The La Mesa dam later became part of a larger dam system with the opening of the Ipo Dam in Norzagaray, Bulacan in 1936, the Angat Dam in the same locale in 1967. The three dams formed part of the Angat-Ipo-La Mesa water system.

1. LA MESA
DAM
ADAMSON UNIVERSITY
COLLEGE OF ENGINEERING
CIVIL ENGINEERING DEPARTMENT
CE 428-Water Resources Engineering
Presented to:
Dr. Tomas U. Ganiron Jr.
Presented by:

2. overview
HISTORY OF LA MESA DAM
FEATURES OF LA MESA DAM
PURPOSE OF LA MESA DAM
ISSUES AND CHALLENGES
ADDITIONAL INFORMATION

3. History of
La Mesa Dam
History of
La Mesa Dam

4. LA MESA DAM WAS constructed in 1929 during
the United States administration of the Philippines
Sometime between 1920 and 1926, the Metropolitan
Water District decided to build a replacement for
the old Wawa Dam in Montalban, Rizal
It was built in Novaliches, which was then still
part of the Municipality of Caloocan due to the
sloping topography of the watershed area from
Bulacan.

5. La Mesa Dam turns 90 years old this year, it
becomes the oldest among the three dams
comprising the Angat-Ipo-La Mesa water system.
The La Mesa dam later became part of a larger dam
s y s t e m w i t h t h e o p e n i n g o f t h e I p o
Dam in Norzagaray, Bulacan in 1936, the Angat
Dam in the same locale in 1967. The three dams
formed part of the Angat-Ipo-La Mesa water
system.
The La Mesa Dam was raised in 1959 to increase the
reservoir's maximum capacity to its current level.

6. Features of
La Mesa Dam
Features of
La Mesa Dam

7. EARTH DAM
ELEVATION AT
OVERFLOW IS
80.15 METERS
(263 FT)
RESERVOIR CAPACITY IS
50.5 MILLION CU.M.
(1780 MILLION CU.FT.)
storage capacity
equivalent to 19 days of
Manila Water’s supply
requirements
Its reservoir
occupies an area
of 27 sq. km. (10
sq.mi.)
Critical mark
At 69 meters above
sea level (226 ft)

8. Denr and
mwss
It is treated at
the La Mesa and
Balara Treatment
Plants
The La Mesa facility
has a design capacity
of 2,400 million litters
per day (mld)
the Balara facility has a
capacity of 1,600 mld
ELEVATION AT
CREST IS 82.5
METERS (271 FT)
Water from the reservoir spills
into the Tullahan River which
transports the water to
the Manila Bay

9. Purpose of
La Mesa Dam
Purpose of
La Mesa Dam

10. The Wawa Dam which serves Manila and surrounding
locales had to be replaced due to the growing population
of the Manila area
Serves as a primary sedimentation basin
During dry season, it serves as a buffer or reliability dam
to provide water supply
Water supply for 12 million residents in metro manila

11. Issues and
Challenges of
La Mesa Dam
Issues and
Challenges of
La Mesa Dam

12. while there is still enough supply from the
Angat Dam, the water cannot pass through
Manila Water's facility at La Mesa because
the dam is drying up
Manila Water deployed floating water
pumps

13. Insufficient Water Supply for Metro Manila
due to higher demand than supply and
unexpected water interruptions.
Large amount of rainfall

14. La Mesa Dam's water level falls to the
critical mark of below 68.85 meters as of
September 23, 2019
it is a signal for the MWSS, Maynilad, and
Manila Water to regulate water supply to
their customers.

15. dam's water level reaches its maximum
level of over 80 meters, particularly
during heavy rains and strong storms or
typhoons, the excess water overflows to
t h e d o w n s t r e a m T u l l a h a n R i v e r ,
threatening residents along low-lying
shores of the waterway.
it is a signal for the MWSS, Maynilad, and
Manila Water to regulate water supply to
their customers.

16. If it was El Nino, then all of our water
reservoirs would dry up as well. However,
both Angat Dam and Ipo Dam are at normal
levels. Only La Mesa Dam was experiencing
the critical water level.
Construction of kaliwa dam to avoid
recurrence of water shortage supply. But
it was not pushed through because the
kaliwa dam will destroy 291 hectares of
the sierra madre

17. Additional
Information about
La Mesa Dam
Additional
Information about
La Mesa Dam

18. Rehabilitation of the deteriorated section of Aqueduct No. 5.
Once commissioned, the project will allow more efficient
conveyance of raw water from Angat Dam to the La Mesa Dam
and Balara water treatment plants.
An estimated 394 million liters per day (MLD) of water lost
daily due to leakages will be recovered which can be used to
augment supply for improved water availability and for
expansion areas in Rizal and Cavite Provinces.
The project is a critical component of Metropolitan
Waterworks & Sewerage System's (MWSS) Water Security
Legacy Program (WSLP) that aims to ensure adequate and
uninterrupted water supply for Mega Metro Manila.

19. Project objective
The project is a concrete manifestation of MWSS's
firm commitment to ensure water supply security to
Metro Manila. As such, its primary goal is to
safeguard the integrity of raw water conveyance
from Ipo Dam to the La Mesa portals.

20. beneficiaries
Once completed, the project is expected to serve the needs
of an additional 6 million people. By the first quarter of 2013,
AQ-6 is envisioned to drastically reduce the risk of water
shortage, 50% of its total output being intended for Metro
Manila.
Additional beneficiaries are the people of Caloocan City and
San Jose Del Monte City, Bulacan. The project is expected to
spur development and ensure continuous supply of water in
these areas.

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