Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Factories/MacroStabilityInwardsChartDataPointsFactory.cs
===================================================================
diff -u -r5d98c3072517f99bfc6f05a363ea5cf4d6025bd8 -r5e729a1d841de96632bcbf8581484ff608202edf
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Factories/MacroStabilityInwardsChartDataPointsFactory.cs	(.../MacroStabilityInwardsChartDataPointsFactory.cs)	(revision 5d98c3072517f99bfc6f05a363ea5cf4d6025bd8)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Factories/MacroStabilityInwardsChartDataPointsFactory.cs	(.../MacroStabilityInwardsChartDataPointsFactory.cs)	(revision 5e729a1d841de96632bcbf8581484ff608202edf)
@@ -552,16 +552,16 @@
                         continue;
                     }
 
+                    IEnumerable<Point2D> waternetZonePoints = waternetZoneIntersection.OrderBy(p => p.Y);
+
                     if (Math.Abs(waternetTopDelta) < 1e-6 || waternetTopDelta < 0)
                     {
-                        IEnumerable<Point2D> waternetZonePoints = waternetZoneIntersection.OrderBy(p => p.Y);
-
                         bottomLine.Add(waternetZonePoints.First());
                         topLine.Add(waternetZonePoints.Last());
                     }
                     else if (waternetTopDelta > 0 && waternetBottomDelta < 0)
                     {
-                        bottomLine.Add(waternetZoneIntersection.OrderBy(p => p.Y).First());
+                        bottomLine.Add(waternetZonePoints.First());
                         topLine.Add(surfaceLineIntersection);
                     }
                 }