Hello @ARiggs -
Does your Soil Hydrologic Group raster have any values other than 1-4? This raster may only have values 1-4, corresponding with hydrologic soil groups A-D.
I’m noticing now that the Urban Stormwater model User Guide chapter is missing information in the Data Sources section, where we provide more detail about these layers, so I’ll fix that. In the meantime, here’s a link to more information about this layer.
If this is not the problem, it might be useful for us to take a look at your data. You can follow these instructions to package them up, and post them wherever works for you that we can access.
~ Stacie