Lake Caliraya was created after the construction of Caliraya Dam, an embankment dam started in 1939

1. Q U E E N C E S S A L C A N T A R A • M A I C A B A R R E D O • L E Z T E R B A T A R A O • K A H Y D M O N Z O N • A D D A Z A F E
LAK
ECALIRA
ADAMSON UNIVERSITY
COLLEGE OF ENGINEERING
CIVIL ENGINEERING DEPARTMENT
CE 428-Water Resources Engineering
Presented to:
Dr. Tomas U. Ganiron Jr.
Presented by:
.

2. Content
DESCRIPTION OF
LAKE CALIRAYA
CHARACTERISTICS AND QUALITIES OF
LAKE CALIRAYA
CONSTRUCTION OF
LAKE CALIRAYA
PROBLEMS, ISSUES AND SOLUTIONS OF
LAKE CALIRAYA

5. Description

6. Lake Caliraya
Lake Caliraya is a man-made
lake situated in the municipalities
of Lumban, Cavinti, and
Kalayaan in Laguna
province, Philippines.
Lake Caliraya serves as
the reservoir for the
Kalayaan and Caliraya
Power Plants.
Lake Caliraya has a
geographical
approximation of
1,200 meters above
sea level.
Lake Caliraya was created in
the year 1939 and was
purposely developed
as a site for water
sports.
Lake Caliraya is more
than 100 feet high
wherein a diversion
canal was also created.
Lake Caliraya was allegedly
found out that there are
unknown spirits in and
around the lake based
from the spine-tingling
chronicles of the ancient
natives of Caliraya.

7. Parts of Lake Caliraya

8. Characteristics
Qualitiesand

9. Characteristics
LOCATION
Laguna and
Quezon,Luzon
Island
TYPE
Artificial
MAX. LENGTH
8 km (5.0 mi)
MAX. WIDTH
3 km (1.9 mi)
SURFACE
AREA
1,050 ha
(2,600
acres)
SHORE
LENGTH
157 km
(98 mi)
SURFACE
ELEVATION
300 m
(980 ft)
IMPOUNDS
Caliraya
River
TYPE OF
IMPOUNDING
RESERVOIR
Storage or Conse
rvation Reservoir

10. Lake Caliraya's bottom, as well as the
surrounding hills, are characterized by a
reddish clay topsoil. The lake's floor has
a very soft clay bottom.
Lake Caliraya is situated approximately
1,200 feet above sea level, and is
perched high in the Sierra Madre.
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11. Lake Caliraya was later connected with anoth
er man-made lake, Lumot Lake, to provide m
ore water through a 2.3 km (1.4 mi) undergr
ound penstock.
The dam and lake were used as the uppe
r reservoir for the Kalayaan Pumped-Stor
age Hydroelectric Plant located west of L
ake Caliraya, with Laguna de Bay as the l
ower reservoir.
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12. Construction

13. Lake Caliraya was created after the
construction of Caliraya Dam, an
embankment dam started in 1939
by US Army Corps of Engineers Chief in
the Philippines, Lieutenant Colonel
(later Major General) Hugh J. Casey,
with the approval of Philippine
Commonwealth President Manuel L. Quezon.

14. Caliraya Dam
Caliraya Dam is an embank
ment dam located in the to
wn of Lumban province of L
aguna, in the Sierra Madre
Mountain Range of the Phili
ppines.
An embankment dam over 100 feet (30 m) hig
h, was constructed across the Caliraya River
at its outlet from a large flat plateau area pro
viding a large water reservoir for generating
hydroelectric power for Southern Luzon from
the Caliraya hydroelectric plant.
The reservoir (Lake Caliraya) created b
y the dam, initially supplied one of the
oldest hydroelectric plants in the Phili
ppines, and later became a popular rec
reational area for numerous water spo
rts and fishing.
The dam's construction was
started in 1939 under the s
upervision of the engineeri
ng firm Pedro Siochi and Co
mpany and a small hydroele
ctric plant was operated in
1942.

