Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesDesign/DesignCalculator.cs
===================================================================
diff -u -r1371 -r1376
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesDesign/DesignCalculator.cs	(.../DesignCalculator.cs)	(revision 1371)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesDesign/DesignCalculator.cs	(.../DesignCalculator.cs)	(revision 1376)
@@ -201,7 +201,7 @@
             finally
             {
                 // Restore the original surfaceline
-                location.SurfaceLine = orgLocationSurfaceLine.FullDeepClone();
+                location.SurfaceLine = orgLocationSurfaceLine;
 
             }