The actual diameter varies due to segmented design. Building capacity is based on full charging with material at 32 degree angle of repose. If you would like your own copy of this handbook you can write to the Salt Institute at 700 North Fairfax Street, Fairfax Plaza, Suite 600, Alexandria, Virginia 22314-2040. Salt stored in an outdoor stockpile, if not properly covered and if continuously exposed to moisture, will become lumpy and difficult to handle and use. Wet and caked or lumpy salt is harder to handle with loaders and to move through spreaders.
Salt stored inside is easier to load and spread.
Inside storage eliminates the possibility of contaminating streams, wells or groundwater with salt runoff. Inside storage eliminates the loss of salt dissolved by precipitation. The Salt Institute highly recommends that all salt be stored in inside permanent facilities.