Martin Marietta Castle Rock Ready Mix
309 South Gilbert Street, Castle Rock, CO 80104
LIKELY ACTIVELAST SEEN IN FEDERAL DATA JAN 2026 · 3 SOURCES
Operating signal within 24 months, or from a single source.
What they make
Ready-Mix Concrete Manufacturing327320Where it is
39.36719, -104.85164 · CENSUS TIGER
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Sunset Stone | Castle Rock | Other Concrete Product Manufacturing 327390 | LIKELY ACTIVE | 2.0 KM |
| Irving F Jensen CO INC | Castle Rock | Ready-Mix Concrete Manufacturing 327320 | UNVERIFIED | 1.9 KM |
| Aggregate Industries - Castle Rock Plant | Castle Rock | Ready-Mix Concrete Manufacturing 327320 | UNVERIFIED | 2.1 KM |
| Ready Mixed Concrete CO Plant 6 | Castle Rock | Ready-Mix Concrete Manufacturing 327320 | UNVERIFIED | 4.3 KM |
| Schmidt Const CO INC Mencenberg Quarry | Castle Rock | Asphalt Paving Mixture and Block Manufacturing 324121 | LIKELY ACTIVE | 6.1 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 6 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
EPA cross-references this facility in AIR, AIRS/AFS, EIS, RCRAINFO, TRIS · EPA site type STATIONARY.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| EPA ECHO | OPERATING | JAN 2026 | JAN 2026 |
| EPA TRI | OPERATING | DEC 2023 | DEC 2023 |
| EPA FRS | EXISTENCE | JUN 2016 | JUN 2016 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | EPA FRS | JUL 2026 |
| CITY | EPA FRS | JUL 2026 |
| GEOM | EPA FRS | JUL 2026 |
| NAME | EPA FRS | JUL 2026 |
| RCRA GENERATOR STATUS | EPA ECHO | SEP 2026 |
| STATE | EPA FRS | JUL 2026 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.