Storage Area: “11a2″ has a minimum elevation specified in the geometry as -1(ft) and is connected to :”XS: RS=3.5” which has a minimum elevation of -3.17(ft)
The storage area and XS have different minimum elevation. Do they have to be same min elevation?
See attach screen capture for the connection to XS , instead of LS.
You just need to edit the storage area’s first point to an elevation -3.17 or lower. You can set your -1 elev vol to 0.01 if you want to keep that point