Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationRow.cs
===================================================================
diff -u -ra61a8c6b3b7dcf4126ad67dd8ca79ba514839a08 -r41a973b2c5890223e7636f9a5e50cc2777e56a41
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationRow.cs	(.../GrassCoverErosionInwardsCalculationRow.cs)	(revision a61a8c6b3b7dcf4126ad67dd8ca79ba514839a08)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationRow.cs	(.../GrassCoverErosionInwardsCalculationRow.cs)	(revision 41a973b2c5890223e7636f9a5e50cc2777e56a41)
@@ -110,11 +110,11 @@
 
         public DataGridViewComboBoxItemWrapper<DikeProfile> DikeProfile { get; set; }
 
-        public bool UseDam { get; set; }
+        public bool UseBreakWater { get; set; }
 
-        public DataGridViewComboBoxItemWrapper<DamType> DamType { get; set; }
+        public DataGridViewComboBoxItemWrapper<BreakWaterType> BreakWaterType { get; set; }
 
-        public double Damheight { get; set; }
+        public double BreakWaterHeight { get; set; }
 
         public bool UseForeShoreGeometry { get; set; }
 
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationsView.cs
===================================================================
diff -u -r9d45eb42d66159f6b0132b739d70c918bcf3f1f8 -r41a973b2c5890223e7636f9a5e50cc2777e56a41
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationsView.cs	(.../GrassCoverErosionInwardsCalculationsView.cs)	(revision 9d45eb42d66159f6b0132b739d70c918bcf3f1f8)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationsView.cs	(.../GrassCoverErosionInwardsCalculationsView.cs)	(revision 41a973b2c5890223e7636f9a5e50cc2777e56a41)
@@ -49,6 +49,7 @@
     public partial class GrassCoverErosionInwardsCalculationsView : UserControl, ISelectionProvider, IView
     {
         private const int selectableHydraulicBoundaryLocationColumnIndex = 1;
+        private const int selectableDikeProfileColumnIndex = 2;
         private readonly Observer grassCoverErosionInwardsFailureMechanismObserver;
         private readonly Observer hydraulicBoundaryLocationsObserver;
         private readonly RecursiveObserver<CalculationGroup, GrassCoverErosionInwardsInput> grassCoverErosionInwardsInputObserver;
@@ -188,17 +189,17 @@
                 nameof(DataGridViewComboBoxItemWrapper<DikeProfile>.This),
                 nameof(DataGridViewComboBoxItemWrapper<SelectableHydraulicBoundaryLocation>.DisplayName));
 
-            dataGridViewControl.AddCheckBoxColumn(nameof(GrassCoverErosionInwardsCalculationRow.UseDam), Resources.GrassCoverErosionInwardsCalculation_Use_Dam);
+            dataGridViewControl.AddCheckBoxColumn(nameof(GrassCoverErosionInwardsCalculationRow.UseBreakWater), Resources.GrassCoverErosionInwardsCalculation_Use_Dam);
 
             dataGridViewControl.AddComboBoxColumn<DataGridViewComboBoxItemWrapper<DamType>>(
-                nameof(GrassCoverErosionInwardsCalculationRow.DamType),
+                nameof(GrassCoverErosionInwardsCalculationRow.BreakWaterType),
                 Resources.GrassCoverErosionInwardsCalculation_Damtype,
                 null,
                 nameof(DataGridViewComboBoxItemWrapper<DikeProfile>.This),
                 nameof(DataGridViewComboBoxItemWrapper<DamType>.DisplayName));
 
             dataGridViewControl.AddTextBoxColumn(
-                nameof(GrassCoverErosionInwardsCalculationRow.Damheight),
+                nameof(GrassCoverErosionInwardsCalculationRow.BreakWaterHeight),
                 Resources.GrassCoverErosionInwardsCalculation_Damheight);
 
             dataGridViewControl.AddCheckBoxColumn(nameof(GrassCoverErosionInwardsCalculationRow.UseForeShoreGeometry), Resources.GrassCoverErosionInwardsCalculation_Use_ForeShoreGeometry);
@@ -335,13 +336,23 @@
 
         private void PrefillComboBoxListItemsAtColumnLevel()
         {
-            var selectableHydraulicBoundaryLocationColumn = (DataGridViewComboBoxColumn) dataGridViewControl.GetColumnFromIndex(selectableHydraulicBoundaryLocationColumnIndex);
+            var selectableHydraulicBoundaryLocationColumn = (DataGridViewComboBoxColumn)dataGridViewControl.GetColumnFromIndex(selectableHydraulicBoundaryLocationColumnIndex);
 
+            // Need to prefill for all possible data in order to guarantee 'combo box' columns
+            // do not generate errors when their cell value is not present in the list of available
+            // items.
             using (new SuspendDataGridViewColumnResizes(selectableHydraulicBoundaryLocationColumn))
             {
                 SetItemsOnObjectCollection(selectableHydraulicBoundaryLocationColumn.Items,
                                            GetSelectableHydraulicBoundaryLocationsDataSource(GetSelectableHydraulicBoundaryLocationsFromFailureMechanism()).ToArray());
             }
+
+            // var selectableDikeProfileColumn = (DataGridViewComboBoxColumn)dataGridViewControl.GetColumnFromIndex(selectableDikeProfileColumnIndex);
+            //
+            // using (new SuspendDataGridViewColumnResizes(selectableDikeProfileColumn))
+            // {
+            //     SetItemsOnObjectCollection(selectableDikeProfileColumn.Items,  )
+            // }
         }
 
         private IEnumerable<SelectableHydraulicBoundaryLocation> GetSelectableHydraulicBoundaryLocationsFromFailureMechanism()