| Business | Phone |
| Nucast Industries Inc 23220 Park Canyon Dr, Corona 92883 | (951) 277-8888 |
| Rinker Materials Hydro Conduit 23200 Temescal Canyon Rd, Corona 92883 | (951) 277-2420 |
| True-Cast Concrete Products 3940 Temescal Canyon Rd, Corona 92883 | (951) 277-3155 |