Index: Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Service/StabilityStoneCoverWaveConditionsCalculationService.cs
===================================================================
diff -u -re2892835ceb1c916be9a9122ba372858f20b981a -r80de235bcb060dec1747e166ac28c1c8db92a20a
--- Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Service/StabilityStoneCoverWaveConditionsCalculationService.cs	(.../StabilityStoneCoverWaveConditionsCalculationService.cs)	(revision e2892835ceb1c916be9a9122ba372858f20b981a)
+++ Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Service/StabilityStoneCoverWaveConditionsCalculationService.cs	(.../StabilityStoneCoverWaveConditionsCalculationService.cs)	(revision 80de235bcb060dec1747e166ac28c1c8db92a20a)
@@ -121,7 +121,7 @@
 
             double norm = assessmentSection.FailureMechanismContribution.Norm;
             string preprocessorDirectory = assessmentSection.HydraulicBoundaryDatabase.EffectivePreprocessorDirectory();
-            TotalWaterLevelCalculations = calculation.InputParameters.WaterLevels.Count() * 2;
+            TotalWaterLevelCalculations = calculation.InputParameters.GetWaterLevels(calculation.InputParameters.AssessmentLevel).Count() * 2;
 
             try
             {
Index: Ringtoets/WaveImpactAsphaltCover/src/Ringtoets.WaveImpactAsphaltCover.Service/WaveImpactAsphaltCoverWaveConditionsCalculationService.cs
===================================================================
diff -u -re2892835ceb1c916be9a9122ba372858f20b981a -r80de235bcb060dec1747e166ac28c1c8db92a20a
--- Ringtoets/WaveImpactAsphaltCover/src/Ringtoets.WaveImpactAsphaltCover.Service/WaveImpactAsphaltCoverWaveConditionsCalculationService.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationService.cs)	(revision e2892835ceb1c916be9a9122ba372858f20b981a)
+++ Ringtoets/WaveImpactAsphaltCover/src/Ringtoets.WaveImpactAsphaltCover.Service/WaveImpactAsphaltCoverWaveConditionsCalculationService.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationService.cs)	(revision 80de235bcb060dec1747e166ac28c1c8db92a20a)
@@ -113,7 +113,7 @@
 
             double norm = assessmentSection.FailureMechanismContribution.Norm;
             string preprocessorDirectory = assessmentSection.HydraulicBoundaryDatabase.EffectivePreprocessorDirectory();
-            TotalWaterLevelCalculations = calculation.InputParameters.WaterLevels.Count();
+            TotalWaterLevelCalculations = calculation.InputParameters.GetWaterLevels(calculation.InputParameters.AssessmentLevel).Count();
 
             try
             {
Index: Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationContextTreeNodeInfoTest.cs
===================================================================
diff -u -r29cd4757872926f61fce4ba52a46aea08889cbde -r80de235bcb060dec1747e166ac28c1c8db92a20a
--- Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationContextTreeNodeInfoTest.cs)	(revision 29cd4757872926f61fce4ba52a46aea08889cbde)
+++ Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationContextTreeNodeInfoTest.cs)	(revision 80de235bcb060dec1747e166ac28c1c8db92a20a)
@@ -1598,7 +1598,7 @@
                 gui.Stub(g => g.Get(context, treeViewControl)).Return(menuBuilder);
                 gui.Stub(g => g.MainWindow).Return(mainWindow);
 
-                int nrOfCalculators = calculation.InputParameters.WaterLevels.Count();
+                int nrOfCalculators = calculation.InputParameters.GetWaterLevels(calculation.InputParameters.AssessmentLevel).Count();
                 var calculatorFactory = mocks.Stub<IHydraRingCalculatorFactory>();
                 calculatorFactory.Expect(cf => cf.CreateWaveConditionsCosineCalculator(testDataPath, string.Empty))
                                  .Return(new TestWaveConditionsCosineCalculator())
Index: Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -r39e18750ccb61ad1f367279f9dac39a232d4f843 -r80de235bcb060dec1747e166ac28c1c8db92a20a
--- Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision 39e18750ccb61ad1f367279f9dac39a232d4f843)
+++ Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision 80de235bcb060dec1747e166ac28c1c8db92a20a)
@@ -1257,7 +1257,7 @@
 
                 int nrOfCalculators = failureMechanism.Calculations
                                                       .Cast<WaveImpactAsphaltCoverWaveConditionsCalculation>()
-                                                      .Sum(c => c.InputParameters.WaterLevels.Count());
+                                                      .Sum(c => c.InputParameters.GetWaterLevels(c.InputParameters.AssessmentLevel).Count());
                 var calculatorFactory = mocks.Stub<IHydraRingCalculatorFactory>();
                 calculatorFactory.Expect(cf => cf.CreateWaveConditionsCosineCalculator(hrdPath, string.Empty))
                                  .Return(new TestWaveConditionsCosineCalculator())