I've been wondering for years about this one too. I've always assumed it was a water pipeline. Any authoritative sources on this?<div><br><div>Wayne Manuel<br>
<br><br><div class="gmail_quote">On Fri, Apr 8, 2011 at 10:24 PM, Eugene Alvin Villar <span dir="ltr"><<a href="mailto:seav80@gmail.com">seav80@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
I was editing in Diliman yesterday when I noticed that the linear<br>
boundary between UP Diliman and Loyola Heights and Pansol[1]<br>
apparently went further northeast and southwest than I thought. If you<br>
go northeast you'll notice that the southeast perimeter of Ayala<br>
Heights[2] follows the same line. If you go further northeast, other<br>
residential subdivisions follow the same line[3]. Go further northeast<br>
into Rizal and there's a parallel road that follows the same angle[4],<br>
which in Google Maps is named "Daan Tubo". So this is a pipeline?<br>
<br>
Interestingly, the footway from Katipunan running along UP Diliman is<br>
also called "Daan Tubo"[5]. I don't think it's a coincidence that<br>
these two ways kilometers apart are named the same thing.<br>
<br>
If you go the opposite direction, it seems that the barangay<br>
boundaries between East Kamias and the Quirinos follow the same line<br>
and ends near Cubao[6].<br>
<br>
But, if you switch to satellite imagery, such as in Brgy. E. Rodriguez<br>
in Google[7], you can see the same line via the house lots! You can<br>
follow the same line all the way into San Juan where it disappears[8].<br>
<br>
Is this a real pipeline, possibly abandoned?<br>
<br>
I have 2 theories.<br>
<br>
1) This is an oil pipeline. If you follow the line into Manila, it<br>
goes close to the Pandacan oil depot. But why would it go to Rizal?<br>
<br>
2) This is a water pipeline. The line's end in the northeast is<br>
somewhat close to Wawa Dam and this dam used to supply Metro Manila's<br>
water before the Angat-La Mesa dam system became operational. In<br>
addition, the line passes right next to the MWSS reservior at San<br>
Juan[9]. I have a hunch that this is the correct answer.<br>
<br>
What do you guys think? :-)<br>
<br>
Here's a overview map of this line:<br>
<a href="http://maps.google.com/maps/ms?ie=UTF8&t=k&hl=en&msa=0&msid=213651493644683398187.0004a0688716ea01927e5&ll=14.66929,121.041527&spn=0.163409,0.312424&z=12" target="_blank">http://maps.google.com/maps/ms?ie=UTF8&t=k&hl=en&msa=0&msid=213651493644683398187.0004a0688716ea01927e5&ll=14.66929,121.041527&spn=0.163409,0.312424&z=12</a><br>
<br>
<br>
[1] <a href="http://osm.org/go/4zhTLvxM-?m" target="_blank">http://osm.org/go/4zhTLvxM-?m</a><br>
[2] <a href="http://osm.org/go/4zhTzuAL--?m" target="_blank">http://osm.org/go/4zhTzuAL--?m</a><br>
[3] <a href="http://osm.org/go/4zhT@d1F--?m" target="_blank">http://osm.org/go/4zhT@d1F--?m</a><br>
[4] <a href="http://osm.org/go/4zhcZBkv-?m" target="_blank">http://osm.org/go/4zhcZBkv-?m</a><br>
[5] <a href="http://osm.org/go/4zhTkJ3ti--" target="_blank">http://osm.org/go/4zhTkJ3ti--</a><br>
[6] <a href="http://osm.org/go/4zhSdpfW?m" target="_blank">http://osm.org/go/4zhSdpfW?m</a><br>
[7] <a href="http://maps.google.com/?ie=UTF8&t=k&ll=14.626181,121.052459&spn=0.005108,0.009763&z=17" target="_blank">http://maps.google.com/?ie=UTF8&t=k&ll=14.626181,121.052459&spn=0.005108,0.009763&z=17</a><br>
[8] <a href="http://maps.google.com/?ie=UTF8&t=k&ll=14.609478,121.034564&spn=0.005108,0.009763&z=17" target="_blank">http://maps.google.com/?ie=UTF8&t=k&ll=14.609478,121.034564&spn=0.005108,0.009763&z=17</a><br>
[9] <a href="http://maps.google.com/?ie=UTF8&t=k&ll=14.614253,121.040915&spn=0.005108,0.009763&z=17" target="_blank">http://maps.google.com/?ie=UTF8&t=k&ll=14.614253,121.040915&spn=0.005108,0.009763&z=17</a><br>
<br>
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</blockquote></div><br></div></div>