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<br />Marian Meadows Rezone and Subdivision Final Environmental Impact Statement 3-105 <br />Alternative 2, PUD on the western portion of the site, would result in no lots being located completely or <br />partially in the outer safety zone. Up to 27 lots are located partially in the inner turning zone; however, <br />building areas are provided entirely outside of the ASZs. This alternative has a substantially lower <br />exposure to risk compared to Alternative 1 resulting from elimination of lots in the higher probability <br />ASZ 4, even though the total number of lots in ASZ 6 increases, reflecting the lower exposure in that <br />ASZ. <br />Alternative 3A and 3B, No Action Alternatives with up to 147 lots of 3 acres or greater in size would <br />comply with current Kittitas County land use regulations. It would result in seven lots being located <br />completely or partially within the outer safety zone and nine lots located completely or partially within <br />the inner turning zone. Of these 15 lots (some lots are in both zones) ,seven would have building areas <br />outside the safety zones, resulting in a net increase of eight lots with future residents exposed to the <br />higher risk from aviation accidents represented by the safety zones. The location of fewer lots in ASZ 4 <br />and the lower density results in a much lower exposure to risk compared to Alternative 1. <br />Alternative 3C with 3-acre lots has fewer overall lots at 33 in all ASZs with 9 in ASZ 4 and 24 in ASZ 6. <br />The fewer lots results in a lower exposure to risk than the larger number of lots in Alternatives 3A and 3B <br />and a substantially lower risk than Alternative 1. <br />Alternative 3D with 5-acre lots in all ASZs has a lower resulting risk because of the lower number of lots <br />and potential building areas in ASZs 3 and 4 and the lower density as indicated in Table 3-16. This <br />alternative has a substantial number of 3-acre lots to the east outside of the ASZs. <br />Alternatives 4 and 5, mitigation alternatives with about 147 and up to 113 lots, respectively, have a <br />building area for all lots entirely outside of ASZs 3 and 4, which have the highest risk of accidents. The <br />clustering of development in ASZ 5 substantially reduces the risk exposure as indicated in Table 3-16 as <br />compared to Alternatives 1 and 2. The larger number of lots in ASZ 6 and smaller lots, however, result in <br />a greater exposure than Alternatives 3A and 3B, which have a substantial component of their lots outside <br />of the ASZs. <br />For all the alternatives, there still remains the potential for aviation accidents outside the safety zones. <br />5 What are the likely cumulative impacts with development of nearby land at existing <br />zoning densities? <br />A total of 57 existing lots are located within the ASZs. Five lots in the Easton Acres neighborhood, six <br />lots in the Silver Creek neighborhood, and nine other lots appear to lie within the Outer Safety Zone ASZ <br />4. Nine lots in the Silver Creek neighborhood, 13 lots in the Easton Village neighborhood, and 15 other <br />lots are within the inner turning zone (ASZ 3). None of these parcels are large enough to be further <br />subdivided under the 3-acre minimum lot size in existing zoning and therefore hazard exposure in ASZs <br />1-4 is not likely to increase. Almost the entire area considered for cumulative land use impacts in Section <br />3.1 is within ASZ 6, resulting in the potential for up to 130 additional lots in that area.