Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs
===================================================================
diff -u -r7111575120feef926652228c88b963ae1c18287e -r1160fd3aa259e26d615ebe5ece611b9afd0cb546
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 7111575120feef926652228c88b963ae1c18287e)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 1160fd3aa259e26d615ebe5ece611b9afd0cb546)
@@ -24,6 +24,7 @@
 using System.Linq;
 using System.Windows.Forms;
 using Core.Common.Base;
+using Core.Common.Base.Data;
 using Core.Common.Controls.TreeView;
 using Core.Common.Gui;
 using Core.Common.Gui.ContextMenu;
@@ -74,7 +75,9 @@
             };
             yield return new PropertyInfo<PipingInputContext, PipingInputContextProperties>
             {
-                CreateInstance = context => new PipingInputContextProperties(context, new ObservablePropertyChangeHandler(context.PipingCalculation, context.WrappedData))
+                CreateInstance = context => new PipingInputContextProperties(context,
+                                                                             () => GetCalculatedAssessmentLevel(context.PipingCalculation),
+                                                                             new ObservablePropertyChangeHandler(context.PipingCalculation, context.WrappedData))
             };
             yield return new PropertyInfo<PipingOutputContext, PipingOutputContextProperties>();
             yield return new PropertyInfo<PipingSurfaceLinesContext, PipingSurfaceLineCollectionProperties>
@@ -606,6 +609,11 @@
 
         #endregion
 
+        private static RoundedDouble GetCalculatedAssessmentLevel(PipingCalculation calculation)
+        {
+            return calculation.InputParameters.HydraulicBoundaryLocation?.DesignWaterLevelCalculation1.Output?.Result ?? RoundedDouble.NaN;
+        }
+
         #region PipingFailureMechanismContext TreeNodeInfo
 
         private ContextMenuStrip FailureMechanismEnabledContextMenuStrip(PipingFailureMechanismContext pipingFailureMechanismContext,