Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs
===================================================================
diff -u -r764d8b4def2fd6d7a3d296aae65dd5bed54f1828 -recc8ef0eb9c115e10464b534e6c83c2bb780f9d1
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision 764d8b4def2fd6d7a3d296aae65dd5bed54f1828)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision ecc8ef0eb9c115e10464b534e6c83c2bb780f9d1)
@@ -32,6 +32,8 @@
 using Core.Common.Gui.Forms.ProgressDialog;
 using Core.Common.Gui.Plugin;
 using Core.Common.Util;
+using Ringtoets.AssemblyTool.Data;
+using Ringtoets.Common.Data.AssemblyTool;
 using Ringtoets.Common.Data.AssessmentSection;
 using Ringtoets.Common.Data.Calculation;
 using Ringtoets.Common.Data.FailureMechanism;
@@ -224,7 +226,8 @@
             {
                 Text = context => Resources.GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContext_DisplayName,
                 Image = context => RingtoetsCommonFormsResources.GeneralFolderIcon,
-                ContextMenuStrip = GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContextMenuStrip
+                ContextMenuStrip = GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContextMenuStrip,
+                ChildNodeObjects = DesignWaterlevelCalculationsGroupContextChildNodeObjects
             };
 
             yield return new TreeNodeInfo<GrassCoverErosionOutwardsWaveHeightCalculationsGroupContext>
@@ -267,7 +270,7 @@
                                                                                  .Build()
             };
         }
-
+        
         public override IEnumerable<ExportInfo> GetExportInfos()
         {
             yield return new ExportInfo<HydraulicBoundariesGroupContext>
@@ -956,6 +959,38 @@
                       .Build();
         }
 
+        private static object[] DesignWaterlevelCalculationsGroupContextChildNodeObjects(GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContext context)
+        {
+            return new object[]
+            {
+                new GrassCoverErosionOutwardsDesignWaterLevelCalculationsContext(
+                    context.FailureMechanism.WaterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm,
+                    context.FailureMechanism, context.AssessmentSection, () => GetMechanismSpecificFactorizedSignalingHydraulicBoundaryNorm(
+                        context.AssessmentSection,
+                        context.FailureMechanism), Resources.Hydraulic_category_boundary_mechanismSpecificFactorizedSignalingNorm_name),
+                new GrassCoverErosionOutwardsDesignWaterLevelCalculationsContext(
+                    context.FailureMechanism.WaterLevelCalculationsForMechanismSpecificSignalingNorm,
+                    context.FailureMechanism, context.AssessmentSection, () => GetMechanismSpecificSignalingHydraulicBoundaryNorm(
+                        context.AssessmentSection,
+                        context.FailureMechanism), Resources.Hydraulic_category_boundary_mechanismSpecificSignalingNorm_name),
+                new GrassCoverErosionOutwardsDesignWaterLevelCalculationsContext(
+                    context.FailureMechanism.WaterLevelCalculationsForMechanismSpecificLowerLimitNorm,
+                    context.FailureMechanism, context.AssessmentSection, () => GetMechanismSpecificLowerLimitHydraulicBoundaryNorm(
+                        context.AssessmentSection,
+                        context.FailureMechanism), Resources.Hydraulic_category_boundary_mechanismSpecificLowerLimitNorm_name),
+                new GrassCoverErosionOutwardsDesignWaterLevelCalculationsContext(
+                    context.AssessmentSection.WaterLevelCalculationsForLowerLimitNorm,
+                    context.FailureMechanism, context.AssessmentSection, () => GetLowerLimitHydraulicBoundaryNorm(
+                        context.AssessmentSection,
+                        context.FailureMechanism), Resources.Hydraulic_category_boundary_lowerLimitNorm_name),
+                new GrassCoverErosionOutwardsDesignWaterLevelCalculationsContext(
+                    context.AssessmentSection.WaterLevelCalculationsForFactorizedLowerLimitNorm,
+                    context.FailureMechanism, context.AssessmentSection, () => GetFactorizedLowerLimitHydraulicBoundaryNorm(
+                        context.AssessmentSection,
+                        context.FailureMechanism), Resources.Hydraulic_category_boundary_factorizedLowerLimitNorm_name)
+            };
+        }
+
         #endregion
 
         #region GrassCoverErosionOutwardsWaveHeightCalculationsGroupContext TreeNodeInfo
@@ -980,5 +1015,58 @@
         }
 
         #endregion
+
+        #region Hydraulic boundary norms
+
+        private static double GetMechanismSpecificFactorizedSignalingHydraulicBoundaryNorm(IAssessmentSection assessmentSection,
+                                                                                           GrassCoverErosionOutwardsFailureMechanism failureMechanism)
+        {
+            return CreateFailureMechanismAssemblyCategories(assessmentSection, failureMechanism)
+                   .Single(c => c.Group == FailureMechanismSectionAssemblyCategoryGroup.IIv)
+                   .LowerBoundary;
+        }
+
+        private static double GetMechanismSpecificSignalingHydraulicBoundaryNorm(IAssessmentSection assessmentSection,
+                                                                                 GrassCoverErosionOutwardsFailureMechanism failureMechanism)
+        {
+            return CreateFailureMechanismAssemblyCategories(assessmentSection, failureMechanism)
+                   .Single(c => c.Group == FailureMechanismSectionAssemblyCategoryGroup.IIIv)
+                   .LowerBoundary;
+        }
+
+        private static double GetMechanismSpecificLowerLimitHydraulicBoundaryNorm(IAssessmentSection assessmentSection,
+                                                                                  GrassCoverErosionOutwardsFailureMechanism failureMechanism)
+        {
+            return CreateFailureMechanismAssemblyCategories(assessmentSection, failureMechanism)
+                   .Single(c => c.Group == FailureMechanismSectionAssemblyCategoryGroup.IVv)
+                   .LowerBoundary;
+        }
+
+        private static double GetLowerLimitHydraulicBoundaryNorm(IAssessmentSection assessmentSection,
+                                                                 GrassCoverErosionOutwardsFailureMechanism failureMechanism)
+        {
+            return CreateFailureMechanismAssemblyCategories(assessmentSection, failureMechanism)
+                   .Single(c => c.Group == FailureMechanismSectionAssemblyCategoryGroup.Vv)
+                   .LowerBoundary;
+        }
+
+        private static double GetFactorizedLowerLimitHydraulicBoundaryNorm(IAssessmentSection assessmentSection,
+                                                                           GrassCoverErosionOutwardsFailureMechanism failureMechanism)
+        {
+            return CreateFailureMechanismAssemblyCategories(assessmentSection, failureMechanism)
+                   .Single(c => c.Group == FailureMechanismSectionAssemblyCategoryGroup.VIv)
+                   .LowerBoundary;
+        }
+
+        private static IEnumerable<FailureMechanismSectionAssemblyCategory> CreateFailureMechanismAssemblyCategories(
+            IAssessmentSection assessmentSection, GrassCoverErosionOutwardsFailureMechanism failureMechanism)
+        {
+            return AssemblyToolCategoriesFactory.CreateFailureMechanismSectionAssemblyCategories(
+                assessmentSection.FailureMechanismContribution.SignalingNorm,
+                assessmentSection.FailureMechanismContribution.LowerLimitNorm,
+                failureMechanism.Contribution, failureMechanism.GeneralInput.N);
+        }
+
+        #endregion
     }
 }
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