| BOBison Oil Well Cementing-109 N 6th Ave | Greeley | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix Company | Denver | — | ◇ UNVERIFIED |
| BCBurnco Colorado - East Greeley Plant | Kersey | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Ft. Lupton Plant | Fort Lupton Area | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Portable Screen/engine | Henderson | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Portable Screen/engine | Buena Vista | — | ◇ UNVERIFIED |
| CGCapitol Glass & Aluminum CORP | Aurora | — | ◇ 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 |
| CSClassic Surfaces Gj, LLC | Grand Junction | — | ◇ 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 |
| DMDilleys Mobile Premix | Brush | — | ◇ UNVERIFIED |
| DRDorn Ready Mix | Fort Morgan | — | ◇ UNVERIFIED |
| EGEagle Granite Unlimited | Minturn | — | ◇ UNVERIFIED |
| ECElam Clear Creek Batch Plant | Idaho Springs | — | ◇ UNVERIFIED |
| ESEldorado Stone (prev. Stonecraft) | Pueblo | — | ◇ UNVERIFIED |
| EMEverist Materials - Concrete Batc H Plnt | Kremmling | — | ◇ UNVERIFIED |
| FIFiberon INC | Fort Collins | — | ◇ UNVERIFIED |
| FPFirebaugh Precast, INC. | Colorado Springs | — | ◇ UNVERIFIED |
| FRFront Range Aggregates, LLC | Colorado Springs | — | ◇ UNVERIFIED |
| FRFront Range Reddi Mix - 651 S Cr 9e | Loveland Area | — | ◇ UNVERIFIED |
| GCGolden Concrete Lllp (sec Screen) | Longmont Area | — | ◇ UNVERIFIED |
| GSGosney & Sons INC | Bayfield | — | ▲ REPORTED CLOSED |
| GEGreeley Excavation | Greeley | — | ◇ UNVERIFIED |
| HIHagen Industries | Commerce City | — | ◇ UNVERIFIED |
| HEHalliburton Energy Services, INC | Grand Junction Area | — | ◇ UNVERIFIED |
| HHHarso Heckett Multiserv Plant 67 | Pueblo | — | ◇ UNVERIFIED |
| HCHeadwaters - Craig Power Plant Terminal | Craig | — | ◇ UNVERIFIED |
| HCHigh Country Marble | Castle Rock | — | ◇ UNVERIFIED |
| HIHolcim (us) INC - Fort Collins Terminal | Henderson | — | ◇ UNVERIFIED |
| HIHolcim-wcr INC - Denver Plant | Denver | — | ◇ UNVERIFIED |
| HWHolcim Wcr - Pueblo East | Pueblo Area | — | ◇ UNVERIFIED |
| ICIke Concrete | Fairplay | — | ◇ UNVERIFIED |
| IRInland Ready Mix, LLC - Fort Lupton | Fort Lupton | — | ◇ UNVERIFIED |
| JBJohn Balistreri | Denver | — | ◇ UNVERIFIED |
| LWLafarge West INC. | Evergreen | — | ◇ UNVERIFIED |
| LWLafarge West, INC. | Pueblo | — | ◇ UNVERIFIED |
| LWLafarge West, INC. | Longmont | — | ◇ UNVERIFIED |
| LWLafarge West, Inc.- Drennan Concrete Pla | Colorado Springs | — | ◇ UNVERIFIED |
