In the 1880s, Big Valley saw a major increase in population, thus more schools were needed. It did not take much to create a school district then. The residents needed to be more than five miles from the nearest school house and have ten school age children in a proposed district. The Pine Grove School was established in February 1888, from sections of the Cedar Run and Pioneer School Districts. On March 17, 1888, an election was held at the residence of J.M. Bassett to approve both a bond measure for $500 and a site for a new school. The voters, all eight, approved the bond measure, though the records do not indicate anything about the school site proposal. On August 3, 1925, the Board of Supervisors approved Pine Grove’s petition to consolidate with Bieber. The residents requested that the abandoned school not be sold, torn down or removed from its site. What became of it, I do not know.