“So what about Eastwood Greenview in the shadow of Wawa Dam and La Mesa Dam?”

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hi very informative, our place is in East wood San Rafael, Montalban, It is one of the highlands subdivision. God forbid if the big quake would happen dp you think La Mesa dam and that of Wawa will be dangerous for the area.

an interesting scenario. just would happen should these dams break and what can the catastrophe be like? in my teens, i’ve been up the ramp at the side of the river leading to the top of wawa dam. at a certain point, it was like looking down from the rooftop of a small building to giant white boulders the size of a house on the river below, but at eye level a feet ahead was the top of the dam with the placid water of the river on the other side kissing the brim of the man-made structure. i remember realizing that, if the dam breaks, untold hundreds of thousands of metric tons of water would come cascading into sure destruction and inundation of everything in its path.

i am not prepared to do the math and take into account how far the force of the rampaging waters will bring the destruction to. to do so would be to speculate and trifle with people’s lives, although the possibility of the grim scenario playing out is always there. so the best i can do is to conduct a virtual survey of the area through google earth.

i have posted several images below that show the elevation of the different terrains, and from there one may get a gut feel of the force of the water traveling from wawa dam, how the different turns of the river including land surface features that may possibly break and slow down the river flow. i have also added images that show the la mesa watershed and eco-park maybe to allow these different scenario elements to interplay within the fences of our imagination.

However, ultimately, i welcome experts and scientists to interpret the visual data and tell just what can happen to the communities in the area if the dams were to break?

Please note: the thin red line intruding on the landscape is the EAST VALLEY FAULT.

* * *

Wawa Dam

01_Eastwood and Wawa Dam02_Eastwood and Wawa Dam03_Eastwood and Wawa Dam04_Eastwood and Wawa Dam05_Eastwood and Wawa Dam06_Eastwood and Wawa Dam07_Eastwood and Wawa Dam08_Eastwood and Wawa Dam

terrain elevation

La Mesa Watershed and Eco-park

09_Eastwood and Wawa Dam10_Eastwood and Wawa Dam11_Eastwood and Wawa Dam12_Eastwood and Wawa Dam

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About Stuvwx

This blog was started in 2013; however, it actually began in 2010 but got corrupted and backups of the original helped to restart the present blog. Prior to 2010, i was emailing people Google maps with the fault trace. But it was in 2005 when i assembled my first map. In 1990, i got ahold of a photocopy of a tabloid size, black and white map when the former Phivolcs head, the late Ricardo Punongbayan gave an earthquake awareness seminar after the July 16 earthquake. i put away the map inside a cannister and rediscovered it 15 years later when i was going through my old stuff. Instantly, sirens went off inside my head and took stock of the situation on what i had: Windows in my computer (DOS ruled PCs 15 years earlier), Adobe Photoshop, a powerful image scanner and, most of all, a coffee table book of tiled large maps of Metro Manila. Fancying what i could accomplish with technology and a 15 year old map, i put my competency at work and scanned images and assembled them on my desktop computer. Lo and behold, even after checking the work several times, i got the jolt of my life when i discovered my rented house was actually sitting on top of a fault line! Not long after, i evacuated and resided far from any faultline. At the time, i was probably one of the few (not that i know anyone else) who assembled a map of the fault line. What were the chances that i assemble a fault line map as a weird activity and suddenly find myself and my family at risk and unaware that a silent, deadly fault line ran directly under our house. It was an epiphany! Since then i knew what i had to do, and God brought everything to pass easily and smoothly. However, truth to tell, creating the maps was so nerve-wracking and I could not have done it all if I weren’t a bit of obsessive-compulsive in me. For many months, everyday I had to devote about four hours piecing together up close snapshots of many topographical maps and later google maps to create this blog. I could say i literally spent tens of kilometers after kilometers assembling detailed maps and from the experience, I made many observations that I made posts of. The gratifying moment came when Phivolcs and the NDRRMC maybe through an influential follower of my blog, I suspect, launched a media blitz with campaign to protect the welfare of students whose schools, and many they are, are in the path of fault lines. I knew my work became basis of this and I couldn’t help but feel that i had accomplished at least one of my life’s purpose. i may just be accomplishing God’s will; but then again, maybe not. Only God knows. “There will be great earthquakes, and there will be famines and plagues in many lands, and there will be terrifying things and great miraculous signs from heaven.” -Luke 21:11 “At that very hour there was a severe earthquake and a tenth of the city collapsed. Seven thousand people were killed in the earthquake, and the survivors were terrified and gave glory to the God of heaven.” -Revelations 11:13 “Nation will rise against nation, and kingdom against kingdom. There will be famines and earthquakes in various places.” – Matthew 24:7 * * * * * * * * * * * * * * * * * * * * * * * * “Therefore will not we fear, though the earth be removed, and though the mountains be carried into the midst of the sea;” -Psalm 46:2 * * * * * * * * * * * * * * * * * * * * * * * *
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6 Responses to “So what about Eastwood Greenview in the shadow of Wawa Dam and La Mesa Dam?”

  1. jpb0716 says:

    hi sir..i like this site..very informative with images for better appreciation..Id like to note however that structures like dam or houses built near the faultline are safe provided they are designed by structural engineers who follows the code and built by contractors who follows the design drawings..please refer to this news..https://civilengstude.wordpress.com/ or http://www.gmanetwork.com/news/story/479394/scitech/science/can-manila-survive-a-nepal-level-earthquake

    for the case of wawa dam, i cant comment on its structural integrity if they have retrofitted it according to the latest code requirement..


  2. DOSENA ATB says:

    it happened already during typhoon ondoy


  3. sam says:

    how much wide the fault line from wawa dam to sanjose rodriguez rizal


    • tulisanes says:

      i stumbled on the fault line/s in the wawa dam vicinity by accident. i have no data on those faults except from a philippine map showing all the faults nation-wide which i downloaded from the phivolcs web site. it was a quick and fast and dirty job, including scaling up a real small section of an image, that a thin fine line depicting a faultline when blown up results in a rough thick line akin to broad brush strokes –hence, i think, why you ask “how wide the fault line from wawa dam.” again, i do not have the data that i cannot give pinpoint accuracy.


  4. R nolan says:

    It seems the Government and other officials do not take this as a disaster waiting to happen.


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