Poplar Grinding Co Return to Central California Businesses Directory Poplar Grinding Co Claim Listing Return to Central California Businesses Directory Description Details Address 1820 Thunderbolt Dr City Porterville State California ZIP Code 93257 Phone (559) 781-1282 Listing Category Grinding-Precision & Production (Mfrs) - Listings Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?