| MMMartin Marietta Mtrls - Quivas | Denver | — | ◐ LIKELY ACTIVE |
| MMMartin Marietta Titan Ready Mix | Littleton | — | ◐ LIKELY ACTIVE |
| MLMonierlifetile L.l.c. | Henderson | — | ◐ LIKELY ACTIVE |
| SPSummit Pressed Brick - Brick Mfg Plt | Pueblo | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries - Castle Rock Plant | Castle Rock | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Drake Ready Mix Plant | Fort Collins | — | ◇ UNVERIFIED |
| AEArcosa Esc Boulder | Boulder | — | ◇ UNVERIFIED |
| BBBest Block - South Plant | Pueblo | — | ◇ UNVERIFIED |
| BBBoral Best Block North Plant | Littleton | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix - South Ready Mix | Englewood | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Bernhardt Batch Plant | Milliken | — | ◇ UNVERIFIED |
| EGEagle Gypsum Mine | Gypsum | — | ◇ UNVERIFIED |
| HWHolcim Wcr - Cs-north | Colorado Springs | — | ◇ UNVERIFIED |
| HIHolcim-wcr INC - Bannock | Denver | — | ◇ UNVERIFIED |
| HIHolcim-wcr INC - Broomfield Plant | Broomfield | — | ◇ UNVERIFIED |
| HIHolcim-wcr INC - Commerce City Readymix | Commerce City | — | ◇ UNVERIFIED |
| HIHolcim-wcr INC - Sand Cree | Aurora | — | ◇ UNVERIFIED |
| MMMartin Marietta - 2401 Picadilly Rd | Aurora | — | ◇ UNVERIFIED |
| MMMartin Marietta Chambers Ready Mix | Aurora | — | ◇ UNVERIFIED |
| PSPeak Silverthorne Batch Plant | Silverthorne | — | ◇ UNVERIFIED |
| ARAction Ready Mix - Delta Plant | Colorado Springs | — | ◐ LIKELY ACTIVE |
| TBThe Business Strategy LLC | Westminster | — | ◐ LIKELY ACTIVE |
Vasquez Ready Mix LLC - Ross Bandit | Denver | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Riverview Ready Mix Plant | Littleton | — | ◐ LIKELY ACTIVE |
| ARAll Rite Paving & Redi Mix INC | La Junta | — | ◐ LIKELY ACTIVE |
| AGAmerican Gypsum Cogeneration | Gypsum | — | ◐ LIKELY ACTIVE |
| AGAmerican Gypsum Marketing Company | Gypsum | 100–499 | ◐ LIKELY ACTIVE |
| BCBestway Concrete CO | Windsor | — | ◐ LIKELY ACTIVE |
| CMCarlson Memorials | Grand Junction | — | ◐ LIKELY ACTIVE |
| CLColorado Lien CO | Fort Collins | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | Golden | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | Grand Junction | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | Golden | — | ◐ LIKELY ACTIVE |
| CICoorsTek Inc. - Center for Advanced Materials (CCAM) | Golden | 100–499 | ◐ LIKELY ACTIVE |
| CGCrossfire-bonds Gravel Pit | Durango | — | ◐ LIKELY ACTIVE |
| DADenver Arapahoe - Chemical Waste Process Facility - Landfill | Aurora | — | ◐ LIKELY ACTIVE |
| ECEncon Colorado, LLC | Denver | 20–99 | ◐ LIKELY ACTIVE |
| EPErie Pre-cast | Erie | — | ◐ LIKELY ACTIVE |
| FSFlashfill Services LLC - Denver Yard | Commerce City | — | ◐ LIKELY ACTIVE |
| GQGJT Quikrete | Grand Junction | 1–19 | ◐ LIKELY ACTIVE |
| GJGrand Junction Concrete Pipe / Ready Mix | Grand Junction | — | ◐ LIKELY ACTIVE |
| HGHartung Glass Industries Pueblo CO. | Pueblo | 20–99 | ◐ LIKELY ACTIVE |
| KMKast Marble | Colorado Springs | — | ◐ LIKELY ACTIVE |
| OSOldcastle Sw Group - Anderson Rmc | Delta | — | ◐ LIKELY ACTIVE |
| OSOldcastle Sw Group - Rifle Rmc Plant | Rifle | — | ◐ LIKELY ACTIVE |
| OUOldcastle United Comp of Mesa County | Rifle | — | ◐ LIKELY ACTIVE |
| OGOwens-brockway Glass - Windsor #28 | Windsor | — | ◐ LIKELY ACTIVE |
| OIOwens-Illinois, Inc | Windsor | 100–499 | ◐ LIKELY ACTIVE |
| PGPlanet Granite | Colorado Springs | 100–499 | ◐ LIKELY ACTIVE |
| QBQuikrete-concrete Bagging Plant | Denver | — | ◐ LIKELY ACTIVE |