Keys & Bullock opened a new quarry on the south side of Roca in 1875, and later called it the Blue Stone quarry. Rock from these quarries was used in the construction of many buildings in Lincoln, out-state, and beyond. There was active quarrying in the area for over 100 years, both by the county and by private owners. In 1879 the number of students had grown so that another schoolhouse was needed. That one also was quickly outgrown, so a larger wooden building was erected. By 1882 there were 280 students and businesses included a motel, a mill, a hardware store, a lumberyard, and a few other shops. Main Street faced Salt Creek on the West Side of town, with the Railroad depot across the street.