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FOURTEENTH CONGRESS OF THE 
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First Regular Session 
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REPUBLIC OF THE PHILIPPINES 
SENATE 
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Senate Bill No.'= 
Introduced by SENATOR COMPAflERA PIA S. CAYETANO 
EXPLANATORY NOTE 
This bill seeks to declare the La Mesa Watershed in the Cities of Quezon and 
Caloocan in the Municipality of Rodriguez, Province of Rizal as a Watershed 
Reservation. 
With a total area 2,700 hectares, the La Mesa Watershed Reservation is the last 
remaining forest of its size in Metro Manila. Covering 700 hectares of the Watershed 
Reservation is a man-made lake, built to serve as water reservoir. The La Mesa 
Watershed Reservation is the primary source of potable drinking water for 12 M 
residents in the Metro Manila area. Also, the La Mesa Watershed Reservation serves as 
a wildlife sanctuary to many indigenous species of plants, trees, and animals. Thereby, 
the protection of La Mesa Watershed is deemed to be very crucial for the reason that it 
is the last remaining forest in Metro Manila and a critical water reservoir of a majority of 
Metro Manila residents. 
This bill, therefore, seeks to declare the La Mesa Watershed as a Watershed 
Reservation in order to protect it from indiscriminate exploitation and to be able to 
maintain its ecological balance and preserve its source of water supply. 
It is deemed crucial that we act on these now to ensure that our children and the 
succeeding generations will inherit a living earth with all of its bountiful natural resources 
and vibrant wildlife. 
In view of the foregoing, the passage of this measure is earnestly urged 
ERA PIA S. CAYETANO 


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FOURTEENTH CONGRESS OF THE 
First Regular Session 
REPUBLIC OF THE PHILIPPINES 
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SENATE 
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Senate Bill NO. .~Z..JJL 
Introduced by Senator Pia S. Cayetano 
AN ACT 
ESTABLISHING THE LA MESA WATERSHED IN THE CITIES OF QUEZON AND 
CALOOCAN AND IN THE MUNICIPALITY OF RODRIGUEZ, PROVINCE OF RIZAL 
AS A WATERSHED RESERVATION AND FOR OTHER PURPOSES 
Be it enacted by the Senate and House of Representatives of the Philippines in Congress assembled: 
SECTION.l. Title. - This Act shall be known as the "La Mesa Watershed 
Reservation Act of 2007." 
SEC.2. Land Classification. - All lands comprising the La Mesa Watershed 
Reservation shall fall under the classification of Watershed Reservation as provided for 
in the Philippine Constitution. 
SEC.3. Scope and Coverage. The La Mesa Watershed Reservation is hereby 
declared into one Watershed Reservation covering parcels of land situated in the Cities 
of Quezon and Caloocan and in the Municipality of Rodriguez, Province of Rizal, more 
particularly described as follows: 
Beginning at a point marked "1" on the map which is adjacent to the Eastern 
Side of North Fairview Subdivision, and identical to corner "1" of Relocation Plan for 
Metropolitan Waterworks i3 Sewerage System (MWSS) Rel-I 3-000074, 
being S 
27'31' W, 1,169.76 M. from MMA-38 (W-I) NAMRIA PRS 92 
with coordinates 
1628282.671 Northing and 507645.087Easting to corner 1 ; 
thence 
N 00'11'W 
496.75 M. 
to corner 2; 
thence 
S 89'3O'E 
176.08 M. 
to corner 3; 
thence 
N 06'48'W 
494.99 M. 
to corner 4; 
thence 
N 02'02'E 
508.01 M. 
to corner 5; 
thence 
N 56'16' E 
373.68 M. 
to corner 6; 
thence 
N 04'53'W 
178.60 M. 
to corner 7; 
thence 
N 03'16'W 
237.74 M. 
to corner 8; 
thence 
N 00'14'E 
210.33 M. 
to corner 9; 
thence 
N 34'37'W 
11 5.98 M. 
to corner 10; 
thence 
N 02'11' E 
132.71 M. 
to corner 11; 


