| RMReady Mixed Concrete CO - Plant 1 | Denver | — | ◐ LIKELY ACTIVE |
| RMRinker Materials - Grand Junction | Grand Junction | — | ◐ LIKELY ACTIVE |
| RIRockwool Industries INC | Pueblo | — | ◐ LIKELY ACTIVE |
| RMRocky Mountain Ready Mix Concrete, Incorporated | Brighton | — | ◐ LIKELY ACTIVE |
| RCRocla Concrete Tie Inc-Pueblo | Pueblo | 20–99 | ◐ LIKELY ACTIVE |
| RBRw Busse Excavating | Grand Lake | — | ◐ LIKELY ACTIVE |
| SMSmith's Materials - Concrete Batch Plant | Dolores 2.3 Mi. Sw of | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Arvada Mix Plant | Arvada Area | — | ◐ LIKELY ACTIVE |
| SPSummit Pressed Brick & Tile CO | Pueblo | 20–99 | ◐ LIKELY ACTIVE |
| SSSunset Stone | Castle Rock | 20–99 | ◐ LIKELY ACTIVE |
| WAWestern Aggregates Incorporated (txi) | Boulder | — | ◐ LIKELY ACTIVE |
| WSWestern Slope Aggregate | Carbondale | — | ◐ LIKELY ACTIVE |
| WRWestlake Royal Roofing - Denver, Co | Henderson | 1–19 | ◐ LIKELY ACTIVE |
| WBWhitewater Building Materials - 940 S 10 | Grand Junction | — | ◐ LIKELY ACTIVE |
| APAll-rite Paving & Redi-mix, INC | Lamar | — | ◐ LIKELY ACTIVE |
| ASAsphalt Specialties Co., INC. Plant #3 | Firestone Area | — | ◐ LIKELY ACTIVE |
| BRBoulder Ready Mix Concrete INC | Boulder | — | ◐ LIKELY ACTIVE |
| CCCastle Concrete Company Snyder Quarry | Colorado Springs | — | ◐ LIKELY ACTIVE |
| CCCompact Ceramics LLC | Penrose | — | ◐ LIKELY ACTIVE |
| CTCoorstek - Table Mountain Center East | Arvada | — | ◐ LIKELY ACTIVE |
| HRHard Rock & Redi Mix INC Main Plant | Salida | — | ◐ LIKELY ACTIVE |
| HIHolcim-wcr INC - Francis | Longmont Area | — | ◐ LIKELY ACTIVE |
| IHInterstate Highway Const- Gen 72-34 | Fountain 3.2 Mi. W of | — | ◐ LIKELY ACTIVE |
| IHInterstate Highway Construction | Denver | — | ◐ LIKELY ACTIVE |
| LPLafarge Powers Ready Mix | Carbondale | — | ◐ LIKELY ACTIVE |
| LRLoveland Ready Mix | Loveland | — | ◐ LIKELY ACTIVE |
| MCMountain Cement CO | Denver | — | ◐ LIKELY ACTIVE |
| MPMountain Park Concrete INC | Granby | — | ◐ LIKELY ACTIVE |
| OSOldcastle Sw Group Dba Telluride Gravel | Telluride | — | ◐ LIKELY ACTIVE |
| OSOldcastle Sw Group INC Dba Four Corners | Pagosa Springs | — | ◐ LIKELY ACTIVE |
| OSOldcastle Sw Group INC Dba United CO of | Paonia | — | ◐ LIKELY ACTIVE |
| RRRitchey's Redi Mix INC | Wray | — | ◐ LIKELY ACTIVE |
| RRR&t Redi Mix - 7355 Colorado 196 | Lamar 3.3 Mi. N of | — | ◐ LIKELY ACTIVE |
| UGUS Gypsum Denver | Denver | — | ◐ LIKELY ACTIVE |
| VLValcrete - Limon Plant | Limon | — | ◐ LIKELY ACTIVE |
| 7W70 W Trucking - Fraser Ready Mix Plant | Fraser | — | ◇ UNVERIFIED |
| ARAbbott Ready Mix INC | Ridgway | — | ◇ UNVERIFIED |
| ACAdvance Concrete Site Mix, LLC | Colorado Springs | — | ◇ UNVERIFIED |
| AIAggregate Industries | Brighton | — | ◇ UNVERIFIED |
| AIAggregate Industries | Windsor | — | ◇ UNVERIFIED |
| AIAggregate Industries, Golden Ready Mix Plant | Golden | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Denver | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Franktown | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Brighton | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Louisville | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Sedalia | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Fort Collins | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC - Brighton Ready Mix | Brighton | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Cs-east Ready Mix Plant | Colorado Springs | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Firestone Ready Mix Plant | Longmont | — | ◇ UNVERIFIED |