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Thread: WTC Memorial - by Michael Arad (Architect) and Peter Walker (Landscape)

  1. #5071

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    They moved a lot of them somewhere.

  2. #5072

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    National September 11 Memorial & Museum on Facebook
    April 22, 2015



    The 9/11 Memorial is designed as one of the most sustainable green plazas ever built. It serves as an 8-acre green roof on top of seven stories of below-grade spaces. The irrigation and storm water harvesting systems will ensure sustainable treatment of the site and conserve energy, water and material resources. #EarthDay

  3. #5073
    Forum Veteran Tectonic's Avatar
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    Odd question but is the loading dock next to 1 WTC permanent?

  4. #5074

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    ^^ that picture is about 6 months old.


    The T1 loading dock is temporary until they can finish the permanent underground loading dock and VSC ramps to Vesey Street. They can't so that until the temporary PATH station is demolished, which will hopefully begin soon.

  5. #5075

  6. #5076
    Forum Veteran Tectonic's Avatar
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    Well they made it though winter. That survivor tree is such a show off.

  7. #5077
    NYC Aficionado from Oz Merry's Avatar
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    ^ Really nice to see, though .

    That aerial shot makes most of the area look like a total mess which, thankfully, appears to be less noticeable at ground level.

  8. #5078

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    Quote Originally Posted by Tectonic View Post
    Well they made it though winter. That survivor tree is such a show off.

    Lol that's a great word for it. It really is showing off.

  9. #5079

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    Tree health

    A quick walk through, and only a few trees seem to be in any sort of trouble. One is on the SW corner of the south pool, 2nd row back. Noticeably fewer leaves have come in compared to those around it. You can see it on earthcam. It looked fine in the shot from last year a few posts back. Maybe just late.

    However the entire line along the north side of the north pool look either dead or dying.

    Besides these, three or four on the Fulton St curb are also in bad shape.

    Some common problem here.


  10. #5080

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    There are chemicals in the memorial pool water to prevent bacteria growth. The north pool experiences more wind spray than the south pool, ie the swirling winds cause the water to mist into the air (sometimes requiring the pool to be turned off). The trees do not get along with whatever is in the water.

  11. #5081

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    I'm not sure, but I think we went over this. Bacteria is controlled by ultraviolet light treatment. Bromine is used to adjust the ph of the water to inhibit algae growth. The bromine isn't harmful to the trees, and they are tolerant to a wide range of ph.

    The answer may be simpler. If the wind spray is greater in that area, then maybe the environment is too wet.

    If so, simpler doesn't mean easier to fix. You can eliminate what's in the water, but how do you eliminate the water?

  12. #5082

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    The wind spray is much greater in that area, likely because of swirls created by the form of 1 WTC. So whether or not it's the bromine or something else in the water, it is in fact what caused these trees to deteriorate. The options I'm aware of are to turn the water off when wind sprays occur, or remove the perimeter of trees adjacent to the pool.

  13. #5083

  14. #5084

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    ...or remove the perimeter of trees adjacent to the pool.
    or find a more tolerant species to plant

  15. #5085

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    Whatever it is, it's obviously Obama's fault.

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