Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/AssessmentSectionMergeHandlerStub.cs
===================================================================
diff -u -rf5113e70c06bc0398db3e71d59f2e31d80cf53e3 -r8236be8aa07b5ba510fe9a4a3f2b32c525712061
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/AssessmentSectionMergeHandlerStub.cs	(.../AssessmentSectionMergeHandlerStub.cs)	(revision f5113e70c06bc0398db3e71d59f2e31d80cf53e3)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/AssessmentSectionMergeHandlerStub.cs	(.../AssessmentSectionMergeHandlerStub.cs)	(revision 8236be8aa07b5ba510fe9a4a3f2b32c525712061)
@@ -20,7 +20,9 @@
 // All rights reserved.
 
 using System.Collections.Generic;
+using System.Linq;
 using Ringtoets.Common.Data.FailureMechanism;
+using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.Integration.Data;
 
 namespace Ringtoets.Integration.Plugin.Handlers
@@ -31,6 +33,26 @@
     public class AssessmentSectionMergeHandlerStub : IAssessmentSectionMergeHandler
     {
         public void PerformMerge(AssessmentSection originalAssessmentSection, AssessmentSection assessmentSectionToMerge,
-                                 IEnumerable<IFailureMechanism> failureMechanismToMerge) {}
+                                 IEnumerable<IFailureMechanism> failureMechanismToMerge)
+        {
+            for (var i = 0; i < originalAssessmentSection.HydraulicBoundaryDatabase.Locations.Count; i++)
+            {
+                ReplaceOutput(originalAssessmentSection.WaterLevelCalculationsForFactorizedSignalingNorm.ElementAt(i), assessmentSectionToMerge.WaterLevelCalculationsForFactorizedSignalingNorm.ElementAt(i));
+                ReplaceOutput(originalAssessmentSection.WaterLevelCalculationsForSignalingNorm.ElementAt(i), assessmentSectionToMerge.WaterLevelCalculationsForSignalingNorm.ElementAt(i));
+                ReplaceOutput(originalAssessmentSection.WaterLevelCalculationsForLowerLimitNorm.ElementAt(i), assessmentSectionToMerge.WaterLevelCalculationsForLowerLimitNorm.ElementAt(i));
+                ReplaceOutput(originalAssessmentSection.WaterLevelCalculationsForFactorizedLowerLimitNorm.ElementAt(i), assessmentSectionToMerge.WaterLevelCalculationsForFactorizedLowerLimitNorm.ElementAt(i));
+
+                ReplaceOutput(originalAssessmentSection.WaveHeightCalculationsForFactorizedSignalingNorm.ElementAt(i), assessmentSectionToMerge.WaveHeightCalculationsForFactorizedSignalingNorm.ElementAt(i));
+                ReplaceOutput(originalAssessmentSection.WaveHeightCalculationsForSignalingNorm.ElementAt(i), assessmentSectionToMerge.WaveHeightCalculationsForSignalingNorm.ElementAt(i));
+                ReplaceOutput(originalAssessmentSection.WaveHeightCalculationsForLowerLimitNorm.ElementAt(i), assessmentSectionToMerge.WaveHeightCalculationsForLowerLimitNorm.ElementAt(i));
+                ReplaceOutput(originalAssessmentSection.WaveHeightCalculationsForFactorizedLowerLimitNorm.ElementAt(i), assessmentSectionToMerge.WaveHeightCalculationsForFactorizedLowerLimitNorm.ElementAt(i));
+            }
+        }
+
+        private static void ReplaceOutput(HydraulicBoundaryLocationCalculation originalCalculation, HydraulicBoundaryLocationCalculation newCalculation)
+        {
+            originalCalculation.Output = newCalculation.Output;
+            originalCalculation.NotifyObservers();
+        }
     }
 }
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