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7.1.4 Roads, drives, walks, and railroads. Railroads shall have top of <br /> rail elevation on both rails at 50-foot intervals. In addition, show all <br /> switch locations, the weight of rails, and the condition of the rails, ties <br /> and ballast. Sketch a typical section of the rails. All roads shall be iden- <br /> tified by name and/or number, and have elevations shown at 50-foot intervals <br /> along the centerline and each edge of road. In addition, show the type of <br /> surfacing, and general condition of road. <br /> 7. 1.5 Fences (location, type, and height) . Indicate type of wire and <br /> posts (pipe, wood, concrete, and so forth) , and provide coordinates at each <br /> corner to the closest 1.0 foot. <br /> 7.1.6 Trees. Locate and show each tree line, and indicate the types <br /> and average diameter on the topo sheets. The diameter is measured five feet <br /> above natural ground. Show and identify all trees that are individually iso- <br /> lated outside of the tree line. <br /> 7. 1.7 Ditches, streams, canals, ponds, lakes, and so forth. Identify <br /> by name (if possible) , show the elevation of the top of the water to the <br /> closest one-hundreth of a foot (0.01 ft) , and show the direction of the flow <br /> (if possible) . <br /> 7. 1.8 Other visible surface features. Locate and show any storage <br /> tanks, radio antennas, monitoring wells, or other surface features visible and <br /> located within the area to be surveyed. Areas with active erosion shall be <br /> noted and located. <br /> 7.2 Established elevations. Spot elevations affecting the design of <br /> the facilities shall be provided, such as ground elevations, elevations on ex- <br /> isting utilities, and on visible surface features within the area to be sur- <br /> veyed. Specifically, break points or changes in grades or terrain shall be <br /> provided, such as tops of hills, bottoms of ditches and gullies, high bank <br /> elevations, and so forth. Ground elevations shall be to the closest one-tenth <br /> of a foot (0.1) ; all other elevations (roads, railroads, finished floors, <br /> utility lines, drainage structures, monitoring wells, and so forth) shall be <br /> to the closest one-hundredth of a foot (0.01 foot) . Cross sections of the <br /> strip surveys shall be taken at 50 foot stations. The elevations for the <br /> cross sections shall be taken at the centerline, 25 foot ranges each side of <br /> the centerline, and at all breaks or changes in grade. <br /> AA-22 <br />