Nelson & Rock Contracting Inc Address: 23565 Highway K45, Onawa, IA 51040 Phone: (712) 423-1065 Home Renovation, Excavating Contractors Other Businesses: Minnihan Law Firm at 906 9th St, Onawa, IA 51040 Jensen, Michael P at 710 Iowa Ave, Onawa, IA 51040 Farm Service Agency at 211 Iowa Ave, Onawa, IA 51040