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thence 
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thence 
N 5I020'E 
N 53'53'E 
DUE EAST 
N 45'48' E 
N 82'18' E 
N 74'03'E 
S 69O22' E 
N 30'38'W 
N 36O47'E 
N 3I038'E 
N 56'19' E 
N 59O52'E 
N 54O15' E 
N 75'32'E 
N 69'27' E 
N 73'51'E 
N 71'50' E 
N 76'26'E 
N 50'26' E 
N 29'56'E 
N 34O60'E 
N 10O29' E 
N 03O54'E 
N 02'59'E 
N 08'02'E 
N 09O44' E 
N 28O18' E 
N 29'45' E 
N 33'07'E 
N 30O39' E 
N 53O08'E 
N 38O40'E 
N 83O53'E 
N 73O30' E 
N 75O26' E 
N 67'07'E 
N 57O30'E 
N 46'08'E 
37.86 M. 
166.25 M. 
28.72 M. 
42.41 M. 
63.07 M. 
196.78 M. 
69.50 M. 
175.72 M. 
117.07 M. 
149.65 M. 
17.61 M. 
17.51 M. 
15.04 M. 
15.63 M. 
12.52 M. 
38.64 M. 
65.79 M. 
14.57 M. 
14.57 M. 
18.60 M. 
17.88 M. 
13.41 M. 
21.54 M. 
187.29 M. 
41.92 M. 
17.34 M. 
14.42 M. 
15.75 M. 
13.41 M. 
15.33 M. 
12.21 M. 
15.63 M. 
13.75 M. 
13.75 M. 
139.77 M. 
47.71 M. 
181.81 M. 
138.84 M. 
to corner 12; 
to corner 13; 
to corner 14; 
to corner 15; 
to corner 16; 
to corner 17; 
to corner 18; 
to corner 19; 
to corner 20; 
to corner 21; 
to corner 22; 
to corner 23; 
to corner 24; 
to corner 25; 
to corner 26; 
to corner 27; 
to corner 28; 
to corner 29; 
to corner 30; 
to corner 31 ; 
to corner 32; 
to corner 33; 
to corner 34; 
to corner 35; 
to corner 36; 
to corner 37; 
to corner 38; 
to corner 39; 
to corner 40; 
to corner 41 
to corner 42; 
to corner 43; 
to corner 44; 
to corner 45; 
to corner 46; 
to corner 47; 
to corner 48; 
to corner 49; 


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thence 
thence 
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thence 
thence 
N 07O23' W 
N 34O54'E 
N 52O15' E 
N 04'09'E 
N 14'09'E 
N 17O40' E 
S 70O01' E 
N 85'36'E 
S 89OOI'E 
N 63O07'E 
S 70'43' E 
N 65O09'E 
N 46O02'E 
N 86O10' E 
N 66O38'E 
S 78O59' E 
N 74'59'E 
N OOO36' W 
N 82O08'E 
S 47O32'E 
N 72O02'E 
N 77O32'E 
N 14O28' E 
N 20°50' E 
N 44O52'E 
N 40'57' E 
N 27OOO'E 
N 16O21'E 
N 73'21'E 
N 41OIO'E 
N 60°44'E 
S 8I034'E 
S 75O03'E 
S 38O14'E 
N 32O48' E 
N 33O18' E 
S 76O14' E 
N 72O09'E 
53.18 M. 
191.15 M. 
158.73 M. 
528.38 M. 
209.64 M. 
144.79 M. 
57.16 M. 
7.96 M. 
249.1 0 M. 
95.82 M. 
144.21 M. 
236.79 M. 
334.15 M. 
127.87 M. 
254.01 M. 
70.27 M. 
77.74 M. 
292.42 M. 
231.71 M. 
470.09 M. 
259.26 M. 
247.03 M. 
73.29 M. 
109.40 M. 
219.60 M. 
259.64 M. 
228.64 M. 
205.96 M. 
418.13 M. 
299.04 M. 
145.19 M. 
83.31 M. 
174.54 M . 
146.70 M. 
229.65 M 
125.08 M. 
115.48 M. 
214.04 M. 
to corner 50; 
to corner 51; 
to corner 52; 
to corner 53; 
to corner 54; 
to corner 55; 
to corner 56; 
to corner 57; 
to corner 58; 
to corner 59; 
to corner 60; 
to corner 61 ; 
to corner 62; 
to corner 63; 
to corner 64; 
to corner 65; 
to corner 66; 
to corner 67; 
to corner 68; 
to corner 69; 
to corner 70; 
to corner 71 ; 
to corner 72; 
to corner 73; 
to corner 74; 
to corner 75; 
to corner 76; 
to corner 77; 
to corner 78; 
to corner 79; 
to corner 80; 
to corner 81; 
to corner 82; 
to corner 83; 
to corner 84; 
to corner 85; 
to corner 86; 
to corner 87; 


