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six miles. Mr. Tallon could not u.nderstand how a 150 foot tower would be necessary as opposed to 120 feet since they would be above the tree lines and the curvature of the earth. Ms. Delvalle stated that the RF propagation showed that the saturation of the signal is not great enough to be received within the buildings in the Great Northern area, including the two high rise apartment build.ings. Mr. Tallon still doubted that 150 feet would be necessary when the buildings were less than 5,000 feet away. Mr. Diaconu, also representing Nextel, advised that the height was necessary to allow this tower to communicate with the other towers around it. He maintained that all their towers are between 150 to 180 feet high and if the commission allowed only a 100 foot tower, he was not sure if they would install it. Mr. Tallon was still not convinced. Mr. Diaconu clarified that if a person were talking on the phone and moving from one range to the ?other, tlie signal would drop. Mr. Herbster questioned how fast a person have to go in the mall and Mr. Diaconu responded that the speed did not matter. Mr. Brennan asked if the antenna could not be put on a 19 story apartment building. Mr. Kruchten, who represented Nextel and just came into the room, stated that since the residents had been concerned about the height, they tested it at 130 feet and it did not work. The RF Engineers worked it out on the computer and with the antenna in the air, the system has to maintain a certain level while it travels from tower to tower. If that level get below a certain nu.mber, the conversation will drop, so 150 feet is the absolute miuimum height for the tower to work. Mr. Tallon questioned how this system differed from other systems. Mr. Kruchten advised that each system is unique based on the technology that they are using, for example the AT&T facility at Clague Park is a P.C.S. system and operates 1.8 gigahertz, and they are at about 820 to 860. The propagation of the energy that AT&T transmits out is completely different than what Nextel transmits, the FCC tells them where they have to trausmit and assigns a power level to them. Their levels are lower than those of radios, television, etc. By having more than one tower covering the whole area they re-use the frequencies thus add.ing capacity to the system. He clarified that if they had 40 frequencies and one tower, they could have 40 conversations going at one time, if they had 10 towers, they could reuse those frequencies over again. He maintained that they did try to locate on the apartment buildings, but they were in the wrong location and were too high; they have to be within a half of mile of the recreation center property. If this location is not approved, they would have to find a commercial parcel within this half mile area, but the recreation center was the bu11's eye and the only city properiy that worked. They tried the eity first so that the community would get the rent. The city had requested that it be placed in the back, but the residents at the community meeting wanted it moved forward, and they can locate the tower anywhere on this property. The revised drawings show the new location. He presented a drawing of the antenna which are 1 by 4 panels placed on the top of the tower. They are in negotiations with the city who is requ.iring that they provide room for three other carriers. Mr. Brennan questioned if other carriers might not have a problem locating on this pole since they could not locate on the AT&T pole. Mr. Kruchten stated that the next camers to come are using a P.C.S. system who have frequencies that do not interfere with them, so the standard 20 foot separation would not be warranted. They have located with AT&T with less than 5 foot separation elsewhere because they are at Lwo different frequency ranges. Mr. Brennan was concerned that even though the FCC required cities to make provisions for tower locations, carriers were trying to put towers all over, without trying to combine them. Mr. Krutchen stated that they do try to combine them, one proposal was for them to bu.ild it at 200 feet but that would require lighting it under FAA rules; another was to build it as high as possible based. on the FAA regulations so as many carriers as possible could use it. Nextel is vvilliug to do whatever the city wants to allow for the co-locations. They could not use the Clague tower because the location would not work, not because they had to locate their antenna 20 feet away from AT&T's. They presented a diagram outlining where the towers were located in reference to this one. It was clarified that the Westlake tower was at the substation at Clague Road, but it was not shown on the map. The color chart showed the areas that were best in green, blue was next best, and red would not work. Chairman Tallon asked if they had considered using bark like material to cover the 4