Under normal conditions, getting a boat into LCRA water isn't a problem. Back it down the ramp and get it afloat. The problem is when conditions are abnormal such as in a drought, when water levels are low, or during a flood, when they are too high.
Public boat ramps on the Highland Lakes
Minimum lake level indicates the lowest lake elevation (in feet above mean sea level) that the ramps are usable. Lakes are often closed to recreational boaters during severe floods.