Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/GrassCoverErosionInwards/GrassCoverErosionInwardsOutputEntityReadExtensions.cs
===================================================================
diff -u -r8cb270db5fbcb82f19d6f3a390f083e9e0516d8c -reec680fe322aea5d1ecf8fdf1f14a273afdf6c53
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/GrassCoverErosionInwards/GrassCoverErosionInwardsOutputEntityReadExtensions.cs	(.../GrassCoverErosionInwardsOutputEntityReadExtensions.cs)	(revision 8cb270db5fbcb82f19d6f3a390f083e9e0516d8c)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/GrassCoverErosionInwards/GrassCoverErosionInwardsOutputEntityReadExtensions.cs	(.../GrassCoverErosionInwardsOutputEntityReadExtensions.cs)	(revision eec680fe322aea5d1ecf8fdf1f14a273afdf6c53)
@@ -46,7 +46,7 @@
                                                       Convert.ToBoolean(entity.IsOvertoppingDominant),
                                                       ReadProbabilityAssessmentOutput(entity),
                                                       GetDikeHeightAssessmentOutput(entity),
-                                                      null);
+                                                      GetOvertoppingRateAssessmentOutput(entity));
         }
 
         private static ProbabilityAssessmentOutput ReadProbabilityAssessmentOutput(GrassCoverErosionInwardsOutputEntity entity)
@@ -61,7 +61,13 @@
         private static SubCalculationAssessmentOutput GetDikeHeightAssessmentOutput(GrassCoverErosionInwardsOutputEntity entity)
         {
             GrassCoverErosionInwardsDikeHeightOutputEntity dikeHeightOutputEntity = entity.GrassCoverErosionInwardsDikeHeightOutputEntities.FirstOrDefault();
-            return dikeHeightOutputEntity != null ? dikeHeightOutputEntity.Read() : null;
+            return dikeHeightOutputEntity?.Read();
         }
+
+        private static SubCalculationAssessmentOutput GetOvertoppingRateAssessmentOutput(GrassCoverErosionInwardsOutputEntity entity)
+        {
+            GrassCoverErosionInwardsOvertoppingRateOutputEntity overtoppingRateOutputEntity = entity.GrassCoverErosionInwardsOvertoppingRateOutputEntities.FirstOrDefault();
+            return overtoppingRateOutputEntity?.Read();
+        }
     }
 }
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