Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilLayer2D.cs
===================================================================
diff -u -r5061 -r5111
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilLayer2D.cs	(.../SoilLayer2D.cs)	(revision 5061)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilLayer2D.cs	(.../SoilLayer2D.cs)	(revision 5111)
@@ -20,6 +20,8 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using Deltares.DamEngine.Data.Geometry;
 using Deltares.DamEngine.Data.Standard.Language;
 
@@ -65,6 +67,11 @@
             WaterpressureInterpolationModel = WaterpressureInterpolationModel,
             GeometrySurface = GeometrySurface.Clone()
         };
+        var clonedLoop = GeometrySurface.OuterLoop.Clone();
+        clonedSoilLayer2D.GeometrySurface.OuterLoop = clonedLoop;
+        List<GeometryLoop> innerLoops = new List<GeometryLoop>();
+        innerLoops.AddRange(GeometrySurface.InnerLoops.Select(loop => loop.Clone()).ToList());
+        clonedSoilLayer2D.GeometrySurface.InnerLoops.AddRange(innerLoops);
         return clonedSoilLayer2D;
     }