Index: DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/Factories/FactoryForSurfaceLines.cs
===================================================================
diff -u -r5001 -r5002
--- DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/Factories/FactoryForSurfaceLines.cs	(.../FactoryForSurfaceLines.cs)	(revision 5001)
+++ DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/Factories/FactoryForSurfaceLines.cs	(.../FactoryForSurfaceLines.cs)	(revision 5002)
@@ -813,4 +813,31 @@
         surfaceLine.Geometry.SyncCalcPoints();
         return surfaceLine;
     }
+
+    /// <summary>
+    /// Creates a surface line, that contains a dike and is fully below SurfaceLineWithDikeAndDitch. 
+    /// </summary>
+    /// <returns>surface line</returns>
+    public static SurfaceLine2 CreateSurfaceLineBelowSurfaceLineDikeAndDitch()
+    {
+        var surfaceLine = new SurfaceLine2
+        {
+            Name = "BelowSurfaceLineWithDikeAndDitch",
+            Geometry = new GeometryPointString(),
+            CharacteristicPoints =
+            {
+                GeometryMustContainPoint = true
+            }
+        };
+
+        surfaceLine.EnsurePointOfType(0.0, -10.0, CharacteristicPointType.SurfaceLevelOutside);
+        surfaceLine.EnsurePointOfType(10.0, -10.0, CharacteristicPointType.DikeToeAtRiver);
+        surfaceLine.EnsurePointOfType(34.5, -5.0, CharacteristicPointType.DikeTopAtRiver);
+        surfaceLine.EnsurePointOfType(40.5, -5.0, CharacteristicPointType.DikeTopAtPolder);
+        surfaceLine.EnsurePointOfType(50.5, -10.0, CharacteristicPointType.DikeToeAtPolder);
+        surfaceLine.EnsurePointOfType(75.0, -10.0, CharacteristicPointType.SurfaceLevelInside);
+
+        surfaceLine.Geometry.SyncCalcPoints();
+        return surfaceLine;
+    }
 }
\ No newline at end of file
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelperTests.cs
===================================================================
diff -u -r5001 -r5002
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelperTests.cs	(.../MacroStabilityCommonHelperTests.cs)	(revision 5001)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelperTests.cs	(.../MacroStabilityCommonHelperTests.cs)	(revision 5002)
@@ -201,7 +201,7 @@
     }
 
     [Test, Ignore("Work in progress")]
-    public void GivenSoilGeometryProbabilityWithSoilProfile2DAndSurfaceLineFullyAboveSoilProfile2DWhenCombiningThenLayerIsAddedOnTopOfSoilProfile2D()
+    public void GivenSoilGeometryProbabilityWithSoilProfile2DAndSurfaceLineFullyAboveTopBoundarySoilProfile2DWhenCombiningThenLayerIsAddedOnTopOfSoilProfile2D()
     {
         SoilGeometryProbability soilGeometryProbability = CreateSoilGeometryProbabilityWithSoilProfile2DWithSurfaceLineDitchDike();
         SurfaceLine2 surfaceLine = FactoryForSurfaceLines.CreateSurfaceLineAboveSurfaceLineDikeAndDitch();
@@ -217,12 +217,35 @@
             Assert.That(soilGeometryProbability.SoilProfileType, Is.EqualTo(SoilProfileType.ProfileType2D));
             Assert.That(geometry.Surfaces, Has.Count.EqualTo(2));
             Assert.That(geometry.Left, Is.EqualTo(0.0).Within(cTolerance));
-            Assert.That(geometry.Right, Is.EqualTo(80.0).Within(cTolerance));
+            Assert.That(geometry.Right, Is.EqualTo(75.0).Within(cTolerance));
             Assert.That(geometry.Bottom, Is.EqualTo(-20.0).Within(cTolerance));
             Assert.That(geometry.MaxGeometryPointsZ, Is.EqualTo(10.0).Within(cTolerance));
         });
     }
 
+    [Test, Ignore("Work in progress")]
+    public void GivenSoilGeometryProbabilityWithSoilProfile2DAndSurfaceLineFullyBelowTopBoundarySoilProfile2DWhenCombiningThenMaterialAboveIsRemoved()
+    {
+        SoilGeometryProbability soilGeometryProbability = CreateSoilGeometryProbabilityWithSoilProfile2DWithSurfaceLineDitchDike();
+        SurfaceLine2 surfaceLine = FactoryForSurfaceLines.CreateSurfaceLineBelowSurfaceLineDikeAndDitch();
+        // Now combine the soilGeometryProbability with the surfaceLine which should result that the top part of the 
+        // SoilProfile2D is removed (between top boundary of the SoilProfile2D and the surfaceLine)
+        MacroStabilityCommonHelper.CombineSoilProfileWithSurfaceLine(soilGeometryProbability, surfaceLine, new Soil());
+        GeometryData geometry = soilGeometryProbability.SoilProfile2D.Geometry;
+        // For debugging purposes
+        // GeometryExporter.ExportToFile(geometry, visualizationFolder + "Geometry.txt");
+        // GeometryExporter.ExportToJsonFile(geometry, visualizationFolder + "Geometry.json");
+        Assert.Multiple(() =>
+        {
+            Assert.That(soilGeometryProbability.SoilProfileType, Is.EqualTo(SoilProfileType.ProfileType2D));
+            Assert.That(geometry.Surfaces, Has.Count.EqualTo(1));
+            Assert.That(geometry.Left, Is.EqualTo(0.0).Within(cTolerance));
+            Assert.That(geometry.Right, Is.EqualTo(75.0).Within(cTolerance));
+            Assert.That(geometry.Bottom, Is.EqualTo(-20.0).Within(cTolerance));
+            Assert.That(geometry.MaxGeometryPointsZ, Is.EqualTo(-5.0).Within(cTolerance));
+        });
+    }
+
     private SoilGeometryProbability CreateSoilGeometryProbabilityWithSoilProfile2DWithSurfaceLineDitchDike()
     {
         SoilGeometryProbability soilGeometryProbability = FactoryForSoilGeometryProbabilities.CreateSoilGeometryProbabilityWithSoilProfile1D();