| 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 |
| LCLtj Concrete, LLC - Weber Business Park | Dove Creek | — | ◇ UNVERIFIED |
| MAM. A. Concrete Const- 32.5 Rd Gravel Pit | Grand Junction Area | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Estes Park | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Littleton | — | ◇ UNVERIFIED |
| MMMartin Marietta Rigden Ready Mix | Fort Collins | — | ◇ UNVERIFIED |
| MCMathias Concrete - Alamosa Plant | Alamosa | — | ◇ UNVERIFIED |
| MCMathias Concrete - South Fork | South Fork | — | ◇ UNVERIFIED |
| MCMcatee Construction Co- Riverside | Sterling | — | ◇ UNVERIFIED |
| MWMillstone Weber - Concrete Plant #7001 | Denver | — | ◇ UNVERIFIED |
| MLMisb, LLC | Colorado Springs | — | ◇ UNVERIFIED |
| MDMiyota Development Center of America | Longmont | — | ▲ REPORTED CLOSED |
| MPMountain Park Concrete INC | Granby | — | ◇ UNVERIFIED |
| MSMountain Stone INC | Cortez | — | ◇ UNVERIFIED |
| OCOldcastle - Crested Butte Rmc Plant | Crested Butte Area | — | ◇ UNVERIFIED |
| OCOld Castle Dba United - Two Feathers Pit | Montrose | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - 1771 Shields Dr | Steamboat Springs | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group INC. Dba Four Corners | Cortez | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group- Port Concrete Plant | Gunnison | — | ◇ UNVERIFIED |
| OSOldcastle Sw Grp - Gunnison Redi-mix Pit | Gunnison | — | ◇ UNVERIFIED |
| OPOmega Products International, INC. | Commerce City | — | ◇ UNVERIFIED |
| PRPeak Ready Mix - Steamboat Springs Batch | Steamboat Springs | — | ◇ UNVERIFIED |
| PLPete Lien - Janitell Road Concrete Facil | Colorado Springs | — | ◇ UNVERIFIED |
| PLPete Lien & Sons Dba Trans-colo.concrete | Colorado Springs | — | ◇ UNVERIFIED |
| PPPic Plastics | Denver | — | ◇ UNVERIFIED |
| PNPioneer Natural Res-concrete Batch Plant | Cokedale, 2.4 Mi Sw of | — | ◇ UNVERIFIED |
| PCPrecast Concepts, LLC | Henderson | — | ◇ UNVERIFIED |
| PCPremier Countertops, INC. | Denver | — | ◇ UNVERIFIED |
| PEPueblo East Plant | Pueblo | — | ◇ UNVERIFIED |
| PFP.w. Feenstra - Port. Conc. Batch Plant | Maricopa | — | ◇ UNVERIFIED |
| QMQuikrete- Monarch Mountain, Salida Plnt | Salida, 4.4 Mi Se of | — | ◇ UNVERIFIED |
| RMRaptor Materials - Plant 4 Erie | Erie | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO - Del Camino | Firestone | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO -franklin Plnt 2 | Denver Area | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO Plant 6 | Castle Rock | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete - Nix S&g Mine | Platteville | — | ◇ UNVERIFIED |
| RMRecrete Materials-port. Conc. Plnt | Aurora Area | — | ◇ UNVERIFIED |
| RMRinker Materials Hydro Conduit | Denver | — | ◇ UNVERIFIED |
| RIRm Industrials - Rm Rail Park Recycle Op | Aurora | — | ◇ UNVERIFIED |
| RCRobins Construction - 5101 State Hwy 285 | Antonito Area | — | ◇ UNVERIFIED |
| RIRockustics INC | Aurora | — | ◇ UNVERIFIED |
| RMRocky Mountain Cultured Marble INC | Fort Collins | — | ◇ UNVERIFIED |
| RMRocky Mountain Marble | Peyton | — | ◇ UNVERIFIED |
| RMRocky Mountain Prestress LLC (structural Plant) | Denver | — | ◇ UNVERIFIED |
