| AIAggregate Industries Wcr INC Franktown Ready Mix Plant | Franktown | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. -havana | Aurora | — | ◇ UNVERIFIED |
| AIAggregate Industries-wcr INC -ww Farms P | Greeley | — | ◇ UNVERIFIED |
| AAAll American Resourcse - North D-22 Pit | Delta | — | ◇ UNVERIFIED |
| ACAmes Construction Inc.cn | Aurora | — | ◇ UNVERIFIED |
| ARAndesite Rock CO | Longmont | — | ◇ UNVERIFIED |
| ARAndesite Rock Company | Henderson | — | ◇ UNVERIFIED |
| AGAnimas Glacier Gravel | Durango | — | ◇ UNVERIFIED |
| ARAult Ready Mix Lllp | Ault | — | ◇ UNVERIFIED |
| BCBasalite Concrete Products | Denver | — | ◇ UNVERIFIED |
| BCBasalite Concrete Solutions LLC | Fort Lupton | — | ◇ UNVERIFIED |
| BBB&b Blending INC | Denver | — | ◇ UNVERIFIED |
| BCBestway Concrete CO - Brighton | Brighton | — | ◇ UNVERIFIED |
| BCBestway Concrete CO - Ft Lupton | Fort Lupton | — | ◇ UNVERIFIED |
| BCBestway Concrete Co-longmont | Longmont | — | ◇ UNVERIFIED |
| BCBestway Concrete CO Windsor | Windsor | — | ◇ UNVERIFIED |
| BCBestway Concrete - Firestein Pit | Greeley | — | ◇ UNVERIFIED |
| BCBestway Concrete - the Shores | Firestone | — | ◇ UNVERIFIED |
| BLBestway - Lippman 4800cc 200607115 | Arvada Area | — | ◇ UNVERIFIED |
| BOBison Oil Well Cementing-109 N 6th Ave | Greeley | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix Company | Denver | — | ◇ UNVERIFIED |
| BBurnco | Kiowa | — | ◇ UNVERIFIED |
| BCBurnco Colorado - East Greeley Plant | Kersey | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Ft. Lupton Plant | Fort Lupton Area | — | ◇ UNVERIFIED |
| BCBurnco Colorado LLC - Colorado Springs (620) | Colorado Springs | — | ◇ UNVERIFIED |
| BCBurnco Colorado LLC - Colorado Springs (plant 621) | Colorado Springs | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Portable Screen/engine | Buena Vista | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Portable Screen/engine | Henderson | — | ◇ UNVERIFIED |
| CCCarder Concrete Products Company | Brighton | — | ◇ UNVERIFIED |
| CCCascade Const- Alliance Ready Mix | Delta Area | — | ◇ UNVERIFIED |
| CCCastle Concrete CO | El Paso County | — | ◇ UNVERIFIED |
| CCCastle Concrete CO - Pikeview Quarry | Colorado Springs | — | ◇ UNVERIFIED |
| CRCenter Redi Mix INC | Center | — | ◇ UNVERIFIED |
| CRCentral Ready Mix, LLC | Denver Area | — | ◇ UNVERIFIED |
| CAColorado Aggregate | San Acacio | — | ◇ UNVERIFIED |
| CWConcrete Works of Colorado - Port Plant | Lafayette | — | ◇ UNVERIFIED |
| CWConcrete Works of CO - Port. Conc. Batch | Monte Vista Area | — | ◇ UNVERIFIED |
| CCCoorstek - Ceramics | Colorado Springs | — | ◇ UNVERIFIED |
| CGCoorstek - Grand Junction Operations | Grand Junction | — | ◇ UNVERIFIED |
| CICoorstek, Inc.- South Table Mountain | Golden | — | ◇ UNVERIFIED |
| CCCotter Corp-cancelled 12/05/01 | Canon City | — | ◇ UNVERIFIED |
| CBCustom Building Products - Denc | Berkley | — | ◇ UNVERIFIED |
| DWDenver Water Department | Henderson | — | ◇ UNVERIFIED |
| DMDesigner Marble Dba Benray Designer Marb | Lakewood | — | ◇ UNVERIFIED |
| DCDfc Ceramics | Canon City | — | ◇ UNVERIFIED |
| DMDilleys Mobile Premix | Brush | — | ◇ UNVERIFIED |
| DRDorn Ready Mix | Fort Morgan | — | ◇ UNVERIFIED |
| ECE & C Precast Concrete, INC. | Littleton | — | ◇ UNVERIFIED |
| ECElam Clear Creek Batch Plant | Idaho Springs | — | ◇ UNVERIFIED |
| ESEldorado Stone (prev. Stonecraft) | Pueblo | — | ◇ UNVERIFIED |
