Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs
===================================================================
diff -u -r4967 -r4970
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs	(.../PlLinesToWaternetConverter.cs)	(revision 4967)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs	(.../PlLinesToWaternetConverter.cs)	(revision 4970)
@@ -88,7 +88,7 @@
         if (headLine != null && !IsBelowSoilProfile(soilProfile1D, plLine))
         {
             waternet.HeadLineList.Add(headLine);
-            if (soilProfile1D.BottomAquiferLayer != null && pressureType == IntrusionVerticalWaterPressureType.SemiTimeDependent)
+            if (soilProfile1D.BottomAquiferLayer != null && pressureType == IntrusionVerticalWaterPressureType.SemiTimeDependent && penetrationLength > 0)
             {
                 double level = soilProfile1D.BottomAquiferLayer.TopLevel + penetrationLength;
                 WaternetLine waternetLine = CreateWaternetLine(level, xLeft, xRight);
@@ -156,7 +156,7 @@
             var headLine = CreateLine<HeadLine>(plLine, headLine2Name);
             waternet.HeadLineList.Add(headLine);
 
-            if (bottomAquiferCoordinates.Any() && pressureType == IntrusionVerticalWaterPressureType.SemiTimeDependent)
+            if (bottomAquiferCoordinates.Any() && pressureType == IntrusionVerticalWaterPressureType.SemiTimeDependent && penetrationLength > 0)
             {
                 WaternetLine waternetLine = CreateWaternetLine(bottomAquiferCoordinates, penetrationLength);
                 waternetLine.Name = waternetLine2Name;
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverterTests.cs
===================================================================
diff -u -r4967 -r4970
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverterTests.cs	(.../PlLinesToWaternetConverterTests.cs)	(revision 4967)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverterTests.cs	(.../PlLinesToWaternetConverterTests.cs)	(revision 4970)
@@ -463,8 +463,9 @@
     [TestCase(IntrusionVerticalWaterPressureType.Linear, 0, 3)]
     [TestCase(IntrusionVerticalWaterPressureType.HydroStatic, -9.999, 3)]
     [TestCase(IntrusionVerticalWaterPressureType.FullHydroStatic, -30.000, 1)]
-    [TestCase(IntrusionVerticalWaterPressureType.SemiTimeDependent, -9.999, 4)]
-    public void CreateWaternetBasedOnPlLines_ValidPLLinesAndSoilProfile2DWithContinuousInBetweenAquiferLayerConsistOfOnePart_ReturnsExpectedWaternet(IntrusionVerticalWaterPressureType? pressureType, double levelWaternetPl1, int waternetLineCount)
+    [TestCase(IntrusionVerticalWaterPressureType.SemiTimeDependent, -9.999, 4, penetrationLength)]
+    [TestCase(IntrusionVerticalWaterPressureType.SemiTimeDependent, -9.999, 3, 0)]
+    public void CreateWaternetBasedOnPlLines_ValidPLLinesAndSoilProfile2DWithContinuousInBetweenAquiferLayerConsistOfOnePart_ReturnsExpectedWaternet(IntrusionVerticalWaterPressureType? pressureType, double levelWaternetPl1, int waternetLineCount, double penetrationZone = double.NaN)
     {
         // Setup
         SoilLayer2D soilLayer = CreateRectangularSoilLayer2D(0, -10, leftCoordinate, rightCoordinate, false);
@@ -489,7 +490,7 @@
         PlLines plLines = CreateAllPlLines();
 
         // Call
-        Waternet waternet = PlLinesToWaternetConverter.CreateWaternetBasedOnPlLines(plLines, soilProfile, penetrationLength, pressureType);
+        Waternet waternet = PlLinesToWaternetConverter.CreateWaternetBasedOnPlLines(plLines, soilProfile, penetrationZone, pressureType);
 
         // Assert
         AssertGeometry(plLines.Lines[PlLineType.Pl1].Points, waternet.PhreaticLine.Points);
@@ -519,7 +520,7 @@
         ];
 
         WaternetLine pl2WaternetLine = waternet.WaternetLineList.Find(w => w.HeadLine.Name == "Head line 2 (PL 2)");
-        if (pressureType == IntrusionVerticalWaterPressureType.SemiTimeDependent)
+        if (pressureType == IntrusionVerticalWaterPressureType.SemiTimeDependent && penetrationZone > 0)
         {
             Assert.That(pl2WaternetLine.HeadLine, Is.SameAs(waternet.HeadLineList[0]));
             GeometryPoint[] offSetAquiferCoordinates = expectedBottomAquiferCoordinates.Select(aquiferCoordinate => new GeometryPoint(aquiferCoordinate.X, aquiferCoordinate.Z + penetrationLength))