Input to ColebrookWhite.exe is all into the text boxes on the top left, where the pipe diameter, a measure of surface roughness and slope of the pipe can be defined. Output can be read from the screen or saved in *.CSV files, containing some or all of the columns of data. The variable "Arch Ratio" defines the width of the chord that forms the water surface, divided by the height between water level and the pipe soffit. It will be used as part of calculations of flow through arched bridges and will be amalgamated with ManningCalc when ready.