics INC. - Mcintyre Plant | Mcintyre | GA | — | ◇ UNVERIFIED |
| CGCarlton Global | Dunn | CA | — | ◇ UNVERIFIED |
| CPCarolina Perlite Company, INC. | Gold Hill | NC | — | ◇ UNVERIFIED |
| CPCarolina Perlite Company, INC. | Gold Hill | NC | — | ◇ UNVERIFIED |
| CSCarolina Stalite CO Aquadale Properties | Norwood | NC | — | ◇ UNVERIFIED |
| CCCarus Chemical CO | Ottawa | IL | — | ◇ UNVERIFIED |
| CCCastle Concrete CO Queens Canyon Quarry | Colorado Springs | CO | — | ◇ UNVERIFIED |
| CCCelite Corporation | Quincy | WA | — | ◇ UNVERIFIED |
| CMC-e Minerals Plants 1,2 and 6 | Andersonville | GA | — | ◇ UNVERIFIED |
| CMCharleston Mill Service | Huger | SC | — | ◇ UNVERIFIED |
| CMCharleston Mill Service | Huger | SC | — | ◇ UNVERIFIED |
| CPCimbar Performance Minerals | Mount Vernon | IN | — | ◇ UNVERIFIED |
| CMCity Materials Services, INC. | Hermitage | PA | — | ◇ UNVERIFIED |
| CCClariant Corporation - Quincy Operation | Quincy | FL | — | ◇ UNVERIFIED |
| CEClodine Expanded Shale & Clay Products | Richmond | TX | — | ◇ UNVERIFIED |
| CNC & N CORP. | Galena | KS | — | ◇ UNVERIFIED |
| CWCoast Wide Ready Mix | Tillamook | OR | — | ◇ UNVERIFIED |
| CMColeman Manufacturing | Everett | MA | — | ◇ UNVERIFIED |
| CMColombo Mine | Sierra City | CA | — | ◇ UNVERIFIED |
| CEComax Enterprises, INC. | Riverdale | IL | — | ◇ UNVERIFIED |
| CCContract Crushing Const - Patton Site | Belle Vernon | PA | — | ◇ UNVERIFIED |
| CICoorstek, Inc.- South Table Mountain | Golden | CO | — | ◇ UNVERIFIED |
| CLCornerstone - Lakeview Process Site | Lakeview | OR | — | ◇ UNVERIFIED |
| CICovia Isp, INC. | Fort Smith | AR | — | ◇ UNVERIFIED |
| CPCumberland Property | Cumberland | WA | — | ◇ UNVERIFIED |
| DSDennis Stewart Equipment Rental INC - Portable Crusher | Baton Rouge | LA | — | ◇ UNVERIFIED |
| DMDicaperl Minerals CORP. | Nashville | TN | — | ◇ UNVERIFIED |
| DMDicaperl Minerals Corporation | Socorro | NM | — | ◇ UNVERIFIED |
| DSDixon Southwestern Graphite INC | Lakehurst | NJ | — | ◇ UNVERIFIED |
| DDDracola Drilling and Completion Laboratory | Grand Forks | ND | — | ◇ UNVERIFIED |
| DSDuffek Sand & Gravel INC | Antigo | WI | — | ◇ UNVERIFIED |
| DSDuke Sherwood Contracting, INC. | Oroville | CA | — | ◇ UNVERIFIED |
| DQDunstone Quarry | Oroville | CA | — | ◇ UNVERIFIED |
