The La Mesa Dam is an earth dam whose reservoir can hold up to 50.5 million cubic meters and occupying an area of 27 square kilometers in Quezon City, Philippines. It was built in 1929 under the supervision of the construction firm Pedro Siochi and Company. It is part of the Angat-Ipo-La Mesa water system, which supplies most of the water supply of Metro Manila.
The water collected in the reservoir is treated on-site by the Maynilad Water Services, and at the Balara Treatment Plant further south by the Manila Water. Both water companies are private concessionaires awarded by the Metropolitan Waterworks and Sewerage System, the government agency in charge of water supply. It is a vital link to the water requirements of 12 million residents of Metro Manila considering that 1.5 million liters of water pass through this reservoir every day. It is located in the La Mesa Watershed Reservation, the last forest of its size in the metropolis.
Metro Manila and its surrounding areas are divided into two water concessionaires: Maynilad Water (red) and Manila Water (blue).
Cerro La Mesa or La Mesa is a mountain in the Cordillera de la Ramada range of the Andes, in Argentina. It has a height of 6,200 metres (20,341ft). La Mesa means table in Spanish. The name of the mountain comes its flat and long summit ridge (there are six summits, the 6200m being the highest). Despite the dry climate of the area, there are significant glaciers flowing down the southern and the eastean flank of the mountain.
La Mesa was climbed the first time in 1934 by a Polish expedition consisting of J. Narkienwicz-Jodko, J. Dorawsky, S. Daszynski, A. Karpinski, S. Osiecki and V. Ostrowski. It is unclear if they effectively reached the highest point of the mountain.