Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/Common/UpliftHelperTests.cs
===================================================================
diff -u -r3669 -r3879
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/Common/UpliftHelperTests.cs	(.../UpliftHelperTests.cs)	(revision 3669)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/Common/UpliftHelperTests.cs	(.../UpliftHelperTests.cs)	(revision 3879)
@@ -43,11 +43,12 @@
                 Path.Combine(damKernelInput.Location.StabilityOptions.SoilGeometries2DPath, soilGeometry2DName));
 
             damKernelInput.Location.ModelFactors.UpliftCriterionStability = 1.2;
-            var upliftSituation = UpliftHelper.DetermineStabilityUplift(damKernelInput, false);
+            var upliftHelper = new UpliftHelper();
+            var upliftSituation = upliftHelper.DetermineStabilityUplift(damKernelInput, false);
             Assert.IsTrue(upliftSituation.IsUplift);
 
             damKernelInput.Location.ModelFactors.UpliftCriterionStability = 0.8;
-            upliftSituation = UpliftHelper.DetermineStabilityUplift(damKernelInput, false);
+            upliftSituation = upliftHelper.DetermineStabilityUplift(damKernelInput, false);
             Assert.IsFalse(upliftSituation.IsUplift);
         }
 
@@ -63,11 +64,12 @@
             damKernelInput.SubSoilScenario.SoilProfile2D = soilProfile2D;
 
             damKernelInput.Location.ModelFactors.UpliftCriterionStability = 1.2;
-            var upliftSituation = UpliftHelper.DetermineStabilityUplift(damKernelInput, false);
+            var upliftHelper = new UpliftHelper();
+            var upliftSituation = upliftHelper.DetermineStabilityUplift(damKernelInput, false);
             Assert.IsTrue(upliftSituation.IsUplift);
             
             damKernelInput.Location.ModelFactors.UpliftCriterionStability = 0.8;
-            upliftSituation = UpliftHelper.DetermineStabilityUplift(damKernelInput, false);
+            upliftSituation = upliftHelper.DetermineStabilityUplift(damKernelInput, false);
             Assert.IsFalse(upliftSituation.IsUplift);
         }
         
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityOutwards/MacroStabilityOutwardsKernelWrapper.cs
===================================================================
diff -u -r3819 -r3879
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityOutwards/MacroStabilityOutwardsKernelWrapper.cs	(.../MacroStabilityOutwardsKernelWrapper.cs)	(revision 3819)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityOutwards/MacroStabilityOutwardsKernelWrapper.cs	(.../MacroStabilityOutwardsKernelWrapper.cs)	(revision 3879)
@@ -93,7 +93,8 @@
 
                     const bool useRiverLevelLow = false;
                     //Determine pl Lines.
-                    var plLines = UpliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out _);
+                    var upliftHelper = new UpliftHelper();
+                    var plLines = upliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out _);
                     
                     var fillMacroStabilityWrapperFromEngine = new FillMacroStabilityWrapperInputFromEngine
                     {
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs
===================================================================
diff -u -r3819 -r3879
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs	(.../MacroStabilityInwardsKernelWrapper.cs)	(revision 3819)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs	(.../MacroStabilityInwardsKernelWrapper.cs)	(revision 3879)
@@ -98,8 +98,9 @@
                     
                     const bool useRiverLevelLow = false;
                     // Determine whether there is uplift
-                    var plLines = UpliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out var upliftSituation);
-                    upliftSituation.IsUplift = UpliftHelper.DetermineIsUplift(plLines, damKernelInput.Location, damKernelInput.SubSoilScenario);
+                    var upliftHelper = new UpliftHelper();
+                    var plLines = upliftHelper.DeterminePlLinesForStability(damKernelInput, useRiverLevelLow, out var upliftSituation);
+                    upliftSituation.IsUplift = upliftHelper.DetermineIsUplift(plLines, damKernelInput.Location, damKernelInput.SubSoilScenario);
                     
                     var fillMacroStabilityWrapperFromEngine = new FillMacroStabilityWrapperInputFromEngine
                     {
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/UpliftHelper.cs
===================================================================
diff -u -r3782 -r3879
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/UpliftHelper.cs	(.../UpliftHelper.cs)	(revision 3782)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/UpliftHelper.cs	(.../UpliftHelper.cs)	(revision 3879)
@@ -38,7 +38,7 @@
         /// <param name="damKernelInput">The dam kernel input.</param>
         /// <param name="useRivelLevelLow">if set to <c>true</c> [use rivel level low].</param>
         /// <returns>The uplift situation</returns>
-        public static UpliftSituation DetermineStabilityUplift(DamKernelInput damKernelInput, bool useRivelLevelLow)
+        public UpliftSituation DetermineStabilityUplift(DamKernelInput damKernelInput, bool useRivelLevelLow)
         {
             UpliftSituation upliftSituation;
             var plLines = DeterminePlLinesForStability(damKernelInput, useRivelLevelLow, out upliftSituation);
@@ -53,7 +53,7 @@
         /// <param name="useRivelLevelLow">if set to <c>true</c> [use rivel level low].</param>
         /// <param name="upliftSituation">The uplift situation.</param>
         /// <returns>pl lines</returns>
-        public static PlLines DeterminePlLinesForStability(DamKernelInput damKernelInput, bool useRivelLevelLow, 
+        public PlLines DeterminePlLinesForStability(DamKernelInput damKernelInput, bool useRivelLevelLow, 
             out UpliftSituation upliftSituation)
         {
             var riverLevel = damKernelInput.RiverLevelHigh;
@@ -77,7 +77,7 @@
         /// <param name="location">The location.</param>
         /// <param name="subSoilScenario">The sub soil scenario.</param>
         /// <returns><c>true</c> if there is uplift</returns>
-        public static bool DetermineIsUplift(PlLines plLines, Location location, SoilGeometryProbability subSoilScenario)
+        public bool DetermineIsUplift(PlLines plLines, Location location, SoilGeometryProbability subSoilScenario)
         {
             if (plLines == null) return false;
             var upliftCriterion = location.ModelFactors.UpliftCriterionStability;
@@ -88,7 +88,7 @@
             return upliftFactor < upliftCriterion;
         }
 
-        private static double? GetLowestUpliftFactor(SurfaceLine2 surfaceLine, SoilProfile1D soilProfile1D, string soilGeometry2DName,
+        private double? GetLowestUpliftFactor(SurfaceLine2 surfaceLine, SoilProfile1D soilProfile1D, string soilGeometry2DName,
             SoilProfile2D soilProfile2D, PlLines plLines, Location location)
         {
             var upliftLocationDeterminator = new UpliftLocationDeterminator()