Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityOutwards/MacroStabilityOutwardsKernelWrapper.cs
===================================================================
diff -u -r6851 -r6856
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityOutwards/MacroStabilityOutwardsKernelWrapper.cs	(.../MacroStabilityOutwardsKernelWrapper.cs)	(revision 6851)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityOutwards/MacroStabilityOutwardsKernelWrapper.cs	(.../MacroStabilityOutwardsKernelWrapper.cs)	(revision 6856)
@@ -100,8 +100,7 @@
 
                 const bool useRiverLevelLow = true;
                 // Determine PL-lines and create waternet
-                var upliftHelper = new UpliftHelper();
-                PlLines plLines = upliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out _, out string warningMessage);
+                PlLines plLines = UpliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out _, out string warningMessage);
                 Waternet waterNet = MacroStabilityCommonHelper.CreateWaternet(damKernelInput, plLines);
                 if (warningMessage != null)
                 {
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/Common/UpliftHelperTests.cs
===================================================================
diff -u -r6851 -r6856
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/Common/UpliftHelperTests.cs	(.../UpliftHelperTests.cs)	(revision 6851)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/Common/UpliftHelperTests.cs	(.../UpliftHelperTests.cs)	(revision 6856)
@@ -42,12 +42,11 @@
         damKernelInput.SubSoilScenario.SoilProfile2D = soilProfile2D;
 
         damKernelInput.Location.CurrentScenario.UpliftCriterionStability = 1.2;
-        var upliftHelper = new UpliftHelper();
-        upliftHelper.DeterminePlLinesForStability(damKernelInput, false, out UpliftSituation upliftSituation, out _);
+        UpliftHelper.DeterminePlLinesForStability(damKernelInput, false, out UpliftSituation upliftSituation, out _);
         Assert.That(upliftSituation.IsUplift, Is.True);
 
         damKernelInput.Location.CurrentScenario.UpliftCriterionStability = 0.8;
-        upliftHelper.DeterminePlLinesForStability(damKernelInput, false, out upliftSituation, out _);
+        UpliftHelper.DeterminePlLinesForStability(damKernelInput, false, out upliftSituation, out _);
         Assert.That(upliftSituation.IsUplift, Is.False);
     }
 
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedKernelWrapperTests.cs
===================================================================
diff -u -r6851 -r6856
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedKernelWrapperTests.cs	(.../WtiPipingSellmeijerRevisedKernelWrapperTests.cs)	(revision 6851)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedKernelWrapperTests.cs	(.../WtiPipingSellmeijerRevisedKernelWrapperTests.cs)	(revision 6856)
@@ -363,7 +363,7 @@
         };
         kernelDataOutput.Message = message;
         var logMessages = new List<LogMessage>();
-        IKernelWrapper kernelWrapper = new WtiPipingSellmeijerRevisedKernelWrapper();
+        var kernelWrapper = new WtiPipingSellmeijerRevisedKernelWrapper();
 
         kernelWrapper.AddMessageToCalculationMessages(kernelDataOutput, logMessages);
 
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs
===================================================================
diff -u -r6851 -r6856
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs	(.../MacroStabilityInwardsKernelWrapper.cs)	(revision 6851)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs	(.../MacroStabilityInwardsKernelWrapper.cs)	(revision 6856)
@@ -114,8 +114,7 @@
 
                 const bool useRiverLevelLow = false;
                 // Determine whether there is uplift
-                var upliftHelper = new UpliftHelper();
-                PlLines plLines = upliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out UpliftSituation upliftSituation, out string warningMessage);
+                PlLines plLines = UpliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out UpliftSituation upliftSituation, out string warningMessage);
                 macroStabilityOutput.UpliftSituation = upliftSituation;
 
                 if (warningMessage != null)
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/UpliftHelper.cs
===================================================================
diff -u -r6851 -r6856
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/UpliftHelper.cs	(.../UpliftHelper.cs)	(revision 6851)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/UpliftHelper.cs	(.../UpliftHelper.cs)	(revision 6856)
@@ -40,8 +40,8 @@
     /// <param name="upliftSituation">The uplift situation.</param>
     /// <param name="warningMessage">The warning message.</param>
     /// <returns>pl lines</returns>
-    public PlLines DeterminePlLinesForStability(DamKernelInput damKernelInput, bool useRiverLevelLow,
-                                                out UpliftSituation upliftSituation, out string warningMessage)
+    public static PlLines DeterminePlLinesForStability(DamKernelInput damKernelInput, bool useRiverLevelLow,
+                                                       out UpliftSituation upliftSituation, out string warningMessage)
     {
         double riverLevel = damKernelInput.RiverLevelHigh;
         double? riverLevelLow = null;
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapperTests.cs
===================================================================
diff -u -r6851 -r6856
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapperTests.cs	(.../WtiPipingBlighKernelWrapperTests.cs)	(revision 6851)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapperTests.cs	(.../WtiPipingBlighKernelWrapperTests.cs)	(revision 6856)
@@ -271,7 +271,7 @@
         };
         kernelDataOutput.Message = message;
         var logMessages = new List<LogMessage>();
-        IKernelWrapper kernelWrapper = new WtiPipingBlighKernelWrapper();
+        var kernelWrapper = new WtiPipingBlighKernelWrapper();
 
         kernelWrapper.AddMessageToCalculationMessages(kernelDataOutput, logMessages);
 
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapperTests.cs
===================================================================
diff -u -r6851 -r6856
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapperTests.cs	(.../MacroStabilityInwardsKernelWrapperTests.cs)	(revision 6851)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapperTests.cs	(.../MacroStabilityInwardsKernelWrapperTests.cs)	(revision 6856)
@@ -600,7 +600,7 @@
         };
         kernelDataOutput.Message = message;
         var logMessages = new List<LogMessage>();
-        IKernelWrapper kernelWrapper = new MacroStabilityInwardsKernelWrapper();
+        var kernelWrapper = new MacroStabilityInwardsKernelWrapper();
 
         kernelWrapper.AddMessageToCalculationMessages(kernelDataOutput, logMessages);