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thence 
thence 
thence 
thence 
thence 
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thence 
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thence 
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thence 
thence 
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thence 
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thence 
thence 
thence 
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thence 
thencse 
thence 
thence 
thence 
thence 
thence 
S 76'38' E 
S 45'25' E 
S 81'39'E 
N 32'00' E 
N 83'59' E 
S 01'25'W 
S 68'17'E 
S 45'00'W 
S 08'00'W 
S 63'26'W 
S 76'06'W 
N 82'12' W 
S 39OO4'W 
S 00'28' E 
N 66'42'W 
S 46'23'W 
S 27'27'E 
S 33'18' W 
S 60'08'W 
S 19'06' E 
S 62'30'E 
S 03'02'W 
S 49'54'E 
S 31'09'W 
S 41'23'E 
S 50'12' W 
N 78'14'W 
S 05"41'W 
S 86'45'W 
S 19'48' W 
S 30'04'E 
S 27'04'W 
S 04'54'E 
S 19'04' W 
S 47'06'W 
S 50'45'W 
S 16'03' E 
thence 
S 37'51' W 
4 
79.21 M. 
145.68 M. 
110.29 M. 
165.57 M. 
167.27 M. 
93.12 M. 
105.14 M. 
212.59 M. 
251.97 M. 
11.94 M. 
231.89 M. 
129.39 M. 
219.16 M. 
93.10 M. 
59.82 M. 
89.59 M. 
66.21 M. 
284.86 M. 
231.41 M. 
83.98 M. 
84.30 M. 
187.21 M. 
94.77 M. 
205.06 M. 
60.01 M. 
214.55 M. 
74.83 M. 
223.15 M. 
188.01 M. 
81.10 M. 
83.76 M. 
115.69 M. 
214.44 M. 
198.60 M. 
293.72 M. 
69.96 M. 
215.18 M. 
169.12 M. 
to corner 88; 
to corner 89; 
to corner 90; 
to corner 91; 
to corner 92; 
to corner 93; 
to corner 94; 
to corner 95; 
to corner 96; 
to corner 97; 
to corner 98; 
to corner 99; 
to corner 100; 
to corner 101 ; 
to corner 102; 
to corner 103; 
to corner 104; 
to corner 105; 
to corner 106; 
to corner 107; 
to corner 108; 
to corner 109; 
to corner 110; 
to corner 1 11; 
to corner 112; 
to corner 11 3; 
to corner 114; 
to corner 115; 
to corner 116; 
to corner 117; 
to corner 11 8; 
to corner 119; 
to corner 120; 
to corner 121; 
to corner 122; 
to corner 123; 
to corner 124; 
to corner 125; 


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thence 
thence 
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thence 
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thence 
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thence 
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thence 
thence 
thence 
thence 
thence 
thence 
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thence 
thence 
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thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
S 19O17'E 
S 22O28'W 
S 09O3O'W 
S 17O49' E 
N 58O57' E 
N 70°24'E 
S 60°06'E 
S 26O34'W 
S 06'09'E 
N 86O36'W 
S 56O36'W 
S 20°45' W 
S 74O38'W 
S 19O37' W 
S OOOI6'E 
S 21O37'W 
S 72'01' W 
S 62O41'W 
S 14O02' W 
S OOO39'E 
S 53'45'E 
S 53O58'E 
S 2Oo40'W 
S 51O31'W 
S 79OO8'W 
N 87O26'W 
N 58'50'W 
N 65'44'W 
N 82OO5'W 
S 59'56'W 
S 36'27'W 
N 82O04'W 
S 65O28-W 
S 09O5O'W 
S 57'41'E 
S 1Oo16'W 
S 49OO7'W 
S 47OO2'W 
261.11 M. 
157.72 M. 
240.60 M. 
154.68 M. 
87.28 M. 
47.79 M. 
416.34 M. 
203.04 M. 
184.96 M. 
90.20 M. 
212.06 M. 
77.52 M. 
72.01 M. 
93.16 M. 
160.24 M. 
348.00 M. 
247.10 M. 
234.46 M. 
195.06 M. 
133.54 M. 
42.58 M. 
41.51 M. 
99.49 M. 
38.01 M. 
137.53 M. 
153.53 M. 
306.74 M. 
85.38 M. 
199.53 M. 
249.39 M. 
258.31 M. 
127.12 M. 
77.17 M. 
75.90 M. 
169.37 M. 
156.00 M. 
89.08 M. 
320.71 M. 
to corner 126; 
to corner 127; 
to corner 128; 
to corner 129; 
to corner 130; 
to corner 131 ; 
to corner 132; 
to corner 133; 
to corner 134; 
to corner 135; 
to corner 136; 
to corner 137; 
to corner 138; 
to corner 139; 
to corner 140; 
to corner 141 .; 
to corner 142; 
to corner 143; 
to corner 144; 
to corner 145; 
to corner 146; 
to corner 147; 
to corner 148; 
to corner 149; 
to corner 150; 
to corner 151; 
to corner 152; 
to corner 153; 
to corner 154; 
to corner 155; 
to corner 156; 
to corner 157; 
to corner 158; 
to corner 159; 
to corner 160; 
to corner 161; 
to corner 162; 
to corner 163; 


