[talk-ph] Geo mystery: What is this weird northeast line running from San Juan to Montalban?

[Wayne Manuel]

I've been wondering for years about this one too. I've always assumed it was
a water pipeline. Any authoritative sources on this?

Wayne Manuel


On Fri, Apr 8, 2011 at 10:24 PM, Eugene Alvin Villar <seav80 at gmail.com>wrote:

> I was editing in Diliman yesterday when I noticed that the linear
> boundary between UP Diliman and Loyola Heights and Pansol[1]
> apparently went further northeast and southwest than I thought. If you
> go northeast you'll notice that the southeast perimeter of Ayala
> Heights[2] follows the same line. If you go further northeast, other
> residential subdivisions follow the same line[3]. Go further northeast
> into Rizal and there's a parallel road that follows the same angle[4],
> which in Google Maps is named "Daan Tubo". So this is a pipeline?
>
> Interestingly, the footway from Katipunan running along UP Diliman is
> also called "Daan Tubo"[5]. I don't think it's a coincidence that
> these two ways kilometers apart are named the same thing.
>
> If you go the opposite direction, it seems that the barangay
> boundaries between East Kamias and the Quirinos follow the same line
> and ends near Cubao[6].
>
> But, if you switch to satellite imagery, such as in Brgy. E. Rodriguez
> in Google[7], you can see the same line via the house lots! You can
> follow the same line all the way into San Juan where it disappears[8].
>
> Is this a real pipeline, possibly abandoned?
>
> I have 2 theories.
>
> 1) This is an oil pipeline. If you follow the line into Manila, it
> goes close to the Pandacan oil depot. But why would it go to Rizal?
>
> 2) This is a water pipeline. The line's end in the northeast is
> somewhat close to Wawa Dam and this dam used to supply Metro Manila's
> water before the Angat-La Mesa dam system became operational. In
> addition, the line passes right next to the MWSS reservior at San
> Juan[9]. I have a hunch that this is the correct answer.
>
> What do you guys think? :-)
>
> Here's a overview map of this line:
>
> 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
>
>
> [1] http://osm.org/go/4zhTLvxM-?m
> [2] http://osm.org/go/4zhTzuAL--?m
> [3] http://osm.org/go/4zhT@d1F--?m
> [4] http://osm.org/go/4zhcZBkv-?m
> [5] http://osm.org/go/4zhTkJ3ti--
> [6] http://osm.org/go/4zhSdpfW?m
> [7]
> http://maps.google.com/?ie=UTF8&t=k&ll=14.626181,121.052459&spn=0.005108,0.009763&z=17
> [8]
> http://maps.google.com/?ie=UTF8&t=k&ll=14.609478,121.034564&spn=0.005108,0.009763&z=17
> [9]
> http://maps.google.com/?ie=UTF8&t=k&ll=14.614253,121.040915&spn=0.005108,0.009763&z=17
>
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