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Tina O'Connell

New 2d_lfcsh in 2008

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Could someone please give me an example of this type of bridge shapefile. Is it supposed to be one polygon representing the deck of the bridge, or a series of polygons some of which are shaped as per the piers and inbetween the bridge deck? Also, does the first layer have to be to the underside or soffit of the deck, or can layer 1 be to the underside of the headstocks? ie does TUFLOW put a lid on layer 1 and increase the cell resistance even if layer 2 percentage blockage is not set to 100%?



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