Index: dam engine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs
===================================================================
diff -u -r452 -r486
--- dam engine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs	(.../Soil.cs)	(revision 452)
+++ dam engine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs	(.../Soil.cs)	(revision 486)
@@ -151,6 +151,44 @@
         }
         #endregion
 
+        #region Piping
+        /// <summary>
+        /// Bedding Angle (degree).
+        /// </summary>
+        /// <value>
+        /// The bedding angle.
+        /// </value>
+        public double BeddingAngle { get; set; } =  double.NaN;
+        /// <summary>
+        /// Diameter D70 (micrometer).
+        /// </summary>
+        /// <value>
+        /// The diameter D70.
+        /// </value>
+        public double DiameterD70 { get; set; } = double.NaN;
+        /// <summary>
+        /// Horizontal permeability (m/s)
+        /// </summary>
+        /// <value>
+        /// The permeab kx.
+        /// </value>
+        public double PermeabKx { get; set; } = double.NaN;
+        /// <summary>
+        /// Whites constant (-).
+        /// </summary>
+        /// <value>
+        /// The whites constant.
+        /// </value>
+        public double WhitesConstant { get; set; } = double.NaN;
+        /// <summary>
+        /// Diameter D90 (micrometer).
+        /// </summary>
+        /// <value>
+        /// The diameter D90.
+        /// </value>
+        public double DiameterD90 { get; set; } = double.NaN;
+        #endregion
+
         #region property AbovePhreaticLevel
 
         /// <summary>