O'Brien Rock Co Address: 791 E 590th Ave, Frontenac, KS 66763 Phone: (620) 231-4940 Concrete-Ready Mixed, Ready-Mixed Concrete-Manufacturers Other Businesses: Brunetti Law Office at 214 E Mckay St, Frontenac, KS 66763 Paradise Medical Spa at 1026 N Highway 69, Frontenac, KS 66763