Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/DamPipingBligh/DamPipingBlighKernelWrapper.cs
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diff -u -r1070 -r1080
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/DamPipingBligh/DamPipingBlighKernelWrapper.cs	(.../DamPipingBlighKernelWrapper.cs)	(revision 1070)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/DamPipingBligh/DamPipingBlighKernelWrapper.cs	(.../DamPipingBlighKernelWrapper.cs)	(revision 1080)
@@ -334,9 +334,13 @@
                 double xEntry = surfaceLine.CharacteristicPoints.GetGeometryPoint(CharacteristicPointType.DikeToeAtRiver).X;
                 double xExit = upliftLocationAndResult.X;
                 damPipingBlighInput.SeepageLength = xExit - xEntry;
+                var topLevelAquifer = soilProfile.GetLayerWithName(upliftLocationAndResult.LayerWhereUpliftOccuresId).TopLevel;
+                double dCoverLayer = DamPipingHelper.DetermineHeightCoverLayer(topLevelAquifer, point.Z); // point.Z is surfacelevel
+                damPipingBlighInput.DTotal = dCoverLayer;
+                var referenceLevel = Math.Max(location.PolderLevel, point.Z); // point.Z is surfacelevel
+                damPipingBlighInput.HExit = referenceLevel;
                 // Calculate the piping safety factor using the level of the given point
                 PerformSingleCalculationBligh(out messages, damPipingBlighOutput, damPipingBlighInput);
-                //var sp = CalculatePipingFactorAtLevel(location, waterLevel, point.Z);
 
                 // If too low, then determine required height and length (from uplift)
                 if (damPipingBlighOutput.FoSp < requiredFoS)