In order to cut only one full depth pass in both contour and roughing operations you will need to edit the definition and choose the Contour or Roughing tab. You will see the Depth parameters section in this tab and you will see a first and max cut amount if the Method selected is "Equal". This is the default setting in CAMWorks. If you set both the first and max cut amounts to the exact depth of the feature, you will get one pass and the full depth.
To see the depth of the part, you can click on a vertical edge along the wall like the one highlighted in blue below. You will then see the depth at the bottom of your screen as a measurement.