15. The CALIRAYA DAM is a rolled -earth d
am with crest elevation at 292 masl an
d has a base width of 161.7 m and a to
p width of 10 m.
The base of the dam at the foundation ele
vation is at approximately 270 masl and w
as constructed on a foundation of alternat
e layers of basalt rock and soft materials. The total length consider
ing the west and east dik
e is 1,156 m.
The upstream face is protected w
ith slabs of cement while downst
ream face is covered with grass.

16. Levels

17. Surge tank is a water storage device used as pressure
neutralizer in hydropower water conveyance system to
resists excess pressure rise and pressure drop conditions.
Penstock is a sluice or gate or intake
structure that controls water flow, or an
enclosed pipe that delivers water to
hydro turbines and sewerage systems.
Turbine is a rotary mechanical
device that extracts energy
from a fluid flow and converts
it into useful work.
Draft tube is a kind of tube which connects (or acts as an
intermediately) between the water turbine exit and tail race.
Tail race,
containing tail
water, is a
channel that
carries water
away from a
hydroelectric
plant or water
wheel.

18. INTAKE STRUCTURE
located on the left bank of the reservoir
at El.272.5 m.
From the intake until the surge tank; wa
ter is conveyed through a circular, reinf
orced concrete, 2.5 m diameter conduit.
COMPONENTS OF CALIRAYA HYDR
OELECTRIC POWERPLANT ( CHEPP)

19. SURGE TANK
6.1mdiameter and raises 32.9-m above t
he foundation (of the Johnson differenti
al type)
There is a 2.3m diameter maintenance b
utterfly valve immediately downstream
of the surge tank.
COMPONENTS OF CALIRAYA HYDR
OELECTRIC POWERPLANT ( CHEPP)

20. PENSTOCK
A 741 m x 2.0 to 2.3 m diameter convey
s the water to the powerhouse
-supported on concrete saddles and anc
hor blocks.
(A manifold diverts water into two branc
hes and feeds each of the units.
COMPONENTS OF CALIRAYA HYDR
OELECTRIC POWERPLANT ( CHEPP)

21. POWERHOUSE
contains two Francis vertical turbines a
nd synchronous generator with a total
guaranteed capacity of 22.6 M
COMPONENTS OF CALIRAYA HYDR
OELECTRIC POWERPLANT ( CHEPP)

22. GENERATORS
are connected to the main and transfer bus
es in the substation through SF6 gas-type ci
rcuit breakers rated 1,250A. Two transform
ers 13,800/480V feed the plant auxiliaries.
COMPONENTS OF CALIRAYA HYDR
OELECTRIC POWERPLANT ( CHEPP)

23. SWITCHYARD
There are two feeders connecting Kala
yaan and Botocan 115 KV line, each on
e equipped with a de-ton grid circuit br
eaker. These feeders supply power thr
ough two 3-phase power transformers
each rated at 22,000 kVA, 13.2 KV / 11
5KV
COMPONENTS OF CALIRAYA HYDR
OELECTRIC POWERPLANT ( CHEPP)

24. Problems
Issues/
and
Solutions

25. Lake Caliraya's surroundings
were occupied by the local
squatters and bandits posing as
NPA New People's Army, which
affected tourism and
development.
There has been major
real estate developed
with the construction
of several small resort
s and Caliraya Springs,
a golf course and
country club.

26. Despite the proliferation of squatters on the
roadside due to the negligence of government
agencies such as the DPWH (Dept of Public
Works and Highways) and Napocor (National
Power Corporation), Caliraya continues to be a
haven for the rich and the elite, with activities
including largemouth bass fishing, wind
surfing, kite boarding, wake boarding, jet
skiing, water skiing, boating, golf, camping,
and other sporting and recreational outdoor
activities.
Property values remain
high, and a new
generation of develop
ments, both private
and commercial, are
slowly coming
onstream.