Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs
===================================================================
diff -u -r675f279fbcb7a1204f43c7de50be373cde96ca2e -r46b2b278e1a056fdbb961768feb79492c1bdbf04
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision 675f279fbcb7a1204f43c7de50be373cde96ca2e)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision 46b2b278e1a056fdbb961768feb79492c1bdbf04)
@@ -115,7 +115,7 @@
                 RingtoetsGrassCoverErosionOutwardsFormsResources.CalculationIcon,
                 null,
                 null,
-                null);
+                WaveConditionsCalculationContextOnNodeRemoved);
 
             yield return new TreeNodeInfo<FailureMechanismSectionResultContext<GrassCoverErosionOutwardsFailureMechanismSectionResult>>
             {
@@ -574,6 +574,24 @@
 
         #endregion
 
+        #region GrassCoverErosionOutwardsWaveConditionsCalculationContext TreeNodeInfo
+
+        private void WaveConditionsCalculationContextOnNodeRemoved(GrassCoverErosionOutwardsWaveConditionsCalculationContext nodeData,
+                                                                   object parentNodeData)
+        {
+            var calculationGroupContext = parentNodeData as GrassCoverErosionOutwardsWaveConditionsCalculationGroupContext;
+            if (calculationGroupContext != null)
+            {
+                bool successfullyRemovedData = calculationGroupContext.WrappedData.Children.Remove(nodeData.WrappedData);
+                if (successfullyRemovedData)
+                {
+                    calculationGroupContext.NotifyObservers();
+                }
+            }
+        }
+
         #endregion
+
+        #endregion
     }
 }
\ No newline at end of file