Nonmetallic Mineral Product Manufacturing in Delaware
NAICS 327 · DE
This register lists 29 facilities in Delaware. The Bureau of Labor Statistics counted 38 establishments in Delaware. Rocla Concrete Tie, Inc - Delaware Facility, located in Bear, employed 41 people in 2025.
SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE
Map, cities and product lines
Plants in Delaware12 FACILITIES
Listing 12 of 16: the facilities with a website, a size band or two sources on record. The rest are in site search.
| Facility | City | Employees | Status |
|---|---|---|---|
| Miles Scientific CORP | Newark | 1–19 | ACTIVE |
| Howarth Granite Holdings LLC | Claymont | — | ACTIVE |
| Hma Concrete LLC Dba Heritage Concrete Heald Street Facility | Wilmington | — | LIKELY ACTIVE |
| Prince Minerals LLC | New Castle | — | LIKELY ACTIVE |
| Coherent Ceramics, INC. | Newark | — | LIKELY ACTIVE |
| Hma Concrete LLC Dba Heritage Concrete Middletown Faci;ity | Townsend | — | LIKELY ACTIVE |
| Rinker Middletown Pipe | Middletown | — | LIKELY ACTIVE |
| Best Stone Works of De, LLC | Wilmington | 1–19 | UNVERIFIED |
| Ppg Inds INC Works 32 | Newark | — | UNVERIFIED |
| PHLCP Rinker Materials | Middletown | 20–99 | LIKELY ACTIVE |
| Rath Inc., Newark Facility | Newark | 1–19 | LIKELY ACTIVE |
| Howarth Granite Holdings LLC | Wilmington | 1–19 | UNVERIFIED |
All nonmetallic mineral product manufacturing nationwide · All manufacturing in Delaware