| EMEverist Materials - Concrete Batc H Plnt | Kremmling | — | ◇ UNVERIFIED |
| FIFiberon INC | Fort Collins | — | ◇ UNVERIFIED |
| FPFirebaugh Precast, INC. | Colorado Springs | — | ◇ UNVERIFIED |
| FPForterra Precast Concepts, INC | Grand Junction | — | ◇ UNVERIFIED |
| FPForterra Precast Concepts, INC. | Henderson | — | ◇ UNVERIFIED |
| FRFrontier Ready Mix | Mead, 0.2 Mi Ne of | — | ◇ UNVERIFIED |
| FRFrontier Ready-mix - Johnstown | Johnstown | — | ◇ UNVERIFIED |
| FRFront Range Aggregates, LLC | Colorado Springs | — | ◇ UNVERIFIED |
| FRFront Range Reddi Mix - 651 S Cr 9e | Loveland Area | — | ◇ UNVERIFIED |
| GCGolden Concrete CO | Superior | — | ◇ UNVERIFIED |
| GCGolden Concrete Lllp (telesmith Cone) | Longmont Area | — | ◇ UNVERIFIED |
| GCGolden Concrete Lllp (vince Hagan Cbp) | Littleton | — | ◇ UNVERIFIED |
| GSGosney & Sons INC | Bayfield | — | ◇ UNVERIFIED |
| GGG-p Gypsum CORP | Florence | — | ◇ UNVERIFIED |
| GEGreeley Excavation | Greeley | — | ◇ UNVERIFIED |
| GBGreen Brothers INC. | Fort Morgan | — | ◇ 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 |
| HIHolcim (us) INC - Fort Collins Terminal | Henderson | — | ◇ UNVERIFIED |
| HWHolcim Wcr - Cs-portable | Colorado Springs | — | ◇ UNVERIFIED |
| HIHolcim-wcr INC - Denver Plant | Denver | — | ◇ UNVERIFIED |
| HWHolcim Wcr - Pueblo East | Pueblo Area | — | ◇ UNVERIFIED |
| HWHolcim Wcr - Pueblo East | Pueblo | — | ◇ UNVERIFIED |
| HRHolyoke Ready Mix | Holyoke | — | ◇ UNVERIFIED |
| ICIke Concrete | Fairplay | — | ◇ UNVERIFIED |
| IRInland Ready Mix, LLC - Fort Lupton | Fort Lupton | — | ◇ UNVERIFIED |
| IFIrving F Jensen CO INC | Castle Rock | — | ◇ UNVERIFIED |
| IFIrving F Jensen CO INC Castle Rock Const | Berthoud | — | ◇ UNVERIFIED |
| JBJohn Balistreri | Denver | — | ◇ UNVERIFIED |
| LWLafarge (was Western Mobile Southern INC | Colorado Springs | — | ◇ UNVERIFIED |
| LWLafarge West INC. | Evergreen | — | ◇ UNVERIFIED |
| LWLafarge West, INC. | Longmont | — | ◇ UNVERIFIED |
| LWLafarge West, INC. | Pueblo | — | ◇ UNVERIFIED |
| LWLafarge West, Inc.- Drennan Concrete Pla | Colorado Springs | — | ◇ UNVERIFIED |
| LWLafarge West, INC. - Howe Pit | Commerce City | — | ◇ UNVERIFIED |
| LWLafarge West, Inc.- Minturn Concrete Plt | Minturn | — | ◇ UNVERIFIED |
| LWLafarge West, INC. - Steamboat North Pit | Steamboat Springs | — | ◇ UNVERIFIED |
| LWLafarge Woody Creek Ready Mix | Woody Creek | — | ◇ UNVERIFIED |
| LCLawson Construction - 22-906 | Loveland | — | ◇ UNVERIFIED |
| LPLindsay Precast LLC - Dacono | Dacono Area | — | ◇ UNVERIFIED |
| LRLoveland Ready Mix Concrete - Green Pit | Johnstown | — | ◇ UNVERIFIED |
| LRLoveland Ready Mix Concrete INC | Johnstown Area | — | ◇ UNVERIFIED |
| LCLtj Concrete, LLC - Weber Business Park | Dove Creek | — | ◇ UNVERIFIED |
| MAM. A. Concrete Const- 32.5 Rd Gravel Pit | Grand Junction Area | — | ◇ UNVERIFIED |
| MMMartin Marietta - Del Camino Ready Mix | Longmont | — | ◇ UNVERIFIED |
| MMMartin Marietta Mat - Port Hmap & Gen | Colorado Springs | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Estes Park | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Littleton | — | ◇ UNVERIFIED |