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thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
thence 
S 85O12'W 
S 26'27'W 
N 76O38'W 
N 48O43'W 
N 88'17'W 
S 04O33'E 
S 8Oo41'W 
S 7d04'W 
S 71O28'W 
N 86O2O'W 
N 6Oo36'W 
S 78O46'W 
N 74O52'W 
S 65O18' W 
N 89O45'W 
N 0I001'E 
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250.90 M. 
181.07 M. 
118.55 M. 
140.59 M. 
321.95 M. 
213.60 M. 
54.76 M. 
110.52 M. 
669.84 M. 
177.39 M. 
196.68 M. 
451.69 M. 
203.00 M. 
255.12 M. 
470.19 M. 
398.44 M. 
to corner 164; 
to corner 165; 
to corner 166; 
to corner 167; 
to corner 168; 
to corner 169; 
to corner 170; 
to corner 171 ; 
to corner 172; 
to corner 173; 
to corner 174; 
to corner 175; 
to corner 176; 
to corner 177; 
to corner 178; 
to point of beginning, 
containing an area of TWO THOUSAND SIX HUNDRED FIFTY NINE (2,659) 
HECTARES more or less. 
The technical descriptions provided in this Act will be subject to actual ground 
survey and verification to be conducted by the DENR within ninety (90) days after the 
effectivity of this Act. Any modification of the coverage of this Act due to such factors as 
changing ecological situations, new scientific or archeological findings, or discovery of 
traditional boundaries not previously taken into account shall be made through an act of 
Congress, after consultation with the affected public and concerned government 
agencies. 
SEC.4. Management of La Mesa Watershed Reservation.- The La Mesa 
Watershed Reservation shall be under the joint administrative jurisdiction, supervision 
and control of the Department of Natural Resources (DENR) and Metropolitan 
Waterworks and Sewerage System (MWSS) and shall be managed in accordance with 
sustainable development, without impairing its usefulness as source of water for 
domestic use and other related purposes. 
SEC.5. Multi-Sectoral Watershed Management Council.- The DENR in 
collaboration with the MWSS, shall create a Multi-Sectoral Watershed Management 
Council to act as oversight and policy making body over the watershed in accordance 
with existing laws, rules and regulations. 
The Management Council shall prepare an integrated watershed management 
and development plant to include among others, intensive restoration and rehabilitation, 
water quality monitoring and delineation of buffer zone. 


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SEC.6. Appropriations. - The Secretary of the DENR shall immediately include 
in the Department's program the implementation of this Act, the funding of which shall 
be included in the annual General Appropriations Act. 
SEC.7. Reporting Responsibility. - The Multi-Sectoral Watershed Management 
Council shall submit an annual accomplishment report to the Secretary of the DENR on 
the activities undertaken in the La Mesa Watershed Reservation. 
SEC.8. Construction and Suppletory Application of Existing Laws. - The 
provisions of this Act shall be construed liberally in favor of achieving environmental 
protection and sustainable development. Provisions of Presidential Decree 1067, 
otherwise known as the Water Code of the Philippines, Presidential Decree 705 
otherwise known as Revised Forestry Code and existing forestry laws, and their 
corresponding rules and regulations not inconsistent hereto shall have the suppletory 
effect in the implementation of this Act. 
SEC.9. Separability Clause. - If, for any reason, any part or section of this Act is 
declared unconstitutional or invalid, such other parts not affected thereby shall remain 
in full force and effect. 
SEC.lO. Repealing Clause. -All laws, decrees, proclamations, rules and 
regulations inconsistent with the provisions of this Act are hereby repealed or modified 
accordingly. 
SEC.ll. Effectivity Clause. This Act shall take effect fifteen (15) days after its 
complete publication in the Official Gazette or in a national newspaper of general 
circulation available in the La Mesa Watershed Reservation. 
Approved,