Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/PlLinesCreator/PlLinesCreator.cs
===================================================================
diff -u -r6867 -r6874
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/PlLinesCreator/PlLinesCreator.cs	(.../PlLinesCreator.cs)	(revision 6867)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/PlLinesCreator/PlLinesCreator.cs	(.../PlLinesCreator.cs)	(revision 6874)
@@ -483,7 +483,8 @@
         SoilProfile2DHelper.DetermineAquiferLayerBoundaryPoints(SoilProfile2DHelper.LayerType.BottomAquiferCluster, SoilProfile2D, out Point2D[] bottomAquiferCoordinates, out _);
         List<Point2D> topLevelPenetrationZone = bottomAquiferCoordinates.Select(p => new Point2D(p.X, p.Z + penetrationLength)).ToList();
 
-        // Compare both lines
+        // Compare both lines: check if the top level of the penetration zone has a point above the top level of the 
+        // infiltration layers. If so, return false.
         foreach (Point2D point in topLevelPenetrationZone)
         {
             RelativeXzPosition position = topLevelInfiltrationLayers.PositionXzOfPointRelatedToExtrapolatedLine(point);