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the ski area operation. In addition, the current snow- <br /> condition data collection effort will be expanded . Records <br /> on snowfall depths , storms , avalanche occurrence, wind <br /> action and exposure problems will be kept and utilized along <br /> with suitable terrain analysis , for planning ski area <br /> facilities . <br /> The data collection program will be carried out in <br /> accordance with the guidelines of the USDA Forest Service <br /> National Avalanche School manual, which suggests that : <br /> " terrain and climate analyses can be efficiently per- <br /> formed as follows : <br /> - Obtain the best quality maps available of the subject <br /> area (photo-topos if possible) . Study these maps , acquire a <br /> general feeling for the lay of the land . <br /> Terrain observations , summer . <br /> a . Analyze the terrain . <br /> 1 . Slope angles . <br /> 2 . Slope aspect . <br /> 3 . Residual snow patterns . <br /> b . Analyze the vegetation <br /> 1 . Growth patterns . <br /> 2 . Disaster species . <br /> 3 . Damage <br /> 4 . Debris . <br /> C . Study the area from the air , using a <br /> slow-flying fixed wing aircraft or <br /> helicopter . Acquire quality low <br /> angle aerial oblique photos of the <br /> area, winter and summer . <br /> d . Record data and observations on maps <br /> and photos . <br /> Terrain observations , winter . <br /> a . Snow deposition patterns . <br /> 1 . Drift zones . <br /> 2 . Scour zones . <br /> b . Avalanche activity . <br /> 1 . Location . <br /> 2 . . Size , type . <br /> 3 . Occurrence . <br /> -28- <br />