1. Martin Marietta Aggregates 2097 310th St, Oskaloosa, IA 52577 Coordinate: 41.20776,-92.66303 Phone: (641) 673-9440
2. G-71 Sand & Gravel 1899 310th St, Oskaloosa, IA 52577 Coordinate: 41.21394,-92.69562 Phone: (641) 672-1700