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Currently there are over 48,000 flights a year.
GC NPS has prepared a Draft EIS that address overflights by helicopters and planes with a "Preferred Alternative" that will allow up to 65,000 flights a year.
The "Preferred Alternative" flight zone map looks like this:
 (The full HiRes image can be downloaded at Here)
 Purple denotes the Flight Corridors.
So, although there are "no fly zones", sound won't stop at the line on the map.
Details can be found Here.
Comments can be made Here .
Brief, polite, specific comments are the most effective.
For instance a variation on - "I hike the Grand Canyon for solitude and peace. The current load of aircraft is much to high. Go down with the allowed flights, not up."
The Comment Period ends June 20th.
Edited by greg23 on 06/10/2011 17:30:30 MDT.
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