Laserfiche WebLink
d <br />U <br />II <br />7.2 Soil Inventory <br />Soil types in the runway area, as delineated by the Soil <br />Conservation Service in the soil survey of Anoka County <br />1977 map sheet 43, includes Hubbard coarse sand, 0 -2 per- <br />cent slopes (HUA), Hubbard coarse sand, 2 -6 percent slopes <br />(HUB), and an abandoned gravel pit (G.P.) at the intersec- <br />tion of the existing runways. The Hubbard series have a <br />Unified soil classification of SM or SP and an AASHTO <br />classification of A -1 or A -2. <br />7.3 Alternative A <br />Figure 1 -1 illustrates Alternative A. As shown, a single <br />3300 feet paved runway would be developed on virtually the <br />same alignment as existing Runway 16 -34. The runway would <br />be shifted approximately 170 feet north of the existing <br />threshold and terminate approximately 300 feet south of the <br />County State Aid Highway (CSAH) 116 right -of -way. <br />In order to achieve necessary approach clearances (23 feet <br />over the railroad and 15 feet over CSAH 16), the proposed <br />runway ends would have to be raised significantly. Figure <br />7 -2 illustrates a centerline profile of the runway which <br />would achieve adequate clearances without relocation of CSAH <br />116 yet limits the amount of fill required. The southerly <br />end of the runway would require approximately 15 feet of <br />fill while the northern end would require approximately <br />eight feet of fill. <br />The disadvantages of this concept are that the runway is <br />severely restricted, the additional costs of fill, and the <br />resulting undesireable runway profile constructed on a man- <br />made "ridge ". <br />7.4 Alternative B <br />Figure 7 -3 illustrates Alternative B. This concept also <br />provides a single 3300 feet paved runway oriented in a 16 -34 <br />direction. The proposed runway is shifted approximately 550 <br />feet to the north of the existing threshold and rotated one <br />degree. The rotation eliminates a restaurant from the south <br />clear zone and also eliminates two residential parcels east <br />of Limonite Street from the north clear zone. <br />' The northward shift of the runway, however, does necessitate <br />the relocation of CSAH 116 and impacts up to seven addi- <br />tional residences to the north. The relocation of CSAH 116 <br />as proposed would intersect County Road 56 at 149th Avenue <br />' Northwest. The westward extension of CSAH 116 would then <br />follow along the originally planned alignment approximately <br />one quarter mile north of the currently planned alignment. <br />7 -2 <br />