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The Illinois Concrete Pipe Association is a non-profit trade association composed of concrete pipe producers (and affiliated companies) serving Illinois sewer ...
D-load  embankment Spangler  joints head tail water  N-values  precast pipe class  public works ACPA  sanitary storm sewers 
www.il-concretepipe.org - 2009-02-07
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HydroCAD, computer software for modeling stormwater runoff and designing stormwater management systems
curve number  detention time  manning's number 
www.hydrocad.net - 2009-02-15
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