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Primary Zone ~ The first 1000 feet of the Clear. Zone. Zone A - Arreaithat is included in a circumference drawn from both ends of the runway with a radius equal to 2/3 the length of the runway. Zone B - Area that is included in a circumference drawn from both ends of the runway with a radius equal to the length of the runway. With regards to Clear Zones, Mr. Koshak stated that the owners of the airport must own ~the,first 1000 feet or primary zone, by fee title. The second 1000 feet of p~operty would have to have deed restrictions to it. Mr. Koshak stated that zoning would have to be addressed -- there would be a need for a~zo~ing ordinance that would reflect the distance of the runway with a ~mdiu~ dealing with height limitations, density, etc. Mr. Koshak stated that Zone A would grandfather in existing buildings and limit future building. Zone B would have lesser restrictions. Commissioner Patz inquired if there is anything involved in upgrading the airport that could be considered impossible to accomplish. Mr. Koshak replied that a crosswind runway may be out at this time but the State is not pre~sing the issue. Commissioner Patz inquired as to building acquisition that would be required. Mr. Koshaklreplied that the first 1000 feet of clear zone (primary zone) should be ~in fee title -- on the north end, with some shuffling of the airport cQnfiguration, we can eliminate or include certain properties. On the south~end, it would not include Jimmy B's. In the second 1000 feet there is McGregors. The State Aeronautics Board will mandate ~ow properties in the second 1000 feet are to be dealt with; there is a possibility they may allow thelproject to start with the understanding that eventually property in that area will be acquired. Commissioner Sieber inquired if there weren't allowances made for buildings with hetgh~t restrictions. Mr. Koshak replied that the State Approach Slope ratio is 40 to 1 and the Federal APprOach Slope ratio is 20 to I and this pertains to p~wer poles and T.V. antennas -- the State is restricting public use. Commissioner $ieber inquired if raising and lengthening the runway suggests that ~here are safety factors to be considered. Mr. Koshak replied that if the runway were raised an aircraft would meet minimum cl. earance requirements set for railroad tracks and displacing the thresholdcreates no problem. Commissioner Patz noted that these restrictions would not compromise safety, that Minnesota is known for it's outstanding planning of airports. Commissioner Greenberg pointed out that raising the runway at one end would actually level it, that there is about a 6 foot difference from one end to the other~r~.ght now. AP/September 21, 1983 Page 3 of 8