The San Pedro Breakwater was started in 1899 and over time was expanded to protect the current site of the Port of Long Beach. The Port of Long Beach was founded on of mudflats on June 24, 1911, at the mouth of the Los Angeles River. In 1917, the first Board of Harbor Commissioners was formed to supervise harbor operations. Due to the booming economy, Long Beach voters approved a $5 million bond to improve the inner and outer harbor in 1924.