query: When was the Naval Base Subic Bay built?
passage: U.S. Naval Base Subic Bay
On 8 March 1885, the Spanish Navy authorized construction of the Arsenal de Olongapo and by the following September, work started at Olongapo. Both the harbor and its inner basin were dredged and a drainage canal was built, as the Spanish military authorities were planning to make Olongapo and their navy yard an "island." This canal also served as a line of defense and over which the bridge at the base's Main Gate passes. When the Arsenal was finished, the gunboats Caviteño, Santa Ana, and San Quintín were assigned for its defense. To complement these gunboats, coastal artilleries were planned for the east and west ends of the station, as well as on Grande Island.
passage: U.S. Naval Base Subic Bay
From 1988 to 1992, the US Government and Philippine government tried to renegotiate the terms of an extension of the military bases at Subic and Clark. This referred to the Military Bases Agreement of 1947, which was due to expire. Intense negotiations between the governments of the United States and the Philippines began. These negotiations resulted in the Treaty of Friendship, Peace and Cooperation between the United States and the Republic of the Philippines.[14] This would have extended the lease of the American bases in the Philippines. However, a bone of contention remained the amount of money that the US Government would pay to the Philippine government for the lease and use of the bases.[15]