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La Mesa Dam
Metro Manila and its surrounding areas are divided into two water concessionaires.Metro Manila and its surrounding areas are divided into two water concessionaires. 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 Company. Both water companies are private concessionaires awarded by the Metropolitan Waterworks and Sewerage System, the government agency in charge of water supply. Angat DamThe Angat Reservoir and Dam are located at the Angat River in San Lorenzo, Norzagaray, Bulacan. The facilities were constructed from 1964 to 1967 and have been operational since 1968. They have multi-purpose functions:
It has three major tributaries, namely, the Talaguio, Catmon and Matulid Rivers. The Angat Watershed has a moderate to intensive forest cover and has a drainage area of about 568 square kilometers, which receives an average annual rainfall of about 4,200 millimeters. The Angat Dam is a rockfill dam with a spillway equipped with three gates at a spilling level of 219 meters. Its storage capacity is about 850 million cubic meters. Water supply to the MWSS is released through five auxiliary turbines where it is diverted to the two tunnels going to the Ipo Dam. Ipo DamThe Ipo Dam is a gravity concrete dam located about 7.5 kilometers downstream of the Angat Dam near its confluence with the Ipo River in Bulacan. It was completed in January 1984 with a maximum storage capacity of 7.5 million cubic meters, an increase of about 2,500 million liters per day (MLD) from the old Ipo Dam, which used to be located 200 meters upstream of the new dam.
Water from the dam is diverted to the Novaliches Portal and the La Mesa Dam through three intake structures going down to three connecting tunnels into five connecting aqueducts. |
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The
La Mesa Dam is a dam in Quezon City in the Philippines.
It is part of the Angat-Ipo-La Mesa water system, which
supplies most of the water supply of Metro Manila. The
La Mesa Dam is an earth dam whose reservoir can hold up
to 50.5 million cubic meters occupying an area of 27 square
kilometers.
The
principal river, Angat River, originates from the western
flank of the Sierra Madre Mountains. It then cuts through
the mountainous terrain in a westerly direction to the dam
site. The elevation within the watershed rises to a maximum
of 1,115 meters at the Sierra Madre Mountain range and is
lowest at the dam site at 100 meters.
The
spill level of the dam is at an elevation of 101 meters
and it has seven radial floodgates. The watershed topography
is characterized by mountainous terrain similar to the Angat
Reservoir Watershed with moderate forest cover. The watershed
has an area of about 70 square kilometers and receives an
average annual rainfall of 3,500 millimeters. Tributaries
to the Angat River at this section include the Ipo, Sapa
Pako and Sapa Anginon Rivers. These tributaries drain into
the Angat River from the eastern section of the watershed.
