How to Create a Back of Sidewalk Drainage

Hi there! 

To anyone reading this, how exactly can I create a back of sidewalk drainage inlet. I have a situation where in project the typical section shows that that there is a 10' sidewalk and I wanted to create a back of sidewalk inlet to capture any offsite flow going into my project. Is there a specific Feature symbology that will let me create similar to what is shown in the standard index 425-060?