Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs
===================================================================
diff -u -r6d3c6a02f2fa74252b58a15592ec94785bd78c8a -rd696a981f204db5592dc3304d9ad8f4f7ef94128
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision 6d3c6a02f2fa74252b58a15592ec94785bd78c8a)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision d696a981f204db5592dc3304d9ad8f4f7ef94128)
@@ -1295,6 +1295,7 @@
                 return;
             }
 
+            var previousHydraulicBoundaryDatabase = assessmentSection.HydraulicBoundaryDatabase;
             using (var hydraulicBoundaryLocationsImporter = new HydraulicBoundaryDatabaseImporter())
             {
                 if (hydraulicBoundaryLocationsImporter.Import(assessmentSection, databaseFile))
@@ -1304,9 +1305,11 @@
                         ClearCalculations(assessmentSection);
                     }
 
-                    assessmentSection.GrassCoverErosionOutwards.SetGrassCoverErosionOutwardsHydraulicBoundaryLocations(assessmentSection.HydraulicBoundaryDatabase);
-                    assessmentSection.GrassCoverErosionOutwards.HydraulicBoundaryLocations.NotifyObservers();
-
+                    if (!ReferenceEquals(previousHydraulicBoundaryDatabase, assessmentSection.HydraulicBoundaryDatabase))
+                    {
+                        assessmentSection.GrassCoverErosionOutwards.SetGrassCoverErosionOutwardsHydraulicBoundaryLocations(assessmentSection.HydraulicBoundaryDatabase);
+                        assessmentSection.GrassCoverErosionOutwards.HydraulicBoundaryLocations.NotifyObservers();
+                    }
                     log.InfoFormat(RingtoetsFormsResources.RingtoetsPlugin_SetBoundaryDatabaseFilePath_Database_on_path_0_linked,
                                    assessmentSection.HydraulicBoundaryDatabase.FilePath);
                 }
Index: Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/TreeNodeInfos/HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs
===================================================================
diff -u -rde11965509b522ad5f7446e621a95737ed25da67 -rd696a981f204db5592dc3304d9ad8f4f7ef94128
--- Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/TreeNodeInfos/HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs	(.../HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs)	(revision de11965509b522ad5f7446e621a95737ed25da67)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/TreeNodeInfos/HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs	(.../HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs)	(revision d696a981f204db5592dc3304d9ad8f4f7ef94128)
@@ -34,6 +34,7 @@
 using NUnit.Framework;
 using Rhino.Mocks;
 using Ringtoets.Common.Data.AssessmentSection;
+using Ringtoets.GrassCoverErosionOutwards.Data;
 using Ringtoets.HydraRing.Data;
 using Ringtoets.Integration.Data;
 using Ringtoets.Integration.Forms.PresentationObjects;
@@ -254,6 +255,12 @@
         public void GivenNoFilePathIsSet_WhenOpeningValidFileFromContextMenu_ThenPathWillBeSetAndNotifiesObserverAndLogMessageAdded()
         {
             // Given
+            var assessmentSectionObserver = mocks.StrictMock<IObserver>();
+            assessmentSectionObserver.Expect(o => o.UpdateObserver());
+
+            var grassCoverErosionOutwardsLocationsObserver = mocks.StrictMock<IObserver>();
+            grassCoverErosionOutwardsLocationsObserver.Expect(o => o.UpdateObserver());
+
             string testFile = Path.Combine(testDataPath, "HRD dutch coast south.sqlite");
 
             int contextMenuImportHydraulicBoundaryDatabaseIndex = 0;
@@ -268,6 +275,9 @@
                 gui.Expect(cmp => cmp.Get(hydraulicBoundaryDatabaseContext, treeViewControl)).Return(new CustomItemsOnlyContextMenuBuilder());
                 mocks.ReplayAll();
 
+                assessmentSection.Attach(assessmentSectionObserver);
+                assessmentSection.GrassCoverErosionOutwards.HydraulicBoundaryLocations.Attach(grassCoverErosionOutwardsLocationsObserver);
+
                 DialogBoxHandler = (name, wnd) =>
                 {
                     OpenFileDialogTester tester = new OpenFileDialogTester(wnd);
@@ -292,6 +302,7 @@
                     });
 
                     Assert.IsNotNull(assessmentSection.HydraulicBoundaryDatabase);
+                    Assert.IsNotEmpty(assessmentSection.GrassCoverErosionOutwards.HydraulicBoundaryLocations);
                 }
             }
             mocks.VerifyAll();
@@ -393,6 +404,7 @@
             // Given
             string validFile = Path.Combine(testDataPath, "HRD dutch coast south.sqlite");
             IObserver assessmentObserver = mocks.StrictMock<IObserver>();
+            IObserver grassCoverErosionOutwardsLocationsObserver = mocks.StrictMock<IObserver>();
             int contextMenuImportHydraulicBoundaryDatabaseIndex = 0;
 
             AssessmentSection assessmentSection = new AssessmentSection(AssessmentSectionComposition.Dike);
@@ -416,6 +428,7 @@
             };
 
             assessmentSection.PipingFailureMechanism.CalculationsGroup.Children.Add(pipingCalculation);
+            assessmentSection.GrassCoverErosionOutwards.SetGrassCoverErosionOutwardsHydraulicBoundaryLocations(assessmentSection.HydraulicBoundaryDatabase);
 
             // Precondition
             Assert.IsNotNull(assessmentSection.HydraulicBoundaryDatabase);
@@ -424,6 +437,8 @@
             string currentFilePath = assessmentSection.HydraulicBoundaryDatabase.FilePath;
             string currentVersion = assessmentSection.HydraulicBoundaryDatabase.Version;
             var currentLocations = assessmentSection.HydraulicBoundaryDatabase.Locations;
+            var currentFirstGrassCoverErosionOutwardsLocation = assessmentSection.GrassCoverErosionOutwards.HydraulicBoundaryLocations.First();
+            assessmentSection.GrassCoverErosionOutwards.HydraulicBoundaryLocations.Attach(grassCoverErosionOutwardsLocationsObserver);
 
             using (TreeViewControl treeViewControl = new TreeViewControl())
             using (RingtoetsPlugin plugin = new RingtoetsPlugin())
@@ -456,6 +471,7 @@
                     CollectionAssert.AreEqual(currentLocations, assessmentSection.HydraulicBoundaryDatabase.Locations);
                     Assert.AreSame(assessmentSection.HydraulicBoundaryDatabase.Locations.First(), pipingCalculation.InputParameters.HydraulicBoundaryLocation);
                     Assert.AreSame(pipingOutput, pipingCalculation.Output);
+                    Assert.AreSame(currentFirstGrassCoverErosionOutwardsLocation, assessmentSection.GrassCoverErosionOutwards.HydraulicBoundaryLocations.First());
                 }
             }
             mocks.VerifyAll();
Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs
===================================================================
diff -u -r51d8e744ffb2168ca56ca4b6260ad9c2590c0170 -rd696a981f204db5592dc3304d9ad8f4f7ef94128
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs	(.../RingtoetsPluginTest.cs)	(revision 51d8e744ffb2168ca56ca4b6260ad9c2590c0170)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs	(.../RingtoetsPluginTest.cs)	(revision d696a981f204db5592dc3304d9ad8f4f7ef94128)
@@ -54,8 +54,6 @@
 using Ringtoets.Integration.Forms.PropertyClasses;
 using Ringtoets.Integration.Forms.Views;
 using Ringtoets.Integration.Forms.Views.SectionResultViews;
-using Ringtoets.Revetment.Forms.PresentationObjects;
-using Ringtoets.Revetment.Forms.PropertyClasses;
 using RingtoetsFormsResources = Ringtoets.Integration.Forms.Properties.Resources;
 using RingtoetsCommonFormsResources = Ringtoets.Common.Forms.Properties.Resources;
 using RingtoetsCommonServiceResources = Ringtoets.Common.Service.Properties.Resources;