The "Kalagan", called "Caragan" by the Spaniards, occupied the district composed of the two provinces of Surigao, the northern part of Davao Oriental and eastern Misamis Oriental. The two Agusan provinces were later organized under the administrative jurisdiction of Surigao and became the independent Agusan province in 1914. In 1960, Surigao was divided into Norte and Sur, and in June 1967, Agusan followed suit. While Butuan then was just a town of Agusan, the logging boom in the 1950s drew business to the area. On August 2, 1950, by virtue of "Republic Act 523", the City Charter of Butuan was approved.