Index: dam engine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile1DAquiferLayerCombiner.cs
===================================================================
diff -u -r677 -r806
--- dam engine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile1DAquiferLayerCombiner.cs	(.../SoilProfile1DAquiferLayerCombiner.cs)	(revision 677)
+++ dam engine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile1DAquiferLayerCombiner.cs	(.../SoilProfile1DAquiferLayerCombiner.cs)	(revision 806)
@@ -25,9 +25,10 @@
             double num1 = 0.0;
             double diameterD70 = layerWithName.Soil.DiameterD70;
             double num2 = 0.0;
-            int layerIndexAt = soilProfile1D.GetLayerIndexAt(layerWithName);
+
+            int startLayerIndex = soilProfile1D.GetLayerIndexAt(layerWithName);
             WaterpressureInterpolationModel interpolationModel = layerWithName.WaterpressureInterpolationModel;
-            for (; layerIndexAt < soilProfile1D.LayerCount && soilProfile1D.Layers[layerIndexAt].IsAquifer; ++layerIndexAt)
+            for (int layerIndexAt = startLayerIndex; layerIndexAt < soilProfile1D.LayerCount && soilProfile1D.Layers[layerIndexAt].IsAquifer; ++layerIndexAt)
             {
                 if (interpolationModel != soilProfile1D.Layers[layerIndexAt].WaterpressureInterpolationModel)
                 {