Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GrassCoverErosionOutwardsFailureMechanism.cs
===================================================================
diff -u -r94d4a8c842278686ba4974fd35b40898d11d79af -r68dedcde06592e2c864625e8d2e71c58c1183f73
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GrassCoverErosionOutwardsFailureMechanism.cs	(.../GrassCoverErosionOutwardsFailureMechanism.cs)	(revision 94d4a8c842278686ba4974fd35b40898d11d79af)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GrassCoverErosionOutwardsFailureMechanism.cs	(.../GrassCoverErosionOutwardsFailureMechanism.cs)	(revision 68dedcde06592e2c864625e8d2e71c58c1183f73)
@@ -40,12 +40,12 @@
                                                              IHasSectionResults<GrassCoverErosionOutwardsFailureMechanismSectionResult>
     {
         private readonly ObservableList<GrassCoverErosionOutwardsFailureMechanismSectionResult> sectionResults;
-        private readonly IList<HydraulicBoundaryLocationCalculation> waterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm = new List<HydraulicBoundaryLocationCalculation>();
-        private readonly IList<HydraulicBoundaryLocationCalculation> waterLevelCalculationsForMechanismSpecificSignalingNorm = new List<HydraulicBoundaryLocationCalculation>();
-        private readonly IList<HydraulicBoundaryLocationCalculation> waterLevelCalculationsForMechanismSpecificLowerLimitNorm = new List<HydraulicBoundaryLocationCalculation>();
-        private readonly IList<HydraulicBoundaryLocationCalculation> waveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm = new List<HydraulicBoundaryLocationCalculation>();
-        private readonly IList<HydraulicBoundaryLocationCalculation> waveHeightCalculationsForMechanismSpecificSignalingNorm = new List<HydraulicBoundaryLocationCalculation>();
-        private readonly IList<HydraulicBoundaryLocationCalculation> waveHeightCalculationsForMechanismSpecificLowerLimitNorm = new List<HydraulicBoundaryLocationCalculation>();
+        private readonly ObservableList<HydraulicBoundaryLocationCalculation> waterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm = new ObservableList<HydraulicBoundaryLocationCalculation>();
+        private readonly ObservableList<HydraulicBoundaryLocationCalculation> waterLevelCalculationsForMechanismSpecificSignalingNorm = new ObservableList<HydraulicBoundaryLocationCalculation>();
+        private readonly ObservableList<HydraulicBoundaryLocationCalculation> waterLevelCalculationsForMechanismSpecificLowerLimitNorm = new ObservableList<HydraulicBoundaryLocationCalculation>();
+        private readonly ObservableList<HydraulicBoundaryLocationCalculation> waveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm = new ObservableList<HydraulicBoundaryLocationCalculation>();
+        private readonly ObservableList<HydraulicBoundaryLocationCalculation> waveHeightCalculationsForMechanismSpecificSignalingNorm = new ObservableList<HydraulicBoundaryLocationCalculation>();
+        private readonly ObservableList<HydraulicBoundaryLocationCalculation> waveHeightCalculationsForMechanismSpecificLowerLimitNorm = new ObservableList<HydraulicBoundaryLocationCalculation>();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="GrassCoverErosionOutwardsFailureMechanism"/> class.
@@ -91,50 +91,10 @@
         /// </summary>
         public ForeshoreProfileCollection ForeshoreProfiles { get; }
 
-        public IObservableEnumerable<GrassCoverErosionOutwardsFailureMechanismSectionResult> SectionResults
-        {
-            get
-            {
-                return sectionResults;
-            }
-        }
-
         /// <summary>
-        /// Sets hydraulic boundary location calculations for <paramref name="hydraulicBoundaryLocations"/>.
-        /// </summary>
-        /// <param name="hydraulicBoundaryLocations">The hydraulic boundary locations to add calculations for.</param>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="hydraulicBoundaryLocations"/> is <c>null</c>.</exception>
-        public void SetHydraulicBoundaryLocationCalculations(IEnumerable<HydraulicBoundaryLocation> hydraulicBoundaryLocations)
-        {
-            if (hydraulicBoundaryLocations == null)
-            {
-                throw new ArgumentNullException(nameof(hydraulicBoundaryLocations));
-            }
-
-            ClearHydraulicBoundaryLocationCalculations();
-
-            foreach (HydraulicBoundaryLocation hydraulicBoundaryLocation in hydraulicBoundaryLocations)
-            {
-                AddHydraulicBoundaryLocationCalculations(hydraulicBoundaryLocation);
-            }
-        }
-
-        public override void AddSection(FailureMechanismSection section)
-        {
-            base.AddSection(section);
-            sectionResults.Add(new GrassCoverErosionOutwardsFailureMechanismSectionResult(section));
-        }
-
-        public override void ClearAllSections()
-        {
-            base.ClearAllSections();
-            sectionResults.Clear();
-        }
-
-        /// <summary>
         /// Gets the water level calculations corresponding to the mechanism specific factorized signaling norm.
         /// </summary>
-        public IEnumerable<HydraulicBoundaryLocationCalculation> WaterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm
+        public IObservableEnumerable<HydraulicBoundaryLocationCalculation> WaterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm
         {
             get
             {
@@ -145,7 +105,7 @@
         /// <summary>
         /// Gets the water level calculations corresponding to the mechanism specific signaling norm.
         /// </summary>
-        public IEnumerable<HydraulicBoundaryLocationCalculation> WaterLevelCalculationsForMechanismSpecificSignalingNorm
+        public IObservableEnumerable<HydraulicBoundaryLocationCalculation> WaterLevelCalculationsForMechanismSpecificSignalingNorm
         {
             get
             {
@@ -156,7 +116,7 @@
         /// <summary>
         /// Gets the water level calculations corresponding to the mechanism specific lower limit norm.
         /// </summary>
-        public IEnumerable<HydraulicBoundaryLocationCalculation> WaterLevelCalculationsForMechanismSpecificLowerLimitNorm
+        public IObservableEnumerable<HydraulicBoundaryLocationCalculation> WaterLevelCalculationsForMechanismSpecificLowerLimitNorm
         {
             get
             {
@@ -167,7 +127,7 @@
         /// <summary>
         /// Gets the wave height calculations corresponding to the mechanism specific factorized signaling norm.
         /// </summary>
-        public IEnumerable<HydraulicBoundaryLocationCalculation> WaveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm
+        public IObservableEnumerable<HydraulicBoundaryLocationCalculation> WaveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm
         {
             get
             {
@@ -178,7 +138,7 @@
         /// <summary>
         /// Gets the wave height calculations corresponding to the mechanism specific signaling norm.
         /// </summary>
-        public IEnumerable<HydraulicBoundaryLocationCalculation> WaveHeightCalculationsForMechanismSpecificSignalingNorm
+        public IObservableEnumerable<HydraulicBoundaryLocationCalculation> WaveHeightCalculationsForMechanismSpecificSignalingNorm
         {
             get
             {
@@ -189,14 +149,54 @@
         /// <summary>
         /// Gets the wave height calculations corresponding to the mechanism specific lower limit norm.
         /// </summary>
-        public IEnumerable<HydraulicBoundaryLocationCalculation> WaveHeightCalculationsForMechanismSpecificLowerLimitNorm
+        public IObservableEnumerable<HydraulicBoundaryLocationCalculation> WaveHeightCalculationsForMechanismSpecificLowerLimitNorm
         {
             get
             {
                 return waveHeightCalculationsForMechanismSpecificLowerLimitNorm;
             }
         }
 
+        public IObservableEnumerable<GrassCoverErosionOutwardsFailureMechanismSectionResult> SectionResults
+        {
+            get
+            {
+                return sectionResults;
+            }
+        }
+
+        /// <summary>
+        /// Sets hydraulic boundary location calculations for <paramref name="hydraulicBoundaryLocations"/>.
+        /// </summary>
+        /// <param name="hydraulicBoundaryLocations">The hydraulic boundary locations to add calculations for.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="hydraulicBoundaryLocations"/> is <c>null</c>.</exception>
+        public void SetHydraulicBoundaryLocationCalculations(IEnumerable<HydraulicBoundaryLocation> hydraulicBoundaryLocations)
+        {
+            if (hydraulicBoundaryLocations == null)
+            {
+                throw new ArgumentNullException(nameof(hydraulicBoundaryLocations));
+            }
+
+            ClearHydraulicBoundaryLocationCalculations();
+
+            foreach (HydraulicBoundaryLocation hydraulicBoundaryLocation in hydraulicBoundaryLocations)
+            {
+                AddHydraulicBoundaryLocationCalculations(hydraulicBoundaryLocation);
+            }
+        }
+
+        public override void AddSection(FailureMechanismSection section)
+        {
+            base.AddSection(section);
+            sectionResults.Add(new GrassCoverErosionOutwardsFailureMechanismSectionResult(section));
+        }
+
+        public override void ClearAllSections()
+        {
+            base.ClearAllSections();
+            sectionResults.Clear();
+        }
+
         private void ClearHydraulicBoundaryLocationCalculations()
         {
             waterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm.Clear();