| AIAggregate Industries - Wcr, INC. | Centennial | — | ◐ LIKELY ACTIVE |
| BCBestway Concrete CO Titan Plant | Littleton | — | ◐ LIKELY ACTIVE |
| FPFoley Products Company - Littleton | Littleton | 20–99 | ◐ LIKELY ACTIVE |
| MMMartin Marietta Castle Rock Ready Mix | Castle Rock | — | ◐ LIKELY ACTIVE |
| OPOldcastle Precast INC | Littleton | — | ◐ LIKELY ACTIVE |
| MMMartin Marietta Titan Ready Mix | Littleton | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries - Castle Rock Plant | Castle Rock | — | ◇ UNVERIFIED |
| BBBoral Best Block North Plant | Littleton | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Riverview Ready Mix Plant | Littleton | — | ◐ LIKELY ACTIVE |
| SSSunset Stone | Castle Rock | 20–99 | ◐ LIKELY ACTIVE |
| AIAggregate Industries - Wcr INC | Franktown | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Sedalia | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Franktown Ready Mix Plant | Franktown | — | ◇ UNVERIFIED |
| ECE & C Precast Concrete, INC. | Littleton | — | ◇ UNVERIFIED |
| IFIrving F Jensen CO INC | Castle Rock | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Littleton | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO Plant 6 | Castle Rock | — | ◇ UNVERIFIED |
| RMRinker Materials | Littleton | — | ◇ UNVERIFIED |
| BTBurnco - Titan CO | Littleton | 1–19 | ◐ LIKELY ACTIVE |
| CEColorado Englewood Inverness Parkway | Englewood | 1–19 | ◐ LIKELY ACTIVE |
| DBDENB Best Block | Littleton | 20–99 | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company Sedalia | Sedalia | 1–19 | ◐ LIKELY ACTIVE |
| ABAcme Brick Company | Castle Rock | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Elizabeth, 2.8 Mi W of | — | ◇ UNVERIFIED |
| BABuild America | Sedalia | — | ◇ UNVERIFIED |
| CCCarder Concrete Products CO | Littleton | — | ◇ UNVERIFIED |
| HCHigh Country Marble | Castle Rock | — | ◇ UNVERIFIED |
| LWLafarge West, INC. | Littleton Area | — | ◇ UNVERIFIED |
| OWOldcastle Westile, INC. | Littleton | — | ◇ UNVERIFIED |
| PCPlum Creek Precast Company | Littleton | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO - Plant 13 | Louviers | — | ◇ UNVERIFIED |
| TCThe Concrete Company, LLC | Parker | — | ◇ UNVERIFIED |
| TBTriple B Concrete | Sedalia | — | ◇ UNVERIFIED |
