On the evening of October 17,1989, the Loma Prieta earthquake of magnitude of 7.1 occurred with its epicenter off Santa Cruz, located about 90 km south of San Francisco. This report presetns the results of field investigation on damage of port and airport facilities. Damage of the port of Oakland resulted from settlement and liquefaction of uncompacted hydraulic filled land. In the 7th street terminal, these damage caused tilted container cranes. At the port of San Francisco, three piled piers were damaged. These damage were not major ones which cause the instabilities of main structures but minor ones such as settlement and cracking of reclaimed land. At Santa Cruz yacht harbor, sheet pile type bulkhead was damaged.
　At Oakland airport, extensive liquefaction of hydraulic sand filled land caused settlement and cracking of the northernmost 3,000 feet of the 10,000-foot runway. At the San Francisco airport, non-structural damage occurred at the terminal and control tower. There was no run-way damage at San Francisco